4th Period: 8.5E Chemical Reactions

RAP stands for?

• Reactant and Product

• Reactant Arrow Product

• Reactant Assigns Product

• Reactant Assumes Producgt

In a chemical reaction, these substances that take part in the reaction and undergo change?

• Products

• Elements

• Reactants

• Compounds

According to the Law of the Conservation of Mass, matter can be created or destroyed?

• True

• False

In a balanced equation, the number of atoms in the reactants equals the number of atoms in the products.

• True

• False

Which of the following are signs that a chemical reaction takes place? Check all that apply.

• Odor

• Unexpected temperature change

• Gas production

• None of the above

In a chemical formula, the coefficient tells us the number of atoms in a molecule.

• True

• False

How many atoms of hydrogen are in this molecule: 3(NH₃)₂Cr₂O₇?

• 3

• 6

• 12

• 18

What part of a chemical formula represents the elements present?

• Chemical symbol

• Coefficient

• Subscript

• None of the above

Is this equation balanced:

FE₂O₃ + C --> Fe + CO₂

• Yes

• No

A chemical equation is a representation of a physical change.

• True

• False