# What is the mass of 1.5 moles of CO_2?

Mar 28, 2017

The mass of 1.5 moles of $C {O}_{2}$ is 66 grams

#### Explanation:

Let:
$n$ be the number of moles
$m$ be the mass
$M$ be the molecular weight

$n = 1.5 m o l$

By definition:

$n = \frac{m}{M}$

$m = n \cdot M$

$M \left(C\right) = 12 g / m o l$
$M \left({O}_{2}\right) = 2 \cdot 16 g / m o l = 32 g / m o l$
$M = 12 g / m o l + 32 g / m o l$
$M = 44 g / m o l$

$m = 1.5 m o l \cdot 44 g / m o l$
$m = 66 g$