# How many moles of water are in a 710 gram bottle of water?

Dec 25, 2015

There are approx. 39.4 moles of water in a 710 g mass.

#### Explanation:

No. of moles, $n$, is simply mass divided by molar mass, which will give a quantity in moles:

i.e. $\frac{710 \cdot \cancel{g}}{18 \cdot \cancel{g} \cdot m o {l}^{-} 1}$ $=$ ?? mol

Dimensionally this operation has given an answer in moles (as required), because $\frac{1}{{x}^{-} 1}$ $=$ $\frac{1}{\frac{1}{x}}$ $=$ $x$. Capisce?

What is the volume of this mass of water? Why?