# How many moles does 22.0 grams of CO_2 represent?

Approx. $\frac{1}{2}$ a $\text{mole}$.
Carbon dioxide has a molar mass of $44.01 \cdot g \cdot m o {l}^{-} 1$. So the given quantity represents, $\frac{22.0 \cdot g}{44.01 \cdot g \cdot m o {l}^{-} 1}$ $=$ ?? $\text{moles}$ of carbon dioxide?