2. The mass of solid precipitates after performing a chemical reaction in Experiment 1 is 38.3 grams. The
mass of the solids in Experiment 2 is 35.9 grams. What is the percent change of the mass from
Experiment 1 to Experiment 2?
a. 6.3% increase
b. 6.3% decrease
c. 6.7% increase
d. 6.7% decrease