The molarity (M) of the solution is then given as,M = n / V = 0.580 moles of H2C2O4/L
Oxalic acid occurs as the potassium or calcium salt in many plants, including rhubarb and spinach. Aqueous solution of oxalic acid is 0.580 M H2C2O4. The density of the solution is 1.022 g/ml. To find the molar concentration, we need to know the formula relating the number of moles of solute to the volume of the solution.Let us first convert the density of the solution to grams per liter.1.022 g/ml = 1022 g/LThe molarity (M) is defined as the number of moles of solute (n) dissolved per liter of solution (V).M = n / VThe number of moles of solute (n) is obtained by multiplying the volume of the solution (V) with the molar concentration (C).n = C x VSubstitute the known values and calculate the number of moles of H2C2O4.n = 0.580 M x 1 L = 0.580 moles of H2C2O4/L
The molarity (M) of the solution is then given as,M = n / V = 0.580 moles of H2C2O4/LNote: It is important to remember to include the units in your final answer.
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Which substance is the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide according to the following chemical equation: 25() + 3 O2(g) + 4 NaOH(aq) → 2 Na2SO4(aq) + 2 H2O(l) 049) ONaOH(ag) O S(s) None of these substances is the limiting reactant
The limiting reactant is Sulphur, according to the chemical reaction given in the question.
Let's take the balanced chemical reaction in the question
2S + 3O₂ + 4NaOH → 2Na₂SO₄ + 2H₂O
Here,
We have to identify the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide.
First, we need to calculate the moles of each substance, and then we can find out the limiting reactant.
Let's do it one by one.
Mole of sulphur (S) = 2 g/32 g/mol = 0.0625 moles
Moles of Oxygen (O2) = 3 g/32 g/mol = 0.09375 moles
Moles of Sodium Hydroxide(NaOH) = 4g/40g/mol = 0.1 moles
Now, we have to compare the number of moles of each substance to find out the limiting reactant.
Here we can see that the number of moles of sulphur (S) is the least among all the reactants, i.e., 0.0625 moles.
Hence, the limiting reactant is sulfur (S).
Therefore, the correct answer is "sulphur."
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write the reaction that produces carbon dioxide in the separatory funnel in the workup of the reaction. g
One common reaction that produces carbon dioxide in organic chemistry workup is the reaction between sodium bicarbonate (NaHCO₃) and an acid.
When an acidic solution is added to a mixture containing sodium bicarbonate, carbon dioxide gas is produced as a result of the following reaction:
NaHCO₃ + H+ → Na+ + CO₂ + H₂O
The carbon dioxide gas will then bubble out of the mixture and can be collected in a separate container or released into the air.
In a separatory funnel workup, this reaction may be used to remove excess acid from an organic reaction mixture. The mixture is first extracted with a suitable organic solvent, and then an aqueous solution of sodium bicarbonate is added to the separatory funnel. The acidic components in the mixture will react with the sodium bicarbonate to produce carbon dioxide, which will bubble out of the mixture and can be released through the stopcock
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A student exposed r-1-bromo-2-propanol to sodium hydroxide, isolated an optically active product, and collected the proton nmr below. what is the structure of the compound that the student isolated?
The student obtained an optically active product after exposing r-1-bromo-2-propanol to sodium hydroxide. The proton NMR of the product is also provided.
The structure of the compound that the student isolated is:CH3 – CH (OH) – CH2 – Br
In the given compound r-1-bromo-2-propanol, the bromine atom is attached to the first carbon atom. When this compound is treated with sodium hydroxide, the hydroxide ion attacks the carbon atom attached to the bromine atom and forms a negatively charged oxygen atom.This negatively charged oxygen atom further attracts the proton of the adjacent carbon atom (second carbon atom). After the transfer of a proton, the negatively charged oxygen atom gets neutralized and an alkoxide ion is formed. This alkoxide ion further attacks the third carbon atom and the compound is formed.In the compound obtained, there is no plane of symmetry or center of symmetry. This makes the compound optically active.
