Percent Mass = (Mass of Solute / Mass of Solution) x 100%

Here's what each part means:

* Solute: The substance that is being dissolved.

* Solution: The mixture of the solute and solvent.

* Solvent: The substance that dissolves the solute.

Example:

Imagine you dissolve 10 grams of sugar (solute) in 100 grams of water (solvent). The total mass of the solution would be 110 grams.

To find the percent mass of sugar in the solution:

1. Mass of Solute: 10 grams

2. Mass of Solution: 110 grams

3. Percent Mass = (10 grams / 110 grams) x 100% = 9.09%

Therefore, the sugar solution has a 9.09% mass concentration.