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

$\text{Approx. 7% (w/w)}$
$\text{Percentage by mass}$ $=$ "Mass of solute"/"Mass of solution"xx100% $=$ (22.8*g)/(325*g+22.8*g)xx100%=??%