Quiz: Chemical Reactions

1. During chemical reactions, atoms are
a. broken down into smaller particles
b. never broken down into smaller particles
c. unchanged
2. A chemical equation is used to describe how two or more substances
a. look in a jar
b. vaporize
c. interact during a chemical reaction
3. In a chemical reaction
a. products are on the left and reactants on the right of the reaction arrow
b. products and reactants are on both the left and the right of the reaction arrow
c. reactants are on the left and products on the right of the reaction arrow
4. According to the Law of Conservation of Mass
a. the mass of the reactants is greater than the mass of the products
b. the mass of the reactants is equal to the mass of the products
c. the mass of the products is greater than the mass of the reactants

Questions 5–7 are based on the following equation at STP:

equation

5. How many liters of O2 can be produced from 18.02 g of H2O?
a. 22.4 L O2
b. 44.8 L O2
c. 11.2 L O2
6. How many grams of H2 can be produced from 18.02 g of H2O?
a. 2.02 g H2
b. 18.02 g H2
c. 9.01 g H2
7. How many liters of O2 can be produced from 36.04 of H2O?
a. 44.8 L O2
b. 10.2 L O2
c. 22.4 L O2
8. The compound carbon monoxide has a chemical formula represented by CO. For every 24.02 g of carbon you will have
a. 32.00 g O
b. 16.00 g O
c. 24.02 g O

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