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chemistry

A rigid tank contains of nitrogen at . Sufficient quantity of oxygen is supplied to increase the pressure to , while the temperature remains constant. Amount of oxygen supplied to the tank is :

A

B

C

D

Answer

The amount of oxygen added to increasew the pressure from atm to atm will be kg.

From the gas law we know that,


Since and are constant here,


Since pressure is increased by times, hence number of moles should also increase by times.

So, oxygen added should be equal to half the nymber of moles of nitrogen.

Number of moles of nitrogen in kg moles

Hence, number of moles of oxygen moles

One mole of oxygen weight

  moles of oxygen weight

Hence the amount of oxygen added to increase the pressure from atm to atm will be .

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