15g mixture of He and Ar occupied "30L" at "1" atm pressure and "300K" .The amount of He in the mixture "

18 g mixture of hellium and argon occupied 30 L at 1 atm pressure and 27^(@)C . Calculate the percentage of these gases in the mixture.

A mixture of ethane and ethene occupies 41 L at atm and 500 K. The mixture reacts compeletly with 10/3 mole of oxygen to produce CO_(2) and water. The mole fraction of ethane and ethene in the mixture are (R=0.0821L atm K^(-1)mol^(-1) respectively

32 g of oxygen and 3.0 g of hydrogen are mixed and kept in a vessel at 760 mm pressure and 0^(@)C . The total volume occupied by the mixture will be nearly

60 g of gaseous C_(2)H_(6) are mixed with 28 g of carbon monoxide. The pressure of the resulting gaseous mixture is 3 atm. The partial pressure in atm. Of C_(2)H_(6) in the mixture is

If a mixture of CO and N_(2) in equal amount have total 1 atm pressure, then partial pressure of N_(2) in the mixture is

A cylinder contains He at 2 atmosphere pressure and hydrogen at 1.5 atmosphere pressure. What is the pressure of the mixture of gases in the cylinder ?

What mass of an oxygen gas will occupy 8.21 L of volume at 1 atm pressure and 200 K temperature ?