Further, the proton NMR shows the presence of a singlet at chemical shift 1.1 ppm due to the presence of three equivalent methyl groups. The presence of a broad singlet at chemical shift 3.7 ppm is due to the presence of –OH group. The singlet at chemical shift 4.2 ppm is due to the presence of –CH2 group.The structure of the compound that the student isolated is CH3 – CH (OH) – CH2 – Br.
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1. the pinakbet that your mother cooks is an example of a _
A. solution B. mixture C. solvent D. solute
2. which is NOT a characteristic of heterogeneous mixture?
A. the substances are evenly mixed
B. the substances are completely dissolved in water
C. the substances that are mixed cannot be identified
D. the substances can still be identified from the mixture
Answer:
1. Ans: B
Explanation: Pinakbet, which contains vegetables such as eggplants and kalabasa, are physically combined. Therefore, the pinakbet is an example of a mixture
2. Ans: A
Explanation: Heterogenous are different building blocks that are mixed UNEVENLY.
a chemist determined by measurements that moles of magnesium participated in a chemical reaction. calculate the mass of magnesium that participated in the chemical reaction.
Answer : The molar mass of magnesium is 24.305 g/mol
To calculate the mass of magnesium that participated in the chemical reaction, you need to know the number of moles of magnesium and the molar mass of magnesium. The molar mass of magnesium is 24.305 g/mol. Multiply the number of moles of magnesium by the molar mass of magnesium to calculate the mass of magnesium that participated in the chemical reaction.
For example, if you were given that the number of moles of magnesium is 0.25 moles, then you can calculate the mass of magnesium by multiplying 0.25 moles by 24.305 g/mol. This gives a result of 6.076 g of magnesium that participated in the chemical reaction.
To sum up, calculating the mass of magnesium that participated in the chemical reaction requires knowing the number of moles of magnesium and the molar mass of magnesium. The molar mass of magnesium is 24.305 g/mol, and you can calculate the mass of magnesium that participated in the chemical reaction by multiplying the number of moles of magnesium by the molar mass of magnesium.
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based on results presented in the passage, researchers hoping to alter the appearance of sgbp while maintaining its function as a cp providing a colored appearance would most logically choose to mutate which sgbp residue?
The nucleotide sequence of an organism's genome, that of a virus, extrachromosomal DNA, or other genetic components can change permanently in a process known as mutation.
Any alteration to a cell's DNA sequence. Mistakes in cell division can result in mutations, as can exposure to environmental DNA-damaging substances.
Gene mutations can be divided into two categories: small-scale mutations and large-scale mutations.
Appearance Alteration is the capacity to modify another person's skin, hair, and vocal chords (also known as adaptive appearance manifestation).
The genes that encode our pigment's sensitivity to color can multiply themselves throughout time. The additional copies are susceptible to mutations that change the range of wavelengths they can absorb.
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Which of the following electronic transitions for hydrogen would result in the emission of a quantized amount of energy?
A. n = 1 → n = 2
B. n = 2 → n = 3
C. n = 5 → n = 4
D. n = 4 → n = 6
A.
i had this question and i got it right
what minimal photon energy in ev is required to eject an electron from the ground state of a doubly ionized lithium
The minimum photon energy required to eject an electron from the ground state of a doubly ionized lithium is 8.62 eV.
This is due to the fact that ionization energy of doubly ionized lithium is 8.62 eV, which means that the minimum amount of energy required to remove an electron from the atom is 8.62 eV.
This is the amount of energy that the incoming photon must have in order to eject an electron from the ground state of a doubly ionized lithium atom.
In other words, the photon must possess at least 8.62 eV of energy to remove the electron from the atom.
This is why a photon with energy of 8.62 eV or more is required to eject an electron from the ground state of a doubly ionized lithium atom.
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How many grams are in 87g of potassium bromide?
