Composition of Atmospheric Air
|
% |
% |
Partial Pressure |
| Gas |
by Weight |
by Volume |
mbar |
| N2 |
75.51 |
78.1 |
792 |
| O2 |
23.01 |
20.93 |
212 |
| Ar |
1.29 |
0.93 |
9.47 |
| CO2 |
0.04 |
0.03 |
0.31 |
| Ne |
1.2x10-3 |
1.8x10-3 |
1.9x10-2 |
| He |
7x10-5 |
7x10-5 |
5.3x10-3 |
| CH4 |
2x10-4 |
2x10-4 |
2x10-3 |
| Kr |
3x10-4 |
1.11x10-4 |
1.1x10-3 |
| N2O |
6x10-5 |
5x10-5 |
5x10-4 |
| H2 |
5x10-6 |
5x10-5 |
5x10-4 |
| Xe |
4x10-5 |
8.7x10-6 |
9x10-5 |
| Totals |
100% |
100% |
1,013 |
| 50% RH at 20°C |
1.6 |
1.15 |
11.7 |
- RH=Relative Humidity
- Taking into account the relative humifity, the total pressure - as
read by the barometer - therefore amounts to 1,013+11.7-1025mbar
Pumping Speed Units
| Pressure (Pa) |
l/s |
l/min |
ft/min |
m3/hr |
| 1 l/s |
1 |
60 |
2.12 |
3.6 |
| 1 l/min |
0.0167 |
1 |
0.0353 |
0.06 |
| 1 ft/min |
0.472 |
28.32 |
1 |
1.7 |
| 11 m3/hr |
0.278 |
16.67 |
0.589 |
1 |