Question

A sample of H2 is collected over water such that the combined hydrogen–water vapor sample is held at a pressure of 1 standard atmosphere. What is the partial pressure of the H2 if that of the water vapor is 2.5 kPa?
A. 103.8 kPa
B. 98.8 kPa
C. 2.5 kPa
D. 101.3 kPa


B or C???
1 atm is about 1.013*10^5 Pa or 101.3 kPa
101.3 - 2.5 = 98.8
98.8

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