Answer:
observed?Brownian motion is the random movement of particles suspended in a fluid due to collisions with other molecules in the fluid. In this case, the food coloring molecules are suspended in the water, which is a fluid, and the random movement of the water molecules causes the food coloring molecules to move around in a random pattern. This movement is similar to the movement of atoms in a gas or liquid, which is also driven by Brownian motion. So, the concept of Brownian motion helps to explain the random movement of the food coloring molecules in the water, as observed in the experiment.
7. How many molecules of food dye were actually in the last solution? To calculate this we need to make some assumptions:
a. 10 drops of the 100% solution has a mass of 1 gram.
b. 1 gram of food dye has approximately 1.2*1022 molecules in it. (this is
based on its molecular weight and a little finagling with Avogadro's
number)
I
c. Now, depending on how many dilutions you made, you can figure out
how many molecules of food dye are actually sitting on the
bottom of your crucible. HINT: your first dilution has 1/10 the
number of molecules as the original Dye.
SHOW YOUR CALCULATIONS HERE:
There are approximately [tex]1.2*10^17[/tex] molecules of food dye in the last solution.
Assuming that one drop of 100% solution is approximately 0.1 mL, then 10 drops of the 100% solution would be equivalent to 1 mL. If this 1 mL of the 100% solution was diluted to a final volume of 50 mL, then the dilution factor is 50.
Using the given approximation of 1 gram of food dye having approximately [tex]1.2*10^22[/tex] molecules, we can calculate the number of molecules in the original 1 mL of the 100% solution to be:
1 g * ([tex]1.210^22[/tex]molecules/g) = [tex]1.210^22[/tex]molecules
For the first dilution, the number of molecules would be 1/10th of this value, or:
(1/10) * [tex]1.210^221.210^22[/tex] = [tex]1.210^21[/tex]molecule
For the second dilution, the number of molecules would be 1/10th of this value, or:
[tex](1/10) * 1.210^21 = 1.210^20[/tex] molecules
If this process was repeated for a total of 5 dilutions, the number of molecules in the final solution would be:
[tex](1/10)^5 * 1.210^22 = 1.210^17[/tex]molecules
Therefore, there are approximately [tex]1.2*10^17[/tex] molecules of food dye in the last solution.
Learn more about molecules here
https://brainly.com/question/19922822
#SPJ1
how many grams of NaHCO3 would be required to produce one mole of carbon dioxide?
One mole of carbon dioxide would require 84.01 grams of NaHCO₃.
NaHCO₃ produces how many moles of CO₂?It is discovered that the ratio of moles of CO₂ generated to moles of NaHCO₃ reacted is 1:2.
We can observe from this equation that 1 mole of NaHCO₃ results in 1 mole of CO₂. As a result, NaHCO₃ and CO₂ have a molar ratio of 1:1.
Na2CO₃(s) + H₂O(g) + CO₂ = 2 NaHCO₃(s)(g)
CO₂ has a molar mass of about 44.01 g/mol. As a result, we must determine how much NaHCO₃ weighs in relation to one mole of CO₂. Using the molar mass of NaHCO₃, the following can be calculated:
Molar mass of NaHCO₃ is 84.01 g/mol.
The mass of NaHCO₃ needed to create one mole of CO₂ is as follows:
(84.01 g NaHCO₃/1 mole NaHCO₃) = 84.01 g CO₂/mol for 1 mole of NaHCO₃.
To know more about moles visit:
brainly.com/question/29130470
#SPJ1
How many grams of H3PO3 would be produced from the complete reaction of 93.2 g P2O3? P₂O3 + 3H₂O → 2H3PO3 2₂03 | 19 93.2 g P₂03 [?] Which answer choice number goes in the green box? 1) 1 mol P₂03 2) 110 g P2O3 3) 2 mol H3PO3 4) 82 g H3PO3
Answer:
2) 110 g P2O3
Explanation:
If the green box is in the denominator of a fraction and represents the molar mass of P2O3, then the correct answer choice would be 2) 110 g P2O3. Here’s how you can use this value to solve the problem:
The balanced chemical equation for the reaction between P2O3 and H2O to produce H3PO3 is: P2O3 + 3H2O → 2H3PO3.
From this equation, we can see that 1 mole of P2O3 reacts with 3 moles of H2O to produce 2 moles of H3PO3. So the number of moles of H3PO3 produced is twice the number of moles of P2O3 that reacted.
The molar mass of P2O3 is approximately 110 g/mol. So 93.2 g of P2O3 is equivalent to (93.2 g) / (110 g/mol) = 0.848 mol of P2O3.