The number of mole present in 87 grams of potassium bromide, KBr is 0.731 mole
How do i determine the number of mole present?We'll begin our calculation by obtaining the molar mass of potassium bromide, KBr. Details below:
Molar mass of ptassium, K = 39 g/molMolar mass of bromine, Br = 80 g/molMolar mass of potassium bromide, KBr =?Molar mass of potassium bromide, KBr = K + Br
Molar mass of potassium bromide, KBr = 39 + 80
Molar mass of potassium bromide, KBr = 119 g/ mol
Finally, we shall determine the number of mole present. Details below:
Mass of potassium bromide, KBr = 87 grams Molar mass of potassium bromide, KBr = 119 g/mol Mole of potassium bromide, KBr =?Mole = mass / molar mass
Mole of potassium bromide, KBr = 87/ 119
Mole of potassium bromide, KBr = 0.731 mole
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Complete question:
How many moles are in 87g of potassium bromide?
lactate and pyruvate are byproducts of group of answer choices anaerobic glycolysis aerobic glycolysis anaerobic oxidation of fats creatine
Lactate and pyruvate are byproducts of anaerobic glycolysis. Anaerobic glycolysis is the metabolic process of breaking down glucose into energy when oxygen is not available.
During anaerobic glycolysis, glucose is broken down into pyruvate in the absence of oxygen, which is then converted into lactate as a means of regenerating NAD⁺ so that glycolysis can continue. This process is commonly used by muscle cells during intense exercise when oxygen delivery cannot keep up with the energy demand. In contrast, during aerobic glycolysis, glucose is broken down into pyruvate in the presence of oxygen, which then enters the mitochondria to be further metabolized in the citric acid cycle.
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Convert 7.41 x 1024 molecules of C2H2 to grams
Answer:
To convert molecules of C2H2 to grams, we need to use the molar mass of C2H2, which is 26.04 g/mol.
First, we need to calculate the number of moles in 7.41 x 10^24 molecules of C2H2:
7.41 x 10^24 molecules / 6.022 x 10^23 molecules/mol = 12.31 mol
Then, we can use the formula:
mass = moles x molar mass
mass = 12.31 mol x 26.04 g/mol = 320.4624 g
Therefore, 7.41 x 10^24 molecules of C2H2 is equivalent to 320.4624 grams.
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what is one low-tech method currently available to actively remove co2 from the air?
The one low-tech method that is currently available to actively remove [tex]CO_2[/tex] from the air is afforestation.
Afforestation is the process of establishing a forest or stand of trees in an area where there was no forest. It is a type of forestation that involves planting trees in an area where there was no forest before. The process includes selecting an area, planting tree saplings, and nurturing them to maturity, allowing for effective CO2 removal over time.
The practice of afforestation has been used as a tool to combat climate change and mitigate the effects of global warming. The trees absorb [tex]CO_2[/tex] from the atmosphere and release oxygen through photosynthesis.
Therefore, afforestation is an effective way to remove [tex]CO_2[/tex] from the atmosphere.
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How many liters does one mole of gas occupy at STP?
At STP, one mole (6.02 × [tex]10^{23}[/tex] representative particles) of any gas occupies a volume of 22.4 L . A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atm).
Draw the sun and label the 4 layers from middle to the surface.
The layers of the sun can be seen in the image attached.
What are the layers of the sun?The sun is composed of several layers, including:
Core: The innermost layer of the sun where nuclear fusion takes place. The temperature in the core is about 15 million degrees Celsius.
Radiative Zone: This layer is between the core and the convection zone. Energy produced in the core is transported through the radiative zone by photons.
Convection Zone: The outermost layer of the sun's interior where hot gas rises and cooler gas sinks. The energy produced in the core is carried to the surface by convection.
Photosphere: The visible surface of the sun where most of the sun's light is emitted. The temperature of the photosphere is around 5,500 degrees Celsius.
Chromosphere: A thin layer above the photosphere that emits a reddish glow during solar eclipses. The temperature of the chromosphere ranges from 4,000 to 10,000 degrees Celsius.
Corona: The outermost layer of the sun's atmosphere, extending millions of kilometers into space. The temperature of the corona is extremely high, around 1 to 3 million degrees Celsius.
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the specific heat of plastic is 50 times greater than the specific heat of lead, 10 times greater than the specific heat of stone, and 1.5 times greater than the specific heat of water. if the samples of plastic, lead, stone, and water have identical masses and identical starting temperatures, and are given identical increases in energy of 1,000 j, which sample will end up with the highest temperature?
The substances that is going to end up with the highest temperature in the list is water.
How does heat capacity affect temperature rise?Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius or one Kelvin. It is a measure of the substance's ability to store heat. The greater the heat capacity of a substance, the more heat energy it can absorb before its temperature rises significantly.
