Which of following flasks has higher pressure ,
5.00 L containing `4.15 g` of Helium at 298 K

Explanation

Valume of the flask `V=5.00 L`
Temperature `T=-298K`
Gas constnat `R=0.0821 L"atm K mol"^(-1)`
Mass of He `=4.15 g`
No. of moles He `=("Mass")/("Molarmass")=(4.15)/(4)`
`=1.0375` mols
According to Ideal gas equation
`PV=nRT`
`P=(n)/(V)RT=(1.0375xx0.0821xx298)/(5)`
Pressure of helium `=5.076` atm