Question

Nitrogen (80 kPa), oxygen (21.0 kPa), carbon dioxide (0.03 kPa), and water vapor are the usual components of air. What is the partial pressure of water in mm Hg if the total atmospheric pressure in 1.00 atm?

how many kPa in 1 atm?

Subtract the sum of all the others from that amount. Then convert back to mm Hg.

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