How does the speed of molecules of a gas change when the gas is heated
Which species can act as an acid?
A. S0₂
B.
NH4+
C. CO2
D.
PO43-
I need help asap!!!!!!!!
Answer:
A
Explanation:
add 22 with the answers like A, 33+22=55
PLEASE HELP AS SOON AS POSSIBLE
Compare how entropy changes for the following two systems:
System A: A gas and a solid react to form a new solid product.
System B: Rubbing alcohol evaporates on the skin
In system A: A gas and a solid react to form a new solid product. The system entropy decreases.
In System B: Rubbing alcohol evaporates on the skin. Liquid alcohol is converted to gas by evaporation. So the system entropy increases.
What is Entropy?Entropy is a thermodynamic quantity measure the degree of disorder of a certain system.
Gases have larger entropy compared to liquids and which is larger than solids.
System A: When a gas convert to a solid, its entropy decreases because solids have less energy and entropy than solids.So, in system A: A gas and a solid react to form a new solid product. The system entropy decreases.System B: Any chemical reaction that increases the number of gas molecules also increases entropy.So, in System B: Rubbing alcohol evaporates on the skin. Liquid alcohol is converted to gas by evaporation. So the system entropy increases.Learn more about entropy here:
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Answer:
System A: The entropy decreases due to the solid having fewer moving particles than the gas .
System B: There is an increase in entropy. The change in the state of a liquid to a gas is an increase in entropy (disorder) because the particles of a gas are moving faster and forming more random arrangements than they are in the more condensed liquid state.
Explanation:
Describe how Fire Making undergo heat to light energy transformation.
As the combustible materials burn, some of the chemical energy is transformed into heat energy, and some are transformed into light energy. Light energy, also known as radiation or electromagnetic energy, is a type of kinetic energy that takes the form of visible light waves, such as the light from a match.
Complete the following solubility constant expression for SrCO3•
Refer to image for problem.
Thank you so much whoever can help <3 I appreciate quick responses
Answer:
[Sr2+][CO32-]
Explanation:
When this compound dissolves in water, it breaks up into Sr cations and CO3 anions. Due to the fact that the element Sr lies in group 2, and is a cation, we know that it can be represented by the expression - [Sr2+]. From this we can come up with the following expression for CO3 - [CO32-].
What is the best definition of
nucleus?
A. The nucleus is the outer shell of the atom.
B. The nucleus is the center of the atom.
C. The nucleus is the combination of several
Answer:
usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
Explanation:
please consider as brainlest if i helped you
usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
A basketball is pumped with air that is composed of three gases: hydrogen, oxygen, and
nitrogen. The three gases have partial pressures of 1.00 atm, 0.29 atm, and 0.99 atm.
What is the total pressure of the gas in the basketball?
Answer:
2.28 atm
Explanation:
According to Dalton's law of partial pressures the total pressure is equal to the sum of all of the partial pressures. Basically, just add the individual partial pressures to get the total pressure.
1.00+.29+.99=2.28atm total pressure
Help me please and thank you
Answer:
a
Explanation:
one is Na other is Cl
how to calculate amount of copper obtained from a reaction
Answer:
22g of copper?
Explanation:
Which of the following is the correct balanced equation for the breakdown of carbonic acid (H2CO3) into water and carbon dioxide? A. H2CO3 H20 + 3CO2 B. H2CO3 → H2O + CO2 C. 2H2CO3 + H2O + 3C02 D. 2H2CO3 - 2H20 + 3C02
If the cell potential is negative, which electrode is connected to the anode?.
Answer: Heyo Kenji Here! Here's your answer- In addition, since the external battery source is what drives the electrons through the circuit, the electrodes will match the positive and negative terminal of the battery. While the anode remains the site of oxidation, it becomes the positive terminal, and the cathode becomes the negative terminal.
Explanation: Hope this helps!
Have a nice day!
- Kenji ^^
Answer: In a galvanic (voltaic) cell, the anode is considered negative and the cathode is considered positive. This seems reasonable as the anode is the source of electrons and cathode is where the electrons flow. However, in an electrolytic cell, the anode is taken to be positive while the cathode is now negative.
Explanation: I hope this helps!
How many grams of NaF are needed to make 6.3 liters of a 3.6
molar solution?
Answer:
9.7 × 10² g NaF.
