Question

A solution is made containing 22.8g of magnesium nitrate per 325g of water. What is the percent by mass of the solute?

Answer 1

`"Approx. 7% (w/w)"`

Explanation:

`"Percentage by mass"` `=` `"Mass of solute"/"Mass of solution"xx100%` `=` `(22.8*g)/(325*g+22.8*g)xx100%=??%`

Why did I add the mass of the water and the magnesium nitrate?