First slide

Gaseous state

Question

The partial pressure of oxygen in air is 22 kPa. What is the oxygen content in Per cent volume?

Moderate

A

42%
B

21.7%
C

11%
D

5.5%

Solution

$p_{atm} = 1 atm = \frac{10^{5}}{0 .987} pascal = 101 .317 kPa p_{O_{2}} = 22 kPa per cent volume = \frac{22}{101 .317} \times 100 = 21 .7 %$

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