please answer all questions

1. What is the mole fraction of N2 if a flask contains a mixture of 2.22 g H2 gas (H=1.01 g/mol) and 28.74 g N2 gas (N=14.00 g/mol). Give yiur answer to 2 decimal places.

2.A flask contains a mixture of 2.66 mol He and 0.78 mol Ne gases. Determine the partial pressure od Ne( in mm) if the total pressure is 443 mm.

3. What is the root-mean square(Urms) of a nitrogen molecule that has a average KE of 6.24 x 10^-21 j/ molecule ?

4. What is the root mean square speed of SO2 gas at 838 C ? ( O= 16.00 g/mol, S = 32.07 g/mol )

5. Calculate molar mass (g/mol) of a gas if its root mean square speed is 1.82 x 10^2 m/s at 23 C.

6. the ratio of effusion of an unknown diatomic gas to argo is 0.28:1. What is the molar mass of the unknown gas ?