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Hydrogen is collected over water at 22^(...

Hydrogen is collected over water at `22^(@)C` and a barometer reading of 740 mmHg. If 300 mL of hydrogen is collected, with expression will give the volume of dry hydrogen at the same temperature and pressure?
`{:("Compound","Vapour Pressure at" 22^(@)C),(H_(2)O,20 mmHg):}`

A

`300mLxx(740mmHg-20mmHg)/(740mmHg)`

B

`300mLxx(740mmHg+20mmHg)/(740mmHg)`

C

`300mLxx(740mmHg)/(740mmHg-20mmHg)`

D

`300mLxx(740mmHg)/(740mmHg+20mmHg)`

Text Solution

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The correct Answer is:
a
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