Question

A balloon is filled with 4 gram of He gas at 22°C and 720 mm of Hg.
The volume of the gas is
(A) 20.5 L
(B) 25.6 L
(C) 34.8 L
(D) 38.6 L​

Answer 1

Answer:

The volume of the gas is (B) 25.6L. Thank you.

Answer 2

Answer:

Pressure =  $\frac{720}{760} atm$

Temperature = 295 K  

Weight of the gas = 4g

PV = nRT

V =   $\frac{nRT}{P}$

   = $\frac{1}{720}$ × $0.0821$ × $295$ × $760$

   = $25.565 L$

   ≈ 25.6 L