Question

One litre of a gas at STP weigh $1.16g$ it can possibly be:

Answer 1

At STP, $1L$ of the gas possesses ]$1.16g\left(given\right)$

The volume of $1mole$ of any gas is called its molar volume and is equal to $22.4L$ at $STP$

So, $22.4L$ of the gas should have mass
$=22.4\times 1.16g=25.984g\approx 26g$

And also, molar mass of $C_2{H}_2$ is $26gmo{l}^{-1}.$

So, the molar mass of the gas and molar mass of $C_2{H}_2$ is $26gmo{l}^{-1}.$

Thus, the gas is $C_2{H}_2.$

So option (c) is the correct answer.