# How many grams are in 12 moles of helium?

How many grams are in 12 moles of helium?

ReportAnswer 1

Just under $50 \cdot g$.

#### Explanation:

$H e$ has a molar mass of $4.003 \cdot g \cdot m o {l}^{-} 1$.

$\text{Mass} = 4.003 \cdot g \cdot \cancel{m o {l}^{-} 1} \times 12 \cdot \cancel{m o l}$ $=$ ??*g

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