Question

plzz tell me the answer of this questions fast in short.

Answer 1

Mass percent = (Mass of solute / Mass of solution ) × 100 
Where, Mass of solution = Mass of solute + Mass of solvent.
Here, 
Mass of solution = 120 g 
Mass of solute = 16 g 
Mass percent = 16/120 × 100 
= 13.33