Stoichiometry Quiz

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

• qualitative analysis

• entropy

• chemical kinetics

• stoichiometry

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

• reaction stoichiometry

• composition stoichiometry

• percentage yield

• Avogadro's principle

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

• reaction stoichiometry

• composition stoichiometry

• electron configuration

• periodic law

Which of the following would be investigated in reaction stoichiometry?

• the masses of hydrogen and oxygen in water

• the amount of energy released in chemical reactions

• the mass of potassium required to produce a known mass of potassium chloride

• the types of bonds that break and form when acids react with metals

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

• reaction stoichiometry.

• chemical equilibrium.

• chemical kinetics.

• 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 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.

A balanced chemical equation allows one to determine the

• mole ratio of any two substances in the reaction.

• energy released in the reaction.

• electron configuration of all elements in the reaction.

• mechanism 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.

To balance a chemical equation, it may be necessary to adjust the

• coefficients.

• subscripts.

• formulas of the products.

• number of products.