Question

Density of gas found be 5.5g/l at 2bar pressure and at 25 calculate it's molar mass

Answer 1

PV=nRT
PV=wRT/M
on rearranging
PM=wRT/V
M=dRT/P............1
here P is pressure V is volume R is gas constant
w is given mass of gas M is molar mas
d is density and T is temp.
now using equation 1.
M=dRT/P
M=5.5x298x0.083/2
. =136/2
. =68g

Answer 2

Explanation:

Dear Student,

pV=nRTor,

pV=mMRTor,

p=mMVRTor,

p=ρMRTand,

ρ=mV

Therefore,

M=ρpRTp= 2 bar T=25°C= 25+273=298 KSo, M=5.52×0.083×298=67.33 g

Hope it is clear

thankyou