The density (in g/L) of helium (He) gas at 723 torr and 225 K is?

How many g/L ?

1 Answer
Oct 23, 2017

ρ=0.2gL1

Explanation:

Now PV=nRT.....and thus PRT=nV=massmolar massV

And so PRT×molar mass=massV=ρhelium as required...

ANd we assume of molar quantity of 1mol under the given conditions....

ρhelium=723Torr760Torratm1×4.003gmol10.0821LatmKmol×225K

=0.206gL1