Question

Our atmosphere has 21% of the oxygen gas, what will be the partial pressure exerted by this gas?

• A. 158 mmHg
• B. 159 mmHg
• C. 160 mmHg
• D. 173 mmHg

Answer 1

The correct option is B 159 mmHg

When the mixture of non reactive gas applies pressure on a system, the pressure exerted by individual gas is termed as partial pressure. A gas will move from an area where its partial pressure is higher to an area where its partial pressure is lower.

To solve this numerical we must know that 1 atmosphere is equal to 760 mmHg.

For 21% of the oxygen gas, partial pressure will be (21*760)/100 = 159 mmHg.