Since the number of moles of H3PO3 produced is twice the number of moles of P2O3 that reacted, the number of moles of H3PO3 produced is 0.848 mol × 2 = 1.696 mol.
The molar mass of H3PO3 is (3 × 1.01 g/mol) + (1 × 30.97 g/mol) + (3 × 16.00 g/mol) = 81.99 g/mol. So 1.696 mol of H3PO3 is equivalent to (1.696 mol) × (81.99 g/mol) = 139 g of H3PO3.
So the complete reaction of 93.2 g P2O3 would produce approximately 139 g of H3PO3.
A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas when the volume increased to 4.5atm
Answer:
the pressure of the gas is 1.67 atm when the volume increased to 4.5 L.
Explanation:
Assuming the temperature and the amount of gas remain constant (i.e., the process is isobaric):
Using Boyle's law, we can relate the initial pressure (P1) and volume (V1) to the final pressure (P2) and volume (V2):
P1V1 = P2V2
Plugging in the given values:
P1 = 1.50 atm
V1 = 5.00 L
V2 = 4.5 L
Solving for P2:
P2 = (P1V1)/V2 = (1.50 atm x 5.00 L)/4.5 L = 1.67 atm
The first step in the industrial recovery of zinc from zinc sulfide ore is roasting, that is, the conversion of ZnS to ZnO by heating: 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) ΔH = –879 kJ/mol Based on your answer to the first question, calculate the heat for the reaction per gram of ZnS used (kJ/g). Hint: Use the molar mass of ZnS: 97.46 g/mo
The heat for the reaction per gram of ZnS used is -4.51 kJ/g.
To calculate the heat for the reaction per gram of ZnS used, we need to first calculate the amount of heat released per mole of ZnS used and then convert that to per gram.
The given balanced chemical equation shows that 2 moles of ZnS react with 3 moles of O2 to produce 2 moles of ZnO and 2 moles of SO2, and the amount of heat released during the reaction is -879 kJ/mol.
So, the amount of heat released per mole of ZnS used is:
(-879 kJ/mol) / 2 = -439.5 kJ/mol
Now, to calculate the amount of heat released per gram of ZnS used, we need to divide the amount of heat released per mole by the molar mass of ZnS:
-439.5 kJ/mol / 97.46 g/mol = -4.51 kJ/g.
Learn more about molar mass here:
https://brainly.com/question/12127540
#SPJ1
Is the reaction as written endo or exothermic? How did you come to this conclusion?
[Co(H2O)6]2+(aq) + 4Cl-(aq) ⇌ [CoCl4]2-(aq) + 6H2O(l)
This reaction is endothermic because energy is absorbed during the reaction. This can be seen by looking at the change in the enthalpy of the reactants compared to the products.
Given the reaction is as follows: [tex][Co(H_2O)_6]_2(aq) + 4Cl^{-}(aq) < -- > [CoCl_4]_2^{-}(aq) + 6H_2O(l)[/tex]
The products have a higher enthalpy than the reactants, meaning that the reaction absorbs energy and is endothermic. This can also be determined by looking at the oxidation states of the elements involved. The oxidation state of the cobalt atom in[tex][Co(H_2O)_6]^{2+}[/tex] is +2, while the oxidation state of the cobalt atom in [tex][CoCl_4]^{2-[/tex] is +3. This indicates that the cobalt atom has been oxidized, which requires energy and makes the reaction endothermic.
To learn more about endothermic click here https://brainly.com/question/31214950
#SPJ1
What is the ratio of aluminum to hydrogen in 2Al + 3H2SO4 = 3H2 + Al2(SO4)3
The ratio of aluminum to hydrogen in the reaction is 2:3. For every 2 moles of aluminum that reacts, 3 moles of hydrogen are produced.
The balanced chemical equation for the reaction 2Al + 3H₂SO₄ = 3H₂ + Al₂(SO₄)₃ shows that 2 moles of aluminum (2Al) reacts with 3 moles of sulfuric acid (3H₂SO₄) to produce 3 moles of hydrogen gas (3H₂) and 1 mole of aluminum sulfate (Al₂(SO₄)₃).
o express the ratio in terms of the number of atoms of each element involved in the reaction, we need to consider the coefficients of the balanced chemical equation. The coefficient in front of each element or compound indicates the number of moles of that substance involved in the reaction.
In the given equation, the coefficient for aluminum (Al) is 2 and the coefficient for hydrogen (H) is 6 (3 on each side). Therefore, the ratio of aluminum atoms to hydrogen atoms in the reaction is 2:6, which simplifies to 1:3.
