Answer quick
what is the percentage by mass of solution formed by dissolving 27.0 grams of hcl in 102.0 grams of water?

26.5%
20.9%
18.2%
16.7%

20.9%

Explanation:

% Mass of solution = mass of solute/mass of solution × 100%

                               = (27.0 g/ 129.0 g) × 100%

                               = 20.93%

                               = 20.9%

The answer is 20.9%

Explanation:

This is because you divide the mass of the solute.

I also took the test and that was the correct answer.

there is none because earth is stationary and flat.