Question

Find the moles of ${\text{O}}_{\text{2}}$ gas having pressure $250$ bar in $500$ mL vessel at $350$ K temperature.

• A. $4.296$
• B. $4.859$
• C. $5.123$
• D. $6.347$

Answer 1

The correct option is A $4.296$

Ideal gas equation $PV=nRT$

$n=\frac{PV}{RT}$

Given, $P=250bar$

$V=500mL$

$T=350K$

$n=\frac{250bar\times 500\times {10}^{-3}L}{\left(0.0831\right)\left(\frac{L-atm}{mol-k}\right)\left(350K\right)}=4.293$

No. of moles of $O_2=4.293$ moles.

Hence, the correct option is $\text{A}$