So, for every one atom of aluminum that reacts, three atoms of hydrogen are produced. This can also be expressed as the molar ratio of aluminum to hydrogen, which is 2:3.
Learn more about moles here:
https://brainly.com/question/28239680
#SPJ1
glucose is a six carbon sugar. Albumin is a protein with 607 amino acids. the average molecular weight of a single amino acid is 135 g/mol. there is no reason to run these solutes at the 20 MWCO because
There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.
The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.
In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.
They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.
Learn more about glucose here:
https://brainly.com/question/2396657
#SPJ1
Challenge AH for the following reaction is -1789 kJ. Use this and Equation a to
determine AH for Equation b.
4Al(s) + 3MnO₂ (s) → 2Al₂O3(s) + 3Mn(s) AH = -1789 kJ
a. 4Al(s) + 30₂(g) → 2Al₂O3(s) AH = -3352 kJ
b. Mn(s) + O₂(g) →→MnO₂(s) AH = ?
The enthalpy change for the reaction Mn(s) + O₂(g) → MnO₂(s) is +1563 kJ/mol
What is Enthalpy?
Enthalpy is a measure of the total heat energy in a thermodynamic system. It is represented by the symbol H and is typically measured in units of joules or calories. Enthalpy can be used to describe the amount of heat that is absorbed or released during a chemical reaction or a phase change in a substance. It is a useful concept in thermodynamics and is commonly used in chemical and physical processes.
To determine AH for Equation b, we can use Hess's Law which states that if a reaction is carried out in a series of steps, the sum of the enthalpy changes for the individual steps will be equal to the enthalpy change for the overall reaction.
First, we need to manipulate Equation a to obtain the same number of moles of MnO₂ as in Equation b.
4Al(s) + 3MnO₂(s) → 2Al₂O3(s) + 3Mn(s) (multiply by 2/3)
8/3 Al(s) + 2MnO₂(s) → 4/3 Al₂O3(s) + 2Mn(s)
Next, we can write the overall reaction as:
8/3 Al(s) + 2MnO₂(s) + 3/2 O₂(g) → 4/3 Al₂O3(s) + 2Mn(s) + O₂(g)
The enthalpy change for this reaction can be calculated by adding the enthalpy change of Equation a and the opposite of the enthalpy change of Equation b (because Equation b is the reverse of the reaction in Equation a):
AH = (-3352 kJ/mol) + (-(-1) * (-1789 kJ/mol))
AH = -3352 kJ/mol + 1789 kJ/mol
AH = -1563 kJ/mol
Learn more about Enthalpy from the given link
https://brainly.com/question/14047927
#SPJ1
You use a volumetric pipers to take 10ml of stock solution of KMnO4 and add water to make a more dilute solution in a 100ml volumetric flask. is there more potassium permanganate in the volumetric pipette or the 100ml solution? Justify your answer.
The amount of potassium permanganate (KMnO4) in the volumetric pipette and the 100 ml solution is the same.
When a volumetric pipette is used to take 10 ml of the stock solution, it is designed to deliver an accurate volume of liquid, ensuring that the amount of solute (KMnO4) is accurately transferred to the flask. By adding water to the volumetric flask to make a more dilute solution, the total amount of solute (KMnO4) remains the same, but it is now distributed throughout the larger volume of the flask.
Therefore, there is no more or less KMnO4 in the volumetric pipette or the 100 ml solution. Both contain the same amount of KMnO4, which was accurately transferred using the volumetric pipette. It is important to note that accuracy in transferring the correct volume is critical in ensuring that the concentration of the diluted solution is correct.
To know more about potassium permanganate, visit:
https://brainly.com/question/29526566
#SPJ1
Calculate the number of moles of O2 produced using the ideal gas law. Then, use this value to calculate the number of moles of hydrogen peroxide you began the experiment with.
Hint: Use the balanced equation provided in the lab introduction.
2H2O2(aq)→ 2H2O(l)+O2(g)
The ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions,then the answer is that 0.0025 moles of oxygen gas were created by your process.
When pressure and temperature are the same, the amount of oxygen gas created by your reaction will be 0.0025 moles.
In accordance with the equation for a balanced chemical reaction, hydrogen peroxide, or H₂O₂, breaks down to produce water and oxygen gas.
2H2O2(aq)→2H2O(l)+O2(g)
You have all the data necessary to solve for the amount of moles of oxygen gas created using the ideal gas law equation because you have collected 0.061 L of oxygen gas at 295.15 K and 1 atm.
