When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle. If the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3.2 kilopascals, what is the partial pressure of the hydrogen?

A. 93.9 kPa
B. 98.1 kPa
C. 100.3 kPa
D. 104.5 kPa

Partial pressure refers to the pressure exerted by a single component of a mixture of gases, assuming that the gas behaves ideally. It represents the hypothetical pressure that the individual gas component would exert if it occupied the same volume alone at the same temperature. the partial pressure of hydrogen in the mixture is 93.9 kilopascals (option A).

To determine the partial pressure of hydrogen in the mixture, we need to subtract the vapor pressure of water from the total pressure in the collecting bottle.

Partial Pressure of Hydrogen = Total Pressure - Vapor Pressure of Water

Total Pressure = 97.1 kilopascals

Vapor Pressure of Water = 3.2 kilopascals

Partial Pressure of Hydrogen = 97.1 kPa - 3.2 kPa = 93.9 kPa

Therefore, the partial pressure of hydrogen in the mixture is 93.9 kilopascals (option A).

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