If 0.15 ml of Oxygen is obtained from analysis of a 1.0 ml sample of whole blood at STP, how many millimoles of Oxygen would be obtained from 100.0 ml of the same blood at STP?

If 0.15 ml of Oxygen is obtained from analysis of a 1.0 ml sample of whole blood at STP, how many millimoles of Oxygen would be obtained from 100.0 ml of the same blood at STP?
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If 0.15 ml of Oxygen is obtained from analysis of a 1.0 ml sample of whole blood at STP, how many millimoles of Oxygen would be obtained from 100.0 ml of the same blood at STP?

Answer

– Fraction of oxygen in blood = 0.15/1.0

– mL of Oxygen in 100 mL of blood = 100 *(0.15/1.0) = 15 mL

– At STP, one mole of gas occupies 22.4 L (= molar volume)

– 1 mmol of gas at STP, will therefore occupy 22.4 mL

– mmol of Oxygen in 100 mL of blood = 15/22.4 = 0.670 mmol