Explanation:
Molarity is defined by the amount of solute (mols) over the volume of solution (liters):
[tex]\displaystyle \text{Molarity} = \frac{\text{mols solute}}{\text{L solution}}[/tex]
We want to create 6.3 liters of a 3.6 molar solution of NaF.
Solve for the amount of NaF necessary:
[tex]\displaystyle \begin{aligned} (3.6\text{ M}) & = \frac{\text{ mol NaF}}{6.3\text{ L}} \\ \\ \text{mol NaF} & = 23 \text{ mol}\end{aligned}[/tex]
Therefore, about 23 moles of NaF is required.
Convert from moles to grams. The molecular weight of NaF is 41.99 g/mol:
[tex]\displaystyle 23\text{ mol NaF} \cdot \frac{41.99\text{ g NaF}}{1\text{ mol NaF}} = 9.7\times 10^2\text{ g NaF}[/tex]
Therefore, about 970 grams of NaF is needed to create the solution.
Only smart people can answer 50points
We need M2
25(0.5)=100M212.5=100M2M2=12.5/100M2=0.125MIdentify the lewis acid in this balanced equation: upper a g superscript plus, plus 2 upper n upper h subscript 3 right arrow upper a g (upper n upper h subscript 3) subscript 2 superscript plus. ag nh3 ag(nh3)2
The equation that has been the representation of the net ionic equation has been Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O.
What is the balanced equation?
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.
The balanced chemical equation for the reaction has been:
[tex]\rm Mg(OH)_2+2HNO_3-- > Mg(NO_3)_2+H_2O[/tex]
The net ionic equation has been given as the ionic form of the reactants and product that has been formed in the reaction. The ions same on the product and reactant side of the equation has been eliminated in the net ionic equation.
The net ionic equation for the given chemical reaction has been:
[tex]\rm Mg^{2+}+OH^++2H^++2NO^{-}_3-- > Mg^{2+}+NO^{-}_3+2H_2O\\\\OH^{-}+2H^+-- > 2H_2O[/tex]
The equation that has been the representation of the net ionic equation has been Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O. Thus, option A is correct.
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Answer:
A on edge
Explanation:
Just trust
50 points Acids & Bases
please help me children
Answer:
See below ↓↓↓↓
Explanation:
1)
a)
HCl + NaOH → NaCl + H₂Ob)
HNO₃ + KOH → KNO₃ + H₂Oc)
Mg(OH)₂ + H₂CO₃ → MgCO₃ + 2H₂Od)
Al(OH)₃ + 3HCl → AlCl₃ + 3H₂OA gas has a temperature of 14 degrees C and a volume of 4.5 L. If the temp is raised to 29 degrees C and the pressure is not changed, what is the new volume of the gas
Answer:
V1/T1 = V2/T2 (Charles' Law)
T is in Kelvin. Celsius temp plus 273.15 = K
T1 = 14 +273
= 287 K
T2 = 29 + 273
= 303 K
4.5 / 287 = V2 / 303
V2 = 4.75 L
= 4.8 L
why would scientists use a spectrometer in space.
A. To study the chemical composition of the surface of a planet
B. To detect the birth and death of distant start and galaxies
C. To convert light from stars into usable energy for humans
D. To maintain a constant air supply on board a space shuttle
Answer:
A. To study the chemical composition of the surface of a planet
Explanation:
Strictly speaking, a spectrometer is any instrument used to view and analyze a range (or a spectrum) of a given characteristic for a substance (for example, a range of mass-to-charge values as in mass spectrometry), or a range of wavelengths as in absorption spectrometry like nuclear magnetic radiation spectroscopy
-hope this helps!
How are birds and mammals characterized?
Answer:
Vertebrates: both birds and mammals are vertebrates, which means that they have backbones.
Explanation:
Define the term oxide
Answer: is the chemical compound that contains one oxygen atom and one other element in it chemical formular
Explanation:
Oxide - is a binary compound of oxygen with a more electropositive element or group
Hope this helps :))
balance fe+4h2o=fe2o3+h2
Answer:
2Fe+3H20=Fe203+3H2
Explanation:
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Based on temperature changes, the phase changes that occur in water is from a solid at A to a liquid at B, and from liquid a B to gas at C.
What is change of state?Change of state is the process whereby a substance changes its state of matter from one form to another as as result of heat changes.
