Explanation

A 10% (w/w) sugar solution means that 10 grams of sugar (the solute) is dissolved in 90 grams of water (the solvent), making a total of 100 grams of solution.

The percentage is calculated as:

(10 g sugar / 100 g total) × 100% = 10% (w/w)

So, 10 grams of sugar is dissolved in 90 grams of water.