Question

What mass of a .413% KCN solution contains 545 mg of KCN?

Answer 1

328 % means 0.328 g of KCN in 100 g of solution

0.328 g of KCN ---------> 100 g of solution

1120 * 10^-3 g of KCN ------> (100 / 0.328) * 1120 * 10^-3

= 341 g of solution