1 litre of oxygen effuses through a small hole in 60 min. and a litre of helium at the same temperature and pressure effuses through the same hole in 21.2 min. What is the atomic weight of Helium -

At 27^(@)C , hydrogen is leaked through a tiny hole into a vessel for 20 min . Another unknown gas at the same temperature and pressure as that of hydrogen is leaked through the same hole for 20 min . After the effusion of the gases, the mixture exerts a pressure of 6 atm . The hydrogen content of the mixture is 0.7 mol . If the volume of the container is 3 L , what is the molecular weight of the unknown gas?

At 27^(@)C , hydrogen is leaked through a tiny hole into a vessel for 20 min . Another unknown gas at the same temperature and pressure as that of hydrogen is leaked through the same hole for 20 min . After the effusion of the gases, the mixture exerts a pressure of 6 atm . The hydrogen content of the mixture is 0.7 mol . If the volume of the container is 3 L , what is the molecular weight of the unknown gas?

At 27^(@)C , hydrogen is leaked through a tiny hole into a vessel for 20 min . Another unknown gas at the same temperature and pressure as that of hydrogen is leaked through the same hole for 20 min . After the effusion of the gases, the mixture exerts a pressure of 6 atm . The hydrogen content of the mixture is 0.7 mol . If the volume of the container is 3 L , what is the molecular weight of the unknown gas?

The pressure in vessel that contained pure oxygen dropped from 2000 torr to 1500 torr in 40 min as the oxygen leaked through a small hole into a vacuum. When the same vessel was filled with another gas, the pressure dropped from 2000 torr to 1500 torr in 80 min. What is the molecular weight of the second gas ?

'The number of atoms in 1 mole of hydrogen is twice the number of atoms in 1 mole of helium, at the same temperature and pressure." Why ?

432 mL of gas A effuses out through a fine orifice in 36 min. 288 mL of another gas B effuses out through the same orifice in 48 mon. if the molecular weight of B is 64, what is the molecular weight of A?