PV=nRT n=PVRT nO₂=1atm * 0.061L / (0.082 (L * atm / mol * K)) =0.0025 moles
Hence, if this was your initial inquiry, then the answer is that 0.0025 moles of oxygen gas were created by your process.
learn more about ideal gas law here:
https://brainly.com/question/28257995
#SPJ1
What volume was present before the dilution of a 1.00 M KOH solution if the new concentration is 0.250 M and the volume has increased to 450 mL?
___ mL (Answer Format XXX.X)
Answer: 112.5 mL
Explanation:
We can use the dilution formula to determine the initial volume of the 1.00 M KOH solution:
M1V1 = M2V2
where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.
Plugging in the given values, we get:
1.00 M x V1 = 0.250 M x 450 mL
Solving for V1, we get:
V1 = (0.250 M x 450 mL) / 1.00 M
V1 = 112.5 mL
Zircons from the basalt flow we’re measured to have 95.8% uranium-238, and 4.2% Lead-206. What is the age of the basalt flow?
Answer:
5
Explanation:
If I add acid to a 100 mL of a 0.15 M NaOH solution until it is titrated with 150 mL of acid, what will the molarity of the acid solution be?
(last question, I swear this time)
Assuming the acid used for titration is a strong acid (such as HCl), the balanced chemical equation for the reaction would be:
HCl + NaOH → NaCl + H2O
From the equation, we can see that 1 mole of HCl reacts with 1 mole of NaOH. Therefore, the number of moles of HCl used for titration can be calculated as:
moles of HCl = moles of NaOH = M x V x n
where M is the molarity of NaOH, V is the volume of NaOH used (100 mL or 0.1 L), and n is the number of moles of NaOH per liter of solution (1 mole/L).
moles of HCl = 0.15 M x 0.1 L x 1 mol/L = 0.015 mol
Since the volume of acid used for titration is 150 mL or 0.15 L, we can calculate the molarity of the acid as:
Molarity of acid = moles of acid / volume of acid used
Molarity of acid = 0.015 mol / 0.15 L = 0.1 M
Therefore, the molarity of the acid solution is 0.1 M.
What are the answer
CH2, N2O3 are covalent
NH4ClO, Fe3(PO4)2 and CrBr2 are ionic
What are ionic and covalent compounds?Ionic compounds are formed when a metal atom donates one or more electrons to a nonmetal atom. This transfer of electrons creates ions, which are charged particles that attract each other due to their opposite charges.
Covalent compounds, on the other hand, are formed when two or more nonmetal atoms share electrons. In this type of bonding, each atom contributes one or more electrons to a shared pair, creating a covalent bond.
Learn more about ionic compound:https://brainly.com/question/3222171
#SPJ1
Elemental analysis of a compound gives the following mass percent composition: C 40.00%, H 6.72%, O 53.28%. The molar mass of the compound is 180.16 g/mol. Determine the molecular formula of the compound.
Can someone explain the steps on how to figure out the problem.
The molecular formula of the compound is [tex]C_6H_{12}O_6[/tex] whose molar mass is 180.16g/mol with mass percent composition: C 40.00%, H 6.72%, O 53.28%.
Given the mass percent compositions as:
the mass percent composition of carbon (C) = 40.00%
the mass percent composition of hydrogen (H) = 6.72%
the mass percent composition of oxygen (O) = 53.28%
The molar mass of the compound is = 180.16 g/mol.
Let us assume we have 100g of compound then,
we have 40g of carbon, 6.72g of hydrogen and 53.28g of oxygen.
The atomic masses of carbon, hydrogen, and oxygen, respectively, are 12.01 g/mol, 1.01 g/mol, and 16.00 g/mol.
We need to calculate the number of moles of each element present in the compound.
Number of moles of carbon = 40.00/12.01 g/mol = 3.33 moles
Number of moles of hydrogen = 6.72/1.01 g/mol = 6.65 moles
Number of moles of oxygen = 53.28/16.00 g/mol = 3.33 moles
Total number of moles = 3.33 + 6.65 + 3.33 = 13.31 moles
Mole ratio of carbon, hydrogen and carbon = 3.33 : 6.65 : 3.33
Mole ratio of carbon, hydrogen and carbon = 1 : 2 : 1
The empirical formula is = [tex]CH_2O[/tex]
The empirical formula mass of [tex]CH_2O[/tex] is = 30.03
n = 180.18/30.03 = 6
The molecular formula is = [tex]C_6H_{12}O_6[/tex]
To learn more about molecular formula click here https://brainly.com/question/28647690
#SPJ1
IPA is extracted from the IPA-cyclohexane mixture containing 40% IPA in a countercurrent extraction unit using water. The amount of water in the feed
its mass ratio to the amount of oil is 5.25 and the balance data are given in the figure below. The ideal number of racks required for the final raffin to contain 20% IPA and the % of the first extract.
