In order to find the percent mass composition of a solute in a solution, we must use the following formula:
%mass = mass of solute/mass of solution
Now, we know that:
mass of solute = 270 grams
mass of solution = 460 grams
Adding these values into the formula will give us:
%mass = 270/460
%mass = 0.5869
Therefore the percent mass composition is 58.7 =%i