# The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?

Dec 23, 2015

$111$ $g$/$\text{mol}$

#### Explanation:

Weight of $C a$ = $40$
Weight of $C l$ = $35.5$

Molecular formula is $C a C {l}_{2}$ i.e. $1$ atom of $C a$ and $2$ atoms of $C l$.

Hence, molecular weight = $\text{1 x 40 + 2 x 35.5}$ = 40 + 71 = $111$ $g$/$\text{mol}$. But if you look at the weight online, it says $110.98$ $g$/$\text{mol}$, which is close to $111$.

Hope this helps!