Question

Calculate the mass of each compound containd in 60g of a 4.5%m/m CaCl2(aq)solution

Answer 1

4.5% CaCl2 m/m means 4.5 g CaCl2/100 g soln. That is 4.5 g CaCl2 in a soln of (4.5 g CaCl2 + 95.5 g H2O).

You have 60 g of this soln; therefore, you have g H2O = 60 x (95.5/100) = ? g H2O.
60 x (4.5/100) = ? g CaCl2.