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Air cotains 79 % N2 and 21% O2 by volume...

Air cotains `79 % N_2` and `21% O_2` by volume.If the barometric pressure is 750 mm Hg the partial pressure of oxygen is :

A

157.7 mm of Hg

B

175.5 mm of Hg

C

315.0 mm of Hg

D

None of the above

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The correct Answer is:
A
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