The molar mass of the element is approximately 100 g/mol.
We can use the Ideal Gas Law to solve this problem:.
#color(blue)(bar(ul(|color(white)(a/a)pV = nRTcolor(white)(a/a)|)))" "#
#pV = (m/M)RT#
And we can solve this equation to get
#M = (mRT)/(pV)#
In your problem,
However, the gas is diatomic, with molecular formula
∴ The molar mass of