Question

What is the density of $C{O}_2$ at ${27}^{\circ }C$ and $2.5atm$ pressure?

• A. $5.2g{L}^{-1}$
• B. $6.2g{L}^{-1}$
• C. $7.3g{L}^{-1}$
• D. $4.46g{L}^{-1}$

Answer 1

The correct option is D $4.46g{L}^{-1}$

Here, $T={27}^{\circ }C=27+273=300K$

$P=2.5atm$

The molar mass of($M$) $C{O}_2=44g/mol$

From ideal gas equation,
$d=\frac{PM}{RT}=\frac{2.5\times 44}{0.0821\times 300}=4.46g{L}^{-1}$.