Determine its composition.
To answer your question, we will need to utilize the given information and perform calculations using the provided terms, such as the IPA-cyclohexane mixture, countercurrent extraction unit, mass ratio, and ideal number of racks.
First, let's find the initial composition of the mixture:
- 40% IPA (isopropanol)
- 60% Cyclohexane
Now, using the given mass ratio of water to oil (5.25), we can calculate the amounts of water and oil in the feed. Since we don't have exact values for the amounts, let's assume there are 100 units of the mixture.
- Water: (5.25 * 100) / (5.25 + 1) ≈ 84.0 units
- Oil: 100 units
The countercurrent extraction unit uses water to extract the IPA from the mixture. The objective is to achieve a final raffinate containing 20% IPA.
To determine the ideal number of racks and the composition of the first extract, we would need the provided balance data figure, which is not available in the question. However, by following the steps below, you can determine the values using the balance data figure:
1. Locate the initial point on the balance data figure, corresponding to the 40% IPA composition in the mixture.
2. Draw a tie line connecting the initial point to the mass ratio line (5.25) on the figure.
3. Identify the intersection point of the tie line with the mass ratio line, which represents the composition of the first extract.
4. Calculate the number of ideal racks by drawing a series of tie lines and steps from the initial point towards the final raffinate point (20% IPA) on the balance data figure.
By following these steps and using the provided balance data figure, you can determine the ideal number of racks required for the countercurrent extraction unit and the composition of the first extract.
For more questions on: extraction
https://brainly.com/question/28976060
#SPJ11
The largest salt mine in world extracts 7.00 million tons of halite(mineral nomenclature of NaCl) annually. How many noles of NaCl are extracted each year? You may need the fact that 1 ton=2,000 lb. (Exactly) and 1 kg= 2.205 lb. Express your answer in standard notation; and of course, to the correct number of sig figs.
Approximately 5.43 x [tex]10^{13}[/tex] moles of NaCl are extracted each year from the largest salt mine in the world.
What is NaCl?
NaCl is the chemical formula for table salt, which is a compound made up of sodium and chlorine ions. It is a white, crystalline solid that is commonly used as a seasoning and preservative in food, as well as in many industrial processes. NaCl is highly soluble in water and is an important electrolyte in the human body, helping to regulate many physiological processes.
First, we need to convert 7.00 million tons to kilograms:
7.00 million tons x 2,000 lb/ton x 1 kg/2.205 lb = 3.17 x [tex]10^{9}[/tex]kg
Next, we need to calculate the number of moles of NaCl present in this amount of halite:
Molar mass of NaCl = 58.44 g/mol
3.17 x [tex]10^{9}[/tex] kg x 1000 g/kg / 58.44 g/mol = 5.43 x [tex]10^{13}[/tex] moles of NaCl
Learn more about NaCl from the given link
https://brainly.com/question/24878544
#SPJ1
2. a) what is the empirical formula of an ingredient in bufferin table that has the percent composition C1:4.25%, 0:56 93% and Mg: 28.83 % by mass
b) An analysis of sample of an organic compound shows that it contains 39.9 % C, 6.9% H, and 53,2% 1. calculate the empirical formula of the compound
2. the relative molecular mass is 60 what is the molecular formula of the compound?
Explanation:
a)Take percentages and divide by mole wt ( from periodic table) of the corresponding element
C 14.25 / 12 = 1.1875
O 56.93 / 15.99 = 3.56
Mg 28.83/24.3 = 1.186 Divide by the smallest number
C 1.1875/1.186 = 1
O 3.56 / 1.186 = 3
Mg 1.186 / 1.186 = 1
C O3 Mg commonly written as Mg CO3 ( magnesium carbonate)
At 750 mmHg and 298 K, a gas sample has a volume of 1.27 L. What is the final pressure (in mmHg) at a volume of 0.75 L and a temperature of 448 K, if the amount of gas does not change?
Answer:
To solve the problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas:
(P1V1) / T1 = (P2V2) / T2
where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively. We are given P1 = 750 mmHg, V1 = 1.27 L, T1 = 298 K, V2 = 0.75 L, T2 = 448 K, and the amount of gas does not change.
First, we can solve for P2 by rearranging the equation as:
P2 = (P1V1T2) / (V2T1)
Substituting the values we get:
P2 = (750 mmHg x 1.27 L x 448 K) / (0.75 L x 298 K)
P2 = 1504 mmHg
Therefore, the final pressure at a volume of 0.75 L and a temperature of 448 K is 1504 mmHg.
