# What is the density of carbon dioxide at STP? (C=12.01g/mol; O=16.00g/mol)

Mar 4, 2018

${\text{0.00195 g/cm}}^{3}$

#### Explanation:

The molar mass of $C {O}_{2}$ is $\text{12.01 g/mol" + 2*"16 g/mol" = "44.01 g/mol}$

At S.T.P, the molar mass of $C {O}_{2}$ occupies ${\text{22.4 L" = "22400 cm}}^{3}$, i.e. $\text{1 mol}$ occupies ${\text{22400 cm}}^{3}$

So, the density of $C {O}_{2}$ at S.T.P is

$= {\text{44.01 g"/("22400 cm"^3) = "0.00195 g/cm}}^{3}$