Vinegar is 5.0% acetic acid, C2H40, by mass?

Question

(a) How many grams of acetic acid are, contained in 24.0
g of vinegar? .
(b) How many pounds of acetic acid are c.ontained in
24.0 pounds .of vinegar?
(c) How many grams of sodium chloride, NaCI, are
contained in 24.0 g .of saline solution that is 5.0%
NaCI by mass?

Answer 1

If the vinegar is 5% acetic acid by mass, all you need to do is to take the total mass (in the first example, 24.0 g) and multiply by 5% = 0.05.

The other problems all work in the same way.