Question

A solution contains 39% phosphoric acid by mass. This means that ________. 100 g of this solution contains 39 g of phosphoric acid 1 mL of this solution contains 39 g of phosphoric acid 1 L of this solution has a mass of 39 g 1 L of this solution contains 39 mL of phosphoric acid the density of this solution is 3.9 g/mL

Answer 1

A. 100 g of this solution contains 39 g of phosphoric acid

Step-by-step explanation:

The formular for percentage by a mass id usually given as;

( Mass of element / Mass of compound ) * 100%

So when a solution contains 39% by mass of phosphoric acid, it means that in 100 units of the solution, there are 39 units of phosphoric acid.

The only option that satisfies this is option A. 100 g of this solution contains 39 g of phosphoric acid