When heat is added to a substance, the temperature of the substance increases. The amount by which the temperature increases depends on the amount of heat added and the heat capacity of the substance.
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Calculate the number of moles o2 that would be produced if 1. 62 mol of H2O2 were to undergo decomposition
0.81 moles of O2 would be produced if 1.62 moles of H2O2 were to undergo decomposition
The balanced chemical equation for the decomposition of hydrogen peroxide (H2O2) is:
2 H2O2 → 2 H2O + O2
This means that for every 2 moles of hydrogen peroxide, 1 mole of oxygen gas is produced. So to calculate the number of moles of O2 produced when 1.62 moles of H2O2 decompose, we need to use a proportion:
2 mol H2O2 : 1 mol O2 = 1.62 mol H2O2 : x mol O2
where "x" is the number of moles of O2 produced.
To solve for "x", we can cross-multiply and simplify:
2 mol H2O2 * x mol O2 = 1 mol O2 * 1.62 mol H2O2
2x = 1.62
x = 0.81
Therefore, 0.81 moles of O2 would be produced if 1.62 moles of H2O2 were to undergo decomposition.
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how many electrons does cl want to gain? hint: how many are gained to form a stable noble gas electron configuration, ns2 np6 (octet rule)?
Chlorine (Cl) is a nonmetal, meaning it has the tendency to gain electrons to achieve the electron configuration of a noble gas. The noble gas electron configuration of the nearest noble gas, argon (Ar), is 1s2 2s2 2p6 3s2 3p6, with a total of 18 electrons.
Chlorine has 7 valence electrons, meaning it needs 1 more electron to achieve a stable noble gas electron configuration. Therefore, chlorine wants to gain 1 electron to achieve a stable noble gas configuration.
In terms of bonding, chlorine can either gain 1 electron to form an anion with a 1- charge or it can share electrons with another atom to form a covalent bond. Chlorine most commonly forms a single covalent bond with another atom, such as hydrogen, to form hydrogen chloride (HCl). In this case, both atoms share electrons to form a stable molecule.
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fluoride ion is added to drinking water at low concentrations to prevent tooth decay. what mass of sodium fluoride (naf) should be added to 750 l of water to make a solution that is 1.5 ppm in fluoride ion?
In order to make a solution that is 1.5ppm in fluoride ion using sodium fluoride (NaF), 750L of water needs to be added to 0.22g of NaF.
Mass of NaF (g) = Concentration of F (ppm) x Volume of Water (L) / 1,000,000.
NaF mass = 1.5ppm x 750L / 1,000,000.
Since the atomic weight of NaF is 41.99, 0.22g is equivalent to 0.00518mol NaF.
The molarity (M) of the solution,
Molarity (M) = Moles of Solute (mol) / Volume of Solution (L)
Molarity 0.00518mol / 750L = 0.000068M.
Therefore, 0.22g of NaF should be added to 750L of water to make a solution that is 1.5ppm in fluoride ion.
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which three acids are used during this laboratory? give names and formulas for each. also indicate whether each acid is weak or strong and whether each acid is an oxidizing acid. acid formula acid name strong or weak? oxidizing or not? 1. 2. 3.
In this laboratory, the following three acids are used: Hydrochloric acid (HCl) with a formula of HCl, Sulfuric acid (H2SO4) with a formula of H2SO4, and Nitric acid (HNO3) with a formula of HNO3.Acids are known to be oxidizing agents, meaning that they are capable of accepting electrons to reduce other species.
Strong acids are those that completely dissociate into their constituent ions in aqueous solution. Hydrochloric acid, sulfuric acid, and nitric acid are all strong acids.
Here are the acids used during this laboratory: Acid Formula Name Strong or weak? Oxidizing or not?
1. (HCL)Hydrochloric acid Strong (Yes) 2. (H2SO4) Sulfuric acid Strong (Yes) 3. (HNO3) Nitric acid Strong (Yes) Acids are used in various laboratory experiments due to their unique chemical and physical properties.
They are used as reactants in many chemical reactions, as solvents for various compounds, and as catalysts for several reactions, among other applications.