What is the pOH of a solution with an OH- ion concentration of 6.0e-4?
The correct answer is To find the pOH of a solution with an OH- ion concentration of 6.0e-4, we first need to use the relationship between pH and pOH:
pH + pOH = 14 Rearranging this equation, we get: pOH = 14 - pHWe can then use the relationship between pH and [H+] to find pH: pH = -log[H+] In this case, we are given the concentration of OH-, but we can use the relationship between [H+] and [OH-]: Kw = [H+][OH-] = 1.0e-14 Solving for [H+], we get: [H+] = Kw/[OH-] = 1.0e-14/6.0e-4 = 1.67e-11 M Substituting this into the equation for pH, we get: pH = -log(1.67e-11) = 10.78 Finally, we can use the first equation to find pOH: pOH = 14 - pH = 14 - 10.78 = 3.22Therefore, the pOH of a solution with an OH- ion concentration of 6.0e-4 is approximately 3.22.v.
To learn more about relationship click on the link below:
brainly.com/question/31248849
#SPJ1
FILL IN THE BLANK
In both fusion and fission, stability _______ as a result of the reaction.
Select one:
a) Increases
b) Decreases
c) Remains the same
Need help on this ASAP thank you!!
In both fusion and fission, stability decreases as a result of the reaction. In fusion, two smaller nuclei combine to form a larger nucleus, releasing energy in the process.
The resulting nucleus may be unstable and undergo radioactive decay, which can further release energy. In fission, a larger nucleus is split into smaller nuclei, also releasing energy. The resulting nuclei may also be unstable and undergo radioactive decay. In both cases, the process of splitting or combining nuclei releases energy, but it also reduces the overall stability of the resulting nuclei.
To know more about radioactive decay please refer:
https://brainly.com/question/1770619
#SPJ1
Based on the amounts of starting materials used, a cheimst calculates a possible yield of 216.4 g in a reaction. However, after isolating her purified product, she finds that she has only 199.6 g of products. What is her percent yield for this reaction?
The correct answer is The percent yield of a chemical reaction is a measure of the efficiency of the reaction. It is calculated by comparing the actual yield.
Which is the amount of product obtained in a reaction, to the theoretical yield, which is the amount of product that would be obtained if the reaction proceeded perfectly and no losses occurred. To calculate the percent yield in this case, we need to first determine the theoretical yield based on the amount of starting material used. The theoretical yield can be calculated using the balanced chemical equation and the stoichiometry of the reaction. Once the theoretical yield is determined, we can then use the formula for percent yield: Percent yield = (actual yield / theoretical yield) x 100% In this case, the chemist calculated a theoretical yield of 216.4 g based on the amounts of starting materials used. However, after isolating the purified product, she found that she only obtained 199.6 g of product. To calculate the percent yield, we can plug these values into the formula: Percent yield =[tex](199.6 g / 216.4 g) x 100% = 92.2%\\[/tex]Therefore, the percent yield for this reaction is 92.2%, which means that the reaction was quite efficient, but there were some losses or inefficiencies during the reaction or purification process. By calculating percent yield, chemists can evaluate the efficiency of a reaction and make adjustments to improve the process in future experiments.
To learn more about actual yield. click on the link below:
brainly.com/question/21925098
#SPJ1
A first-order reaction is 45% complete after
400 s. Calculate the rate constant of the
reaction?
Answer:
the rate constant of the reaction is approximately 0.0021 s^-1.
Explanation:
To calculate the rate constant of a first-order reaction, we can use the following equation:
ln([A]t/[A]0) = -kt
Where [A]t is the concentration of reactant at time t, [A]0 is the initial concentration of reactant, k is the rate constant, and t is time.
Given that the reaction is 45% complete after 400 s, we can assume that [A]t/[A]0 = 0.55 (since 100% - 45% = 55%). Plugging this value into the equation above, we get:
ln(0.55) = -k(400)
Solving for k, we get:
k = -ln(0.55)/400
k ≈ 0.0021 s^-1
A first-order reaction is 45% complete after 400 s. Therefore, 0.0021 s⁻¹ is the rate constant of the reaction.
What is rate constant?The chemical kinetics rate law, which connects the molecular concentration of reacting substances to reaction rate, uses the rate constant as a proportionality factor. The letter k in an equation designates it, which is also referred to as either the resultant rate constant and reaction rate coefficient.
