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Question

1.0 litre of N2 and 78 litre of O2 at the same temperature and pressure were mixed together. What is the relation between the masses of the two gases in the mixture?
  1. mN2=mO2
  2. mN2=3mO2
  3. mN2=16mO2
  4. mN2=8mO2


Solution

The correct option is A mN2=mO2
22.4 L of N2 at S.T.P. = 28 g of N2
1 L of N2 at S.T.P =1.25 g of N2
Also,
22.4 L of O2 at S.T.P =  32 g of O2
78 L of O2 at S.T.P. =  1.25 g of O2
mN2=mO2

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