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Question

A sample of O2 gas is collected over water at 23 C at a barometric pressure of 751 mm Hg (vapour pressure of water at 23 C is 21 mm Hg). The partial pressure of O2 gas in the sample collected is ......


A

21 mm Hg

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B

751 mm Hg

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C

0.96 atm

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D

1.02 atm

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Solution

The correct option is C

0.96 atm


Pressure of O2(dry) = 751 - 21 = 730 mm Hg = 730760 = 0.96 atm


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