Question

two vessels A and B are filled with the same gas where volume temperature and pressure in a is twice the volume temperature and pressure in b calculate the ratio of the number of molecules of a and b​

Answer 1

Let us consider that there are 100 g of each Hydrogen and Helium in two separate containers. Then the no.of moles of Hydrogen and Helium in each vessel would be,

No.of moles of H2= Wt./ Mol.Wt.=100/2 =50 No.of moles of He=Wt/Mol.Wt=100/4=25.

The Press of the gas in vessels of equal volume will be proportional to the no.of moles of the gas.

The Pressure of Hydrogen gas with 50 moles is 2 atm, then the Pressure of Helium gas with 25 moles will be = 2 x 25/50= 1 atm.

So the Pressure of Helium gas will be 1 atm.