One litre of oxygen at a pressure of and two litres of nitrogen at a pressure of are…

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Problem

One litre of oxygen at a pressure of

1\,\text{atm}

and two litres of nitrogen at a pressure of

0.5\,\text{atm}

are introduced into a vessel of volume

1\,\text{L}

. If there is no change in temperature, the final pressure of the gas mixture, in atm, is: (1)

1.5

(2)

2.5

(3)

2

(4)

4