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Q.

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 

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a

0.96 atm

b

1.02 atm

c

751 mm Hg 

d

21 mm Hg

answer is C.

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Detailed Solution

Pressure of O2(dry)=75121=730mmHg

=730760=0.96atm

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