A 3gm sample of gas assumed to be either NO or N2O or a mixture was found to exert 1.642 atm &occupying 1.132 lit. at 300 K. Calculate the composition of mixture by mole & by weight.
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Volume percent can be approximated to mole percent as volume is directly proportional to the number of moles.
Volume percent of the gas =40 %
Mole percent of the gas =40 %
Mole fraction of the gas =
100
40
=0.4
The partial pressure of a gas is the product of its mole fraction and total pressure. It is
=0.4×5atm=2atm.
Hence, the partial pressure of the gas is 2 atm.
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