The air around us has 78% nitrogen and 21% oxygen.If the pressure is 1 atm,the pressure due to oxygen is
A)0.21 atm
B)0.78 atm
C)1 atm
D)0.5 atm
E)0.67 atm

Question

Quizplus · Accepted Answer

The pressure due to oxygen in the air can be calculated using Dalton's Law of Partial Pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases. Given that oxygen makes up 21% of the air and the total pressure is 1 atm, the pressure due to oxygen is 0.21 atm (21% of 1 atm).

The Air Around Us Has 78% Nitrogen and 21% Oxygen