" The total volume of mixture of "2" gms of helium and "7" gms of nitrogen under S.TP conditions is "

The total volume of mixture of 2 gms of helium and 7 gms of nitrogen under S.T.P comditions is

Number of molecules in 7.0 gm of nitrogen gas is

The total pressure exerted by a mixture of 8 gm of dioxygen and 4 gm of dihydrogen confined in a closed vessel of 1 L at 27^(@)C is :

What is the volume of 1 gm of hydrogen at STP?

A mixture of 7g of nitrogen and 8g of oxygen at STP occupies a volume of

The volume occupied by 8gm of oxygen at S.T.P is

A mixture of Na_(2)CO_(3) and NaHCO_(3) having a total weight of 100 gm on heating produced 11.2L of CO_(2) under STP conditions. The percentage of Na_(2)CO_(3) in the mixture is