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

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Answer 1 · 2016-02-17T16:58:20

$6.40xx10^-22 g$

The molecular mass of $C_3H_6O_2$ is

$3xx12.011+6xx1.008+2xx16.000=71.081 g mol^-1$

So 5.20 molecules will have the mass of

$5.20xx71.081 g mol^-1 div 6.022xx10^23 mol^-1$

which gives $6.40xx10^-22 g$

How do you change 5.20 molecules of C_3H_6O_2C_3H_6O_2 to grams?