Saved Bookmarks
| 1. |
Find the number of molecules per unit volume of oxygen at NTP. [Mass of an oxygen molecule=5.313 xx 10^(-26) kg, rms speed of oxygen molecles at NTP = 461.2 m/s] |
|
Answer» Solution :` p = 1.013 xx 10^(5) N//m^(2)` `p = 1/3 (Nm_(0))/(V) c_(rms)^(2)` The number of molecules PER unit volume, ` N/V = (3P)/(m_(0) c_(rms)^(2))` ` (3xx 1.013 xx 10^(5))/(( 5.313 xx10^(-26)) (461.2)^(2))` ` 2.689 xx 10^(25) ` moleclules / `m^(3)` |
|