Question

At $273K$ temperature and $76cmHg$ pressure, the density of a gas is $1.964g{L}^{-1}$. The gas is

• A. $C{H}_4$
• B. $CO$
• C. $He$
• D. $C{O}_2$

Answer 1

Answer: (D)

Molar mass of gas $(M)=\frac{dRT}{P}$
$=\frac{1.964\times 0.0821\times 273}{1}=44g$
Hence, the gas is $C{O}_2$