Chemical Reactions Review

The products of a chemical reaction are on the

• Left side (Products → Reactants)

• Right side (Reactants → Products)

The reactants of a reaction are on the

• Left side (Reactants → Products)

• Right side (Products → Reactants)

The law of conservation of mass states that

• The mass of a system (reaction) increases from beginning to end

• The mass of a system (reaction) stays the same from beginning to end

• The mass of a system (reaction) decreases from beginning to end

Is this equation balanced? 
(Are there the same amount of H and O atoms on both sides of the equation?)

   $H_2O_2\rightarrow\ H_2O\ +\ O_2$  

• Yes

• No

In the diagram, letter D represents a

• subscript

• coefficient

• product

• equation

In the diagram, letter E represents a

• subscript

• coefficient

• product

• equation

Which are the reactants in the equation shown?

• H₂O and CO₂
• O₂ and CH₄

Which is the product in the reaction shown?

• Al₂O₃

• Al

• O₂

In the reaction shown below, 12 grams of AB break down into 8 grams of product A and an unknown amount of product B.

Using the law of conservation of mass, what will the mass of product B be?

• 4 grams

• 8 grams

• 12 grams

• 20 grams

___C₃H₈ +___O₂ --> ___CO₂ + ___H₂O

• 1,5,3,4
• 2,10,6,8
• already balanced
• 1,5,5,4