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A balloon contains 0.76 mol N2, 0.18 mol O2, 0.031 mol He and 0.026 mol H2...

A balloon contains 0.76 mol N2, 0.18 mol O2, 0.031 mol He and 0.026 mol H2 at 749 mm Hg. What is the partial pressure of O2?

Solutions

Expert Solution

mole fraction of O2 = moles of O2 / total moles

                                = 0.18 / (0.76 + 0.18 + 0.031 + 0.026)

                                = 0.18 / 0.997

                               = 0.1805

partial pressure of O2 = mole fraction x total pressure

                                    = 0.1805 x 749

partial pressure of O2 = 135 mm Hg

queen_honey_blossom answered 1 year ago
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