The link among the molecular concentration of reactants with the rate for a chemical reaction is shown by the proportionality constant k. Utilising the molecular weights of each of the reactants with the sequence of the reaction, the rate constant can be calculated experimentally. As an alternative, the Arrhenius equation can be used to compute it.
ln([A]t/[A]0) = -kt
[A]t/[A]0 = 0.55
ln(0.55) = -k(400)
k = -ln(0.55)/400
k ≈ 0.0021 s⁻¹
Therefore, 0.0021 s⁻¹ is the rate constant.
To know more about rate constant, here:
https://brainly.com/question/20305871
#SPJ2
We wish to determine how many moles of barium
sulfate form when 50.0 mL of 0.250 M aluminum
sulfate reacts with excess barium nitrate.
3Ba(NO3)2(aq) + Al2(SO4)3(aq) → 3BaSO4(s) + 2AI(NO3)3(aq)
How many moles of Al2(SO4)3 are present
in 50.0 mL of 0.250 M Al₂(SO4)3?
mol Al₂(SO₂),
Enter
There are 0.0125 moles of Al₂(SO₄)₃ present in 50.0 mL of 0.250 M Al₂(SO₄)₃.
To determine how many moles of Al₂(SO₄)₃ are present in 50.0 mL of 0.250 M Al₂(SO₄)₃, we can use the following formula:
moles = concentration x volume
where concentration is in units of moles per liter (M), and volume is in units of liters (L).
First, we need to convert the volume from milliliters (mL) to liters (L):
50.0 mL = 50.0/1000 L = 0.0500 L
Next, we can plug in the values we know:
moles = 0.250 M x 0.0500 L
moles = 0.0125 mol
Therefore, there are 0.0125 moles of Al₂(SO₄)₃ present in 50.0 mL of 0.250 M Al₂(SO₄)₃.
Moles are a unit of measurement that is usually used in chemistry to express the quantity of a substance. As many atoms, molecules, or ions are present in 12 grams of pure carbon-12, it is the volume of a substance that includes that many of them.
Avogadro's number, 6.022 x 10²³ particles per mole, is the number of particles.
learn more about moles here
https://brainly.com/question/15356425
#SPJ1
How many moles of HCI are present in 50.0 mL of 2.0 M HCI?
pls help
Answer: 0.10
I'm bad at explaining but trust, I had the same question.
What is the mass of a sample of N2 gas, which has a pressure of 3 atm, at a temperature of 50 °C, in a volume of 0.6 L?
Explanation:
We can use the ideal gas law to calculate the mass of the N2 gas sample:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant (0.08206 L·atm/mol·K), and T is the temperature.
First, we need to convert the temperature to Kelvin:
T = 50 °C + 273.15 = 323.15 K
Now we can rearrange the ideal gas law to solve for the number of moles:
n = PV/RT
n = (3 atm)(0.6 L)/(0.08206 L·atm/mol·K)(323.15 K)
n = 0.0705 mol
The molar mass of N2 is 28.02 g/mol, so we can calculate the mass of the N2 gas sample:
mass = n × molar mass
mass = 0.0705 mol × 28.02 g/mol
mass = 1.98 g
Therefore, the mass of the N2 gas sample is approximately 1.98 g.
How many moles of each product would form if 1.00 mol of NH4NO3 reacts?
When 1.00 mol of NH4NO3 reacts, 1.00 mol of NH4+ ions and 1.00 mol of NO3- ions are produced.
The balanced chemical equation for the reaction between NH4NO3 and water can be written as:
NH4NO3 + H2O → NH4+ + NO3- + H2O
This reaction involves the dissociation of NH4NO3 into NH4+ and NO3- ions when it is dissolved in water.
Since we are given 1.00 mol of NH4NO3, and assuming that it is completely dissociated in water, we can calculate the number of moles of each product that will be formed.
For every 1 mol of NH4NO3, 1 mol of NH4+ and 1 mol of NO3- ions are formed. Therefore, we can say that:
1.00 mol of NH4NO3 will form 1.00 mol of NH4+ ions
1.00 mol of NH4NO3 will form 1.00 mol of NO3- ions
Since the reaction involves the dissociation of NH4NO3 in water, the number of moles of water formed is not taken into account.
Learn more about reaction here:
https://brainly.com/question/17434463
#SPJ1
4.The voltaic cell has with Pt/H+/H2 and Ag/AgC/Cl- half cells is a possible design for an electronic pH meter, in that the actual cell E depends on [H3O+].
(a) Write out (under each half cell) the electrode reactions, and give below the overall cell equation.
(b) Indicate with arrows the direction of motion of the ions and electrons as the cell reacts spontaneously.
(c) Mark the electrodes as + or – and cathode or anode.
(d) What is the standard cell potential, Eo?
Eo = _______________________
(e) Calculate the actual cell potential, E, if the unknown [H3O+] is 1.0 x 10-4 M.
