Answer :
answer and explanation
the percent mass %m/m of a solution is the mass of the solute divided by the mass of the solution x 100
therefore
%m/m = 3 g/ 78g x 100
= 3.85%
answer and explanation
the percent mass %m/m of a solution is the mass of the solute divided by the mass of the solution x 100
therefore
%m/m = 3 g/ 78g x 100
= 3.85%