# What is the mass of three moles of ethane?

$\text{Ethane, } {H}_{3} C - C {H}_{3}$ has a molar mass of $30.07 \cdot g \cdot m o {l}^{-} 1$.
And thus the mass of $3$ $m o l$ $=$ $3 \cdot \cancel{m o l} \times 30.07 \cdot g \cdot \cancel{m o {l}^{-} 1}$ $=$ ??*g