To calculate mole fraction of a component in a reaction mixture , we need to first calculate the number of moles of each component in the mixture by using the formula :
Number of moles = Mass / Molar mass ........1
This is because the mole fraction of a species in a reaction mixture is defined as the ratio of number of moles of that species to the total number of moles of all the species present in the reaction mixture. Thus if a mixture contains 3 species or components A, B and C then the mole fraction of A would be :
Mole fraction of A = (Number of moles of A / Total number of moles of A, B and C ) ............2
1. The given data is :
Mass of N2 = 14.0 g
Mass of H2 = 2.40 g
Mass of CH4 = 19.4 g
Also , we know
Molar mass of N2 = 28 g/mol
Molar mass of H2 = 2 g/mol
Molar mass of CH4 = 16 g/mol
Thus using formula 1 we can calculate number of moles of each as:
2. In second question the data given is :
Mass of N2 = 9.60 g
Mass of H2 = 2.80 g
Mass of CH4 = 13.8 g
The number of moles of each component in this mixture are calculated as :
1st attempt A gas mixture contains 14.0 g of N2, 2.40 g of H2, and 19.4...
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