What is the mass percent of a solution if 42.9 grams of aspirin is dissolved into 175 mL of ethanol? (Density of ethanol is 0.789 g/mL)

Question

1. 31.1 %

2. 24.5 %

3. 23.7 %

4. 19.7 %

Answer 1

Use the density to calculate the mas of the 175 mL ethanol.
Add mass ethanol to mass aspirin.
mass % = (mass aspirin/total mass)*100 = ?