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18 Cards in this Set

  • Front
  • Back
The study of matter and changes in matter best describes the science of...

A. Biology
B. Physics.
C. Mictrobiology
D. Chemestry
D. Chemestry
Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions.

A. Qualitative Analysis
B. Entropy
C. Chemical Kinetics
D. Stoichiometry
D. Stoichiometry
Which of the following would be investigated in reaction stoichiometry?

A. The masses of hydrogen and oxygen in water.
B. The amount of energy released in chemical reactions.
C. The mass of potassium required to produce a known mass of potassium chloride.
D. The types of bonds that break and form when acids react with metals.
C. The mass of potassium required to produce a known mass of potassium chloride.
Which of the following would NOT be studied in the branch of chemistry called stoichiometry?

A. The mole ratio of aluminum and chlorine in aluminum chloride.
B. The amount of energy required to break the ionic bonds in calcium fluoride.
C. the mass of carbon produced with a known mass of sucrose decomposes.
D. The number of moles of hydrogen that react completely with a known quantity of oxygen.
B. The amount of energy required to break the ionic bonds in calcium fluoride.
The balanced chemical equation allows one to determine the...

A. Mole ratio of any two substances in the reaction.
B. Energy released in the reaction.
C. Electron configuration of all elements in the reaction.
D. Mechanism involved in the reaction.
A. Mole ratio of any two substances in the reaction.
The coefficients in a chemical equation represents the...

A. Masses, in grams, of all reactants and products
B. Relative numbers of moles of reactants and products.
C. Number of atoms in each compound in a reaction.
D. Number of valence electrons involved in the reaction.
B. Relative numbers of moles of reactants and products.
Each of the four types of reaction stoichiometry problems requires using a...

A. Table of bond energies.
B. Chart of electron configurations.
C. Lewis structure.
D. Mole ratio.
D. Mole ratio.
In the chemical equation wA + xB -> yC + zD, a comparison of the number of moles of A to the number of moles of C would be a(n)

A. Mass ratio.
B. Mole ratio.
C. Electron ratio.
D. Energy proportion.
B. Mole ratio.
In the chemical equation wA + xB -> yC + zD, if one knows the mass of A and the molar masses of A, B, C, and D, one can determine...

A. The mass of any of the reactants or products.
B. The mass of B Only.
C. The total mass of C and D only.
D. The total mass of A and B only.
A. The mass of any of the reactants or products.
10. in the reaction 2Al2O3 -> 4AL + 3O2, what is the mole ratio of aluminum to oxygen?

A. 10:6
B. 3:4
C. 2:3
D. 4:3
D. 4:3
In the reaction 2H2 + 02 -> 2H2O, what is the mole ratio of oxygen

A. 1:2
B. 2:1
C. 8:1
D. 1:4
A. 1:2
In the reaction Zn + H2SO4 -> ZnSO4 + H2, what is the mole ratio of zinc to sulfuric acid?

A. 1:6
B. 1:1
C. 1:2
D. 3:1
B. 1:1
In the Haber process for producing ammonia commercially is represented by the equation N2(g) + 3Hz(g) -> 2NH3(g). To completely convert 9.0 mol hydrogen gas to ammonia gas, how many mols of nitrogen gas are required?

A. 1.0 mol
B. 2.0 mol
C. 3.0 mol
D. 6.0 mol
C. 3.0 mol
For the reaction C + 2H2 -> CH4 how many moles of hydrogen are required to produce 10 mol of methane, CH4?

A. 2 mol
B. 4 mol
C. 10 mol
D. 20 mol
D. 20 mol
For the reaction 2H2 + 02 -> 2H2), how many grams of water are produced from 6.00 mol of hydrogen?
A. 2.00 g
B. 6.00 g
C. 54.0 g
D. 108 g
D. 108 g
For the reaction 2Na + Cl2 -> 2NaCl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium?

A. 35.5 g
B. 70.9 g
C. 141.8 g
D. 212.7 g
B. 70.9 g
For the reaction CH4 + 202 -> CO2 + 2H20, how many moles of carbon dioxide are produced from the combustion of 100 g of methane?

A. 6.23 mol
B. 10.8 mol
C. 12.5 mol
D. 25 mol
B. 10.8 mol
For the reaction HCl + NaOH -> NaCl + H2O, how many moles of hydrochloric acid are required to produce 150. g of water?

A. 1.50 mol
B. 4.16 mol
C. 8.32 mol
D. 12.2 mol
C. 8.32 mol