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Question

The mole fraction of N2O In a mixture of N2O and NO is 13 . The mole fraction of NO in a mixture of NO and NO2 is 34 . The two mixtures are mixed in 3:4 molar ratio. the mole fraction of NO2 in the resulting mixture is:

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Solution

In N2O+NO mixture XN2O=13
XNO=113=23
In NO+NO2 mixture XNO=34
XNO2=134=14
The two mixtures are mixed in the ratio of 3:4
XN2O=(13)×3=1XNO=23×3+34×4=2+3=5XNO2=14×4=1
Mole fraction of NO2=XNO2XN2O+XNO+XNO2=17

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