Unit 7 Review

The substances listed on the right side of a chemical equation are the

• Yields
• Reactants
• Products
• Precipitates

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

• 2
• 16
• 8
• 5

How many Hydrogen (H) atoms are in NH₃O5

• 3
• 4
• 5
• 1

How many molecules of Carbon are in the following formula? 3C₂H₆

• 3
• 6
• 12
• 18

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.
  

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Why must chemical equations be balanced?

• So that the equation doesn't explode

• The reaction won't happen until it is balanced

• Based on the Law of Conservation of Matter, matter cannot be created or destroyed.

• Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e