What is the mole fraction of NO2 in a mixture of gases made up of 5.0 g of NO2, 10.0 g of SO2, and 1.5 g of H2?
moles of gas=molar mass of the gas/mass
mole fraction of NO2=moles of NO2/total moles
(5 g NO2) / (46.0055 g NO2/mol) = 0.109 mol NO2 (10 g SO2) / (64.0638 g SO2/mol) = 0.156 mol SO2 (1.5 g H2) / (2.015894 g H2/mol) = 0.744 mol H2 (0.109 mol NO2) / (0.109 mol + 0.156 mol + 0.744 mol) = 0.11 NO2
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