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when the temperature of a rigid hollowsphere containing 685 l of helium gasis held to 621 k, the pressure of the gasis 1 kpa. how many moles ofhelium does the sphere contain?
Answer:
610 k because is the hollwsphere is the gasis and 1 kpa of helium
the mass of a single atom of an element which has only one stable isotope is 1.79*10^-22 grams. what is the atomic weight of the element
The atomic weight of the element is 1.79 × 10-22 grams
The atomic weight of an element is the average mass of its atoms relative to the mass of an atom of carbon-12, which is defined as 12.0000 atomic mass units (amu).
Since the element has only one stable isotope, its atomic weight is equal to the mass of a single atom of the element in amu.
Converting the given mass of a single atom from grams to amu:
1.79 x 10^-22 g x (1 amu / 1.66054 x 10^-24 g) = 1.079 amu
Therefore, the atomic weight of the element is 1.079 amu.
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Two paths in a park intersect so that one of the angles at the intersection is 75°. What are the three other angle measurements formed by the intersection? A. 15°, 75°, 175° B. 65°, 105°, 135° C. 75°, 105°, 105° D. 75°, 115°, 115°
in the solidifcation process the production of metallic slabs or ingots is known as the process of turning the metallic slabs or ingots into useful shapes is known as
The process of turning metallic slabs or ingots into useful shapes is known as "hot working" or "hot forming".
Hot working is a metalworking process where metals are shaped when they are above their recrystallization temperature. This process is usually done after a metal has been solidified from its molten state. It involves the application of force to change the shape of the metal, usually by compressing, drawing, forging, or extruding.
The temperature used during hot working can vary depending on the type of metal, but typically it must be at least half of the metal's melting point temperature. By hot working, the metal can be formed into various shapes, including thin sheets, rods, and tubes.
In the hot working process, the metal is heated until it reaches the recrystallization temperature and then deformed by mechanical means, such as hammering or rolling. The metal is then cooled down, either slowly or rapidly, depending on the required properties of the metal. Rapid cooling will increase the strength of the metal but also make it brittle, while slower cooling will give the metal more ductility. During cooling, some of the metal grains are recrystallized, leading to a homogeneous microstructure.
Hot working is an important process for many metal fabrication industries, including automotive, aerospace, and construction. It is used to create metal parts and components with superior strength and ductility, as well as for creating metal artworks or sculptures. The process is also widely used in metal recycling, where it is used to reshape and reform metals from their original form. Hot working can be a complex process and is typically done by highly skilled metalworkers.
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what causes the difference between ruby and corundum? choose one: a. impurities in the mineral b. formation pressure c. formation temperature d. mineral structure
The difference between ruby and corundum is caused by impurities in the mineral.
Ruby is a variety of the mineral corundum, where corundum itself is composed of aluminum oxide. The addition of trace elements such as chromium, titanium, and iron can turn a corundum into ruby.
The different impurities give the ruby its characteristic red color, while corundum remains colorless.
Ruby and corundum form in different conditions. Ruby typically requires higher pressure and temperatures than corundum.
The pressure of the Earth’s mantle helps the aluminum oxide and trace elements combine to form ruby, while corundum forms at lower pressures. Corundum can also form at higher temperatures and pressures, but this is less common.
Finally, the structure of the two minerals is different. Ruby has a trigonal structure, while corundum has an orthorhombic structure. The different impurities, pressures, and temperatures combine to create the two distinct minerals.
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what metal hydride reducing agent is used in this experiment? what product would be formed if catalytic hydrogenation with h2 were used?
The metal hydride reducing agent used in this experiment is sodium borohydride (NaBH₄).
If catalytic hydrogenation with H2 were used, the product would be an alkane with a double bond reduced to a single bond.
Sodium borohydride (NaBH₄) is a strong reducing agent capable of reducing aldehydes and ketones to their corresponding alcohols. It works by donating protons to the carbon-oxygen double bond, leading to the formation of an alkoxide intermediate.
The alkoxide is then reduced to the corresponding alcohol by hydrogen transfer from the hydride ion. Catalytic hydrogenation with H₂ will reduce the double bond to a single bond, producing an alkane product.
