# How many oxygen molecules are in 3.36 g of oxygen?

Oct 25, 2017

$6.321$ x ${10}^{22}$

#### Explanation:

Solution:

Mass of Oxygen = $3.36 g$
Molar mass of oxygen (${O}_{2}$) = 16 x 2 = $32 g m o {l}^{-}$
Total molecules in oxygen = Mass in grams/Molar mass x ${N}_{A}$
= $\frac{3.36}{32}$ x$6.02$ x ${10}^{23}$
= $6.321$ x${10}^{22}$

Note:
${N}_{A}$(Avagadro's number) = $6.02$ x ${10}^{23}$

Hope it helps...