Answer
$10.67$ ounces
Work Step by Step
Let $y$ be the amount of water that is evaporated. There is $0.04\cdot32=1.28$ ounces of salt. Then our equation is: $\frac{1.28}{32-y}=0.06\\1.28=0.06(32-y)\\1.28=1.92-0.06y\\0.06y=0.64\\y=10.67$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.