A chemist mixes 65.6 g of ethanol with 15.1 g of acetone and 99.6 g of 4-methyl-2-pentanone. Calculate the percent by mass of each component of this solution. Round each of your answers to 3 significant digits

Ethanol = 36.4%

Acetone = 8.37%

4-methyl-2-pentanone = 55.2%

Explanation:

Mass of ethanol = 65.6g

Mass of acetone = 15.1g

Mass of 4-methyl-2-pentanone = 99.6g

Total Mass = 65.6 + 15.1 + 99.6 = 180.3g

% Mass of ethanol = (65.6/180.3) x 100 = 36.4%

% Mass of acetone = (15.1/180.3) x 100 = 8.37%

% Mass of 4-methyl-2-pentanone = (99.6/180.3) x 100 = 55.2%