Multiple choice 20% ethanol by mass means 20 gm of ethanol is disolved in 80gm of solvent 20 gm of ethanol is disolved in 80gm of water 20 gm of ethanol is disolved 100gm of solvent 1000 ml of solution contains 20 gm of ethanol Reveal answer Fill a bubble to check yourself A Correct answer Explanation ANS. 1.