the volume of alcohol present in 620 mL of a 40% (v/v) solution of alcohol is ______?

A. 372 mL
B. 40 mL
C. 248 mL
D. 580 mL

2 answers

What's the definition?
(volume alcohol/volume solvent)x 100 = 40
Substitute and solve for volume alcohol.
Think about what 40% of 620 is, and the URGENCY should go away.