An Introduction to Modern Astrophysics · Problem 19.17

The Planetary System — Carroll & Ostlie

Physics — Astrophysics · nitrogen-number-density

Problem

Taking the density of air to be

1.3

kg m

^{-3}

near the surface of Earth, show that the number density of nitrogen molecules is approximately

2 \times 10^{25}

^{-3}

, as given in Example 19.3.3.