Equal weights of ethane and hydrogen are mixed in an empty vessel at 25 degree celsius. Calculate the fraction of the total pressure exerted by hydrogen.

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Let x g of each gas is mixed.
 
Molar mass of ethane = 30 g/mol
 
Molar mass of hydrogen = 2 g/mol
 
Mole = Given mass/Molar mass
 
Moles of ethane = (x/30) mol
 
Moles of hydrogen = (x/2) mol

Equal weights of ethane and hydrogen are mixed in an empty vessel at 25 degree celsius. Calculate the fraction of the total pressure exerted by hydrogen.
 

Equal weights of ethane and hydrogen are mixed in an empty vessel at 25 degree celsius. Calculate the fraction of the total pressure exerted by hydrogen.
 
So, the fraction of total pressure exerted by hydrogen is 15:16.

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