In the graph shown above, water exists in three states at different points.
Water exists as a solid at A Water exists as a liquid at BWater exists as a gas at C.Therefore, the phase changes that occur in water is from a solid at A to a liquid at B, and from liquid a B to gas at C.
Learn more about change of state at: https://brainly.com/question/18372554
What is formed when acids and bases come together in neutralization reactions?.
Answer:
Water and Salts
Explanation:
Because a neutralization reaction, which results in the formation of salt and water, occurs when an acid and a base react with one another. The H + ions from the acid and the OH - ions from the base combine to form water. As a result of the reaction, a solution with a neutral pH (pH = 7) is produced as the strong acids and strong bases completely dissociate.
Please help me answer this question about fullerenes. 30 points available and brainliest.
Answer: B.
Hope this helps! :)
Mark me brainliest please.
Answer:
Large hollow-shaped molecules of hexagonal carbon rings
Explanation:
looks like a soccer ball
wikipedia
Arrange the following measurements in order from least to greatest.
5 micrograms
5 milligrams
5 kilograms
5 grams
<
<
<
5 micrograms then 5 milligrams than 5 g then 5 kg
Lars is balancing equations with his study group. he is unsure about one equation because each member of the study group came up with a different answer. which is the proper way to balance the equation ca(oh)2 h3po4 → ca3(po4)2 h2o? ca(oh)2 h3po4 → ca3(po4)2 6h2o 3ca(oh)2 2h3po4 → ca3(po4)2 6h2o 3ca(oh)2 2h3po4 → ca3(po4)2 3h2o ca(oh)2 2h3po4 → ca3(po4)2 6h2o
The proper way to balancing the given equation is 3Ca(OH)₂+2H₃PO₄→Ca₃(PO₄)₂ +6H₂O
What is balanced equation?Balanced equations are those reactions in which each atom of reactants and products are present in same quantity on both sides of the equation.
Given chemical reaction is:
Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + H₂O
Let we discuss each given reaction to get the perfectly balanced equation:
Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + 6H₂OIn the above reaction number of hydrogens, calcium as well as of oxygens are not equal so that it is an unbalanced equation.
3Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 6H₂OIn the above equation all atoms are present in equal amount on both sides of the reaction, so that it is a balanced equation.
3Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 3H₂OIn the above reaction number of oxygen and hydrogen atoms are not equal so that the given equation is an unbalanced one.
Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 6H₂OIn the above freaction all atoms are unequal so that given equation is an unbalanced equation.
Hence balanced equation is 3Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 6H₂O.
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Оа
Corona
Oь
Prominence
Ос
Solar flare
Od
Sunspot
Answer:A solar flare is an intense burst of radiation coming from the release of magnetic energy associated with sunspots. Flares are our solar
Explanation:
can heat energy be converted into chemical energy
What is the oxidation number for s in the compound so3? (recall that o has an oxidation number of –2.) 0 2 4 6
The oxidation number for sulphur (S) in the given compound sulphur trioxide (SO₃) is +6.
What is the oxidation number?Oxidation number of any element is define as the number of exchangeable electrons from the outermost shell of an element.
For the given compound SO₃ no charge is present on the whole molecule and oxidation state of oxygen atom is -2, and let we assume that the oxidation state of sulphur atom is x and we calculate for x as:
x + 3(-2) = 0
x - 6 = 0
x = +6
Hence the oxidation state of atom is +6.
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The answer is D: 6+
Worked for me on EDGE 2023
Look at the reaction below. upper h subscript 2 upper s upper o subscript 4 (a q) plus upper c a (upper o upper h) subscript 2 (a q) right arrow upper c a upper s upper o subscript 4 (a q) plus 2 upper h subscript 2 upper o (l). which substance is the base in the reaction? 2h2o (l) h2so4 (aq) caso4 (aq) ca(oh)2 (aq)
In the given reaction, the substance that is the base of the reaction is [tex]CaSO_4[/tex]. The correct option is C.
What is a base?The base is a slippery liquid that is bitter and turns red litmus paper to blue.
Bases react with acids to form salts.
Then bases have pH above 7.
Examples of bases are calcium carbonate, sodium hydroxide, etc.
Thus, the correct option is C.
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Answer:
D. Ca(OH)2 (aq)
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!