Equal weights of methane and hydrogen are mixed in an empty container at 25ºC. The fraction of the t — States of Matter and Gaseous State Chemistry Question
Question
Equal weights of methane and hydrogen are mixed in an empty container at 25ºC. The fraction of the total pressure exerted by hydrogen is
Answer: B
💡 Solution & Explanation
Let x gram of both gases are added. Number of moles for hydrogen = given mass/ molecular mass = x/2 Number of moles for methane = given mass/ molecular mass = x/16 Mole fraction for hydrogen = ( / 2) / ( / 2 /16) x x x =8/9. Partial pressure of hydrogen/ Total pressure = mole fraction of hydrogen = 8/9.
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