Question

Question #0dcf7

Answer 1

`8` grams.

Explanation:

A `2.0% "m/v"` (mass/volume) solution is `2` grams of solute in `"100 mL"` of final solution.

So for `"400 mL"` of solution, you require

`400 cancel("mL") * "2 g"/(100cancel("mL")) = "8 g"`