Question

A solution contains 40 g of nacl in 320 g of water. calculate the concentration in terms of mass by mass percentage of the solution

Answer 1

for this question you have to do like weight of solute upon weight of solution so your answer would be 40 upon 360 into 100 so you are required sir would become hundred up on 9 %

Answer 2

here formula is used
concentration=solutions/solvent ×100.
if you will do like that your answers is come