Q. A gaseous mixture enclosed in a vessel consists of one gm mole of a gas with and another with at a temperature . The gases and do not react with each other and assumed to be ideal. Find the number of gram moles of the gas if of the gaseous mixture is .

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Answer: 2

Solution:

For two gases, we can write

Here,

Substituting these values in above equation, we get

or
or

gram mole.