# What is the mass of 0.50 mole of baking soda, NaHCO_3?

Approx. $42 \cdot g$; that's a lot of scones..........
The molar mass of sodium bicarbonate is $84.01 \cdot g \cdot m o {l}^{-} 1$. To find the mass of a half mole quantity, we calculate the product..........
$0.50 \cdot \cancel{m o l} \times 84.01 \cdot g \cdot \cancel{m o {l}^{-} 1} \equiv 42 \cdot g$