Nitrogen(75.5 kPa), oxygen (19.2 kPa), carbon dioxide(0.05 kPa) and water vapor(4.3 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa?
See Dalton's Law of partial pressure. That law says that the total pressure is the sum of the partial pressures of each gas.
To find the total atmospheric pressure, you need to add up the partial pressures of all the atmospheric components. The total atmospheric pressure is the sum of the pressures contributed by nitrogen, oxygen, carbon dioxide, and water vapor.
Total atmospheric pressure = Nitrogen pressure + Oxygen pressure + Carbon Dioxide pressure + Water vapor pressure
Given:
Nitrogen pressure = 75.5 kPa
Oxygen pressure = 19.2 kPa
Carbon Dioxide pressure = 0.05 kPa
Water vapor pressure = 4.3 kPa
Adding up all the pressures:
Total atmospheric pressure = 75.5 kPa + 19.2 kPa + 0.05 kPa + 4.3 kPa
Total atmospheric pressure = 99.05 kPa
So, the total atmospheric pressure is 99.05 kPa.