If water contains $16\mathrm{.}7m\frac{g}{L}Mg$ and $53\mathrm{.}8m\frac{g}{L}$ of $Ca$

What is the contribution of $Mg$ to the water hardness expressed as a concentration of $CaC{O}_3?$

$m\frac{g}{L}$

What is the contribution of $Ca$ to the water hardness expressed as a concentration of $CaC{O}_3?$

$m\frac{g}{L}$

What is the hardness of the water?

$$

$m\frac{g}{L}$