E = _________________________
(f) If [H+] remains variable, then for this cell E = A + B.pH. What are the values of the Constants A and B?
A = ____________ , B = ______________
Answer:
(a) Electrode reactions:
Pt/H+/H2: 2H+(aq) + 2e- -> H2(g) (reduction)
Ag/AgCl/Cl-: AgCl(s) + e- -> Ag(s) + Cl-(aq) (reduction)
Overall cell equation: 2AgCl(s) + H2(g) -> 2Ag(s) + 2HCl(aq)
(b) Direction of motion of ions and electrons:
In the Pt/H+/H2 half-cell, hydrogen ions (H+) move towards the platinum electrode and accept electrons to form hydrogen gas (H2). In the Ag/AgCl/Cl- half-cell, silver ions (Ag+) move towards the silver chloride (AgCl) electrode and accept electrons to form silver (Ag) metal while chloride ions (Cl-) move away from the electrode. Electrons move from the hydrogen electrode to the silver electrode through the external circuit.
(c) Electrode labeling:
The Pt/H+/H2 electrode is the cathode (-) and the Ag/AgCl/Cl- electrode is the anode (+).
(d) Standard cell potential (Eo):
The standard cell potential can be calculated using the standard reduction potentials for each half-cell:
Eo(cell) = Eo(reduction, Ag/AgCl/Cl-) - Eo(reduction, Pt/H+/H2)
Eo(reduction, Ag/AgCl/Cl-) = +0.222 V (from standard reduction potential tables)
Eo(reduction, Pt/H+/H2) = 0 V (by definition)
Eo(cell) = +0.222 V - 0 V = +0.222 V
(e) Actual cell potential (E):
E(cell) = Eo(cell) - (0.0592 V / n) * log[H3O+]
where n is the number of electrons transferred in the balanced equation (2 in this case)
E(cell) = +0.222 V - (0.0592 V / 2) * log(1.0 x 10^-4 M)
E(cell) = +0.222 V - (0.0296 V) = +0.1924 V
(f) Values of constants A and B:
E(cell) = A + B.pH
At pH 7 (neutral), E(cell) = Eo(cell) = +0.222 V
Therefore, A = +0.222 V and B = -0.0592 V/pH
1. Making Slime: Experiment
Problem Question: Your problem question should include independent and dependent variables. One way to do this is to use this
sentence stem.
What is the effect of.
Hypothesis: Write a hypothesis for your experiment. One way to make sure that the hypothesis includes the independent and
dependent variables as well as your prediction of the results is to use the following sentence stem.
If
then
on
Experiment: What steps or methodology will you use to complete the experiment? You must include at least 4 steps.
Data: Record both qualitative and quantitative data. You may want to make a table and/or use descriptive words.
In your experiment, identify your independent variable and responding variable.
Answer:
Explanation:
Gather materials: clear glue, water, borax, food coloring, measuring cups and spoons, mixing bowl, and stirring utensil.
Create two batches of slime, keeping all variables constant except for the amount of borax used. In one batch, use 1 tablespoon of borax, and in the other batch, use 2 tablespoons of borax.
Mix the ingredients together in separate bowls until they reach the desired consistency.
Compare the consistency of the two slimes.
Data:
Qualitative data: Observations about the texture, color, and smell of the two batches of slime.
Quantitative data: Measurements of the amount of borax used in each batch and any other measurements deemed important for analyzing the consistency of the slime.
Independent variable: The amount of borax used in the slime recipe.
Dependent variable: The consistency of the slime.
Problem Question: What is the effect of varying the amount of borax solution on the consistency of slime?
Create a hypothesis?Hypothesis: If the amount of borax solution in the slime mixture is increased, then the consistency of the slime will become firmer.
Experiment Steps:
Gather the necessary materials, including glue, borax powder, water, and any desired additives (e.g., food coloring, glitter).Prepare different batches of slime by keeping the glue constant and varying the amount of borax solution. For example, make one batch with 1 teaspoon of borax solution, another with 2 teaspoons, and a third with 3 teaspoons.Mix each batch of slime thoroughly, ensuring that the borax solution is evenly distributed.Observe and record the consistency of each slime batch. Note its texture, stretchiness, and stickiness. You can use descriptive words such as runny, gooey, or stiff to describe the qualitative data.In this experiment, the independent variable is the amount of borax solution, as it is being varied to test its effect on the slime's consistency. The responding variable is the consistency of the slime, which is being observed and recorded as the dependent variable.
Learn more about borax solution at:
https://brainly.com/question/14724418
#SPJ2