One mole mixture of `CH_4` and air (containing 80% `N_2` 20 % `O_2` by volume ) of a composition such that when underwent combustion gave maximum heat (assume combustion of only `CH_4`).Then which of the statements are correct , regarding composition of initial mixture ? (X presents mole fraction )

Statement-1 : Average molar mass of a gaseous mixture of O_2 and CH_4 gas will be 24 g/mole. Statement-2 : Average molar mass depends upon composition of the mixture.

A mixture of FeO and Fe_3O_4 when heated in air to a constant weight gains 5% in its weigh. Find the composition of the initial mixture.

A mixture of FeO and Fe_(3)O_(4) when heated in air to a constant weight, gains 5% of its weight. Find the composition of the intial mixutre.

A mixture of FeO and Fe_(3)O_(4) when heated in air to a constant weight, gains 5% of its weight. Find the composition of the intial mixutre.

A mixture of FeO and Fe_(3)O_(4) when heated in air to a constant weight, gains 5% of its weight. Find the composition of the intial mixutre.

The vapour density of a mixture containing NO_2 and N_2O_4 is 27.6. The mole fraction of NO_2 in the mixture is

One litre sample of a mixture of CH_(4) and O_(2) measured at 32^(@)C and 760 torr, was allowed to react at constant pressure in a calorimeter. The complete combustion of CH_(4) to CO_(2) and water caused a temperature rise in calorimeter of 1K . calculate mole % of CH_(4) in original mixture. [Given: Heat of combustion of CH_(4) is -210.8 Kcal//mol . Total heat capacity of the calorimeter = 2108 cal K ]

A 4: 1 molar mixture of He and CH4 is contained in a vessel at 20 bar pressure. Due to a hole in the vessel, the gas mixture leaks out. What is the composition of the mixture effusing out initially?