Chem B Unit 6 Test Review

When studying Law of Conservation of Mass, what type of system is used?

• Open

• Closed

• Partially Open

• Partially Closed

Is this reaction following the Law of Conservation of Mass?

• Yes

• No

Explain why this question does NOT follow the Law of Conservation of Mass.

A log is weighed before it is burned. After the log is completely burned it is found the mass is much less. This matter was ____ _____. It was converted to a gas. (two words)

What unit is derived from 1/12th of a carbon atom?

• Atomic Number

• Isotope ratio

• Atomic Mass Unit

The atomic mass of barium is 137.33 amu and the atomic mass of flourine is 18.998 amu. What is the molar mass of BaF₂?

If you know the products of a chemical reaction, what can you deduce about the reactants?

• the mass of each reactant

• the state of matter each reactant is in

• the total number of reactants

• the number of atoms in the reactants

• HO

• H₂O

• 2H₂O

True or False: If you have 150 grams of reactants, you won't necessarily end up with 150 grams of products.

• True

• False