What is the mole percentage of O₂ in a mixture of 7g of N₂ and 8g

1.	What is the mole percentage of O₂ in a mixture of 7g of N₂ and 8g of O₂
Answer» MOLAR MASS of O₂ = 32g 8g of O₂ = 8/32 MOLES = 0.25 MOLE molar mass of N₂ = 28g 7g of O₂ = 7/28 moles = 0.25 mole $mole\ percentage\ of\ O_2 = \frac{moles\ of\ O_2}{moles\ of\ O_2+moles\ of\ N_2}100 \\ \\mole\ percentage\ of\ O_2 = \frac{0.25}{0.25+0.25} 100=\boxed{50}$

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