An 800 g solution of kool-aid contains 780 g of water. what is the mass percent of solute in this solution?

Mass % = (mass of solute / Mass solution) * 100

= (20 / 800) * 100

=2.5 %

Hence, mass % is 2.5

The answer is: the mass percent of solute is 2.5 %

Explanation:

A solution has two components, the solvent and the solute. The solvent is present in greater quantity usually. If 780 g of 800 g are of eater, that means water is the solvent, therefore 20 g are solute. To find the percentage, use the next equation:

% of solute = (g of solute/g of total solution) * 100

% of solute = (20/800) * 100 = 2.5