Question

Nitrogen makes up 78.08% of the volume of Earth's atmosphere, and oxygen makes up 20.95% of the volume. The total air pressure at sea level is 101.3 kPa. From this information, what can be calculated?
A. The parts per million, or number of molecules per 1 million molecules or other particles, of nitrogen and oxygen in Earth's atmosphere

B. The sum of the partial pressures of other gases (not nitrogen or oxygen) in Earth's atmosphere at sea level

C. The partial pressure of nitrogen and oxygen in Earth's atmosphere at sea level

D. All of the other answer choices

Answer 1

D. All of the other answer choices
In the case of gases, the molar fraction is equivalent to the volume fraction which is also equal to the partial pressure fraction. Therefore, all of the given questions may be answered using the data that has been provided.