Chapter 9 Test Honors Chemistry

What branch in chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?

• Qualitative relationships
• Chemical kinetics
• Entropy
• Stoichiometry

What is the study of mass relationships of elements in compounds?

• Reaction stoichiometry
• Composition stoichiometry
• Percentage yield
• Avogadro’s Number

What is the study of the mass relationships among reactants and products in a chemical reaction?

• Reaction stoichiometry
• Composition stoichiometry
• Electron configuration
• Periodic law

A determination of the masses and number of moles of nitrogen and oxygen in the compound nitrogen dioxide would be studied in

• Reaction stoichiometry
• Chemical kinetics
• Chemical equilibrium
• Composition stoichiometry

Which of the following would not be studied in the branch of chemistry called stoichiometry?

• The mole ratio of aluminum and chlorine in aluminum chloride
• The amount of energy required to break the ionic bonds in calcium fluoride
• The mass of carbon produced when a known mass of sucrose decomposes
• The number of moles of hydrogen that reacts completely with a known quantity of oxygen

The chemical coefficients in a chemical equation represent the

• Masses, in grams, of all reactants and products.
• Relative numbers of moles of reactants and products.
• Number of atoms in each compound in a reaction.
• Number of valence electrons involved in the reaction.

Each of the four types of reaction stoichiometry problems requires using a

• Table of bond energies.
• Chart of electron configurations
• Lewis structure.
• Mole ratio.

Theoretical yield must be determined by

• experiments.
• calculations.
• theoretical yield.
• estimation.

A chemical reaction involving substances A and B stops when B is completely used. B is the

• Excess reactant
• Limiting reactant
• Primary reactant
• Primary product

In the chemical reaction wA + xB→yC +zD, a comparison of the number of moles of A to the number of moles to C would be a(n)

• mass ratio
• mole ratio
• electron ratio
• energy proportion