What is the mole fraction of oxygen gas in air (see Table

Problem 66EWhat is the mole fraction of oxygen gas in air (see Table 5.3 ) What volume of aircontains 10.0 g of oxygen gas at 273 K and 1.00 atm Step by step solutionStep 1 of 3From the given,The volume percent of oxygen in air is 21%. That is 100 L of air contains 21 L of oxygen gas.But we need oxygen's mole fraction, so apply Avogadro's law which states that volume of a gasis directly proportional to the amount of gas at constant temperature, pressure conditions ( constant T, P).Let’s calculate mole fraction of oxygen in air as follows\nHence, the mole fraction of oxygen in air is 0.21.