# How do you change 5.20 molecules of C_3H_6O_2 to grams?

Feb 17, 2016

$6.40 \times {10}^{-} 22 g$

#### Explanation:

The molecular mass of ${C}_{3} {H}_{6} {O}_{2}$ is

$3 \times 12.011 + 6 \times 1.008 + 2 \times 16.000 = 71.081 g m o {l}^{-} 1$

So 5.20 molecules will have the mass of

$5.20 \times 71.081 g m o {l}^{-} 1 \div 6.022 \times {10}^{23} m o {l}^{-} 1$

which gives $6.40 \times {10}^{-} 22 g$