This process is used to produce a range of organic products in the laboratory, and is a very useful tool in organic synthesis.
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tungsten has a radius of 141 pm and crystallizes in a body-centered cubic structure. what is the edge length of the unit cell?
Answer: The edge length of the unit cell for tungsten is 0.548 nm.
Tungsten has a radius of 141 pm and crystallizes in a body-centered cubic structure.
The edge length of the unit cell can be calculated as follows:
Edge length of a body-centered cubic unit cell
(a) = √3 × 4r/3, where r is the radius of the atom.
Given, tungsten has a radius of 141 pm.
Thus, a = √3 × 4 × 141 pm / 3
= √3 × 564 pm / 3
= 1.417 × 10^-7 m / pm × √3 × 564
= 0.316 nm × 1.732
= 0.548 nm
The edge length of the unit cell for tungsten is 0.548 nm.
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Prepwork: **Find the mass of a sample of CCl4 with 5.90 x 1020 particles.
0.1503 grams is the approximate mass of the CCl4 sample.
Determining the mass of a particle using Avogadros numberWe can use Avogadro's number to solve this problem:
1 mole of any substance contains 6.02 x 10^23 particles
Therefore, the number of moles of CCl4 in the sample is:
5.90 x 10^20 particles / 6.02 x 10^23 particles per mole = 0.000978 moles
The molar mass of CCl4 is approximately 153.82 g/mol. Therefore, the mass of the sample is:
0.000978 moles * 153.82 g/mol = 0.1503 g
Therefore, the mass of the sample of CCl4 with 5.90 x 10^20 particles is approximately 0.1503 grams.
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acqeous hydrocloric acid reacts with sodium hydroxide to prodcue acqueous sodium chloride and liquid water. what is the theoretical yield of water formed from the reaction of 34.3 g of hyrochloric acid and 72.6 g of sodium hydroxide
The theoretical yield of water formed from the reaction of 34.3 g of hydrochloric acid and 72.6 g of sodium hydroxide is 16.9 g.
The balanced chemical equation of the reaction can be written as follows:
HCl + NaOH → NaCl + H₂O
The reactants, hydrochloric acid (HCl) and sodium hydroxide (NaOH), are combined in a 1:1 mole ratio. This means that for every mole of HCl, one mole of NaOH is necessary to produce one mole of water and one mole of sodium chloride.
The molar mass of HCl and NaOH is 36.5 g/mol and 40.0 g/mol, respectively. Dividing their mass with their respective molar mass, we will have the number of moles of each reactant.
moles HCl = 34.3 g / 36.5 g/mol = 0.94 mol
moles NaOH = 72.6 g / 40.0 g/mol = 1.815 mol
Therefore, 34.3 g of HCl is equivalent to 0.94 moles, and 72.6 g of NaOH is equivalent to 1.82 moles.
Since these are in a 1:1 mole ratio, this reaction should produce 0.94 moles of water. The molar mass of water is 18.0 g/mol, and thus the theoretical yield of water produced is:
mass = moles x molar mass = 0.94 mol x 18 g/mol = 16.9 g.
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PLEASE HELPPPP asapppppppppp
What is the balanced chemical
reaction for the synthesis of
nitrogen with hydrogen?
A. N₂ +H₂ → NH
B. N₂ + 2H₂ → 2NH3
C. 3N₂ + H₂ → 2NH3
D. N₂ + 3H₂ → 2NH3
The balanced chemical reaction for the synthesis of hydrogen with nitrogen is for the production of ammonia. This process is called Haber process. Option D is the correct answer.
What is Haber process?The Haber process is a chemical process that is used to produce ammonia (NH₃) from nitrogen (N₂) and hydrogen (H₂) gases. The process was developed by German chemist Fritz Haber in 1909 and is also known as the Haber-Bosch process.
The process involves the reaction of nitrogen and hydrogen in the presence of an iron catalyst and high pressure and temperature. The reaction is exothermic, releasing a large amount of heat. The Haber process is represented by the given balanced equation:
N₂ + 3H₂ → 2NH₃
The ammonia produced by the Haber process is a key component in the production of fertilizers and is also used in the manufacture of a wide range of other products, including explosives, dyes, and cleaning agents.
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