What is the percent by mass of solute if 14.60g 74.95g of water?

16.30 %

In this case;

Mass of solute = 14.60 g

Mass of solvent = 74.95 g

But, Mass of solution = mass of solute + mass of solvent

Thus;

Mass of solution = 14.60 g + 74.95 g

                           = 89.55 g

Therefore;

% mass = (14.60 ÷ 89.55 g) × 100%

            = 16.30 %

Hence, the mass percent is 16.30%

can you attach a picture of the lettuce? : )