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Question

Mole fractions of A and B in a mixture in which 6.023×1023 molecules of A and 10.4×1023 molecules of B are present.


A

0.37, 0.37

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B

063, 0.37

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C

0.37, 0.63

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D

0.63, 0.63

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Solution

The correct option is C

0.37, 0.63


To find mole fraction, we need number of moles.

NA = Number of moles of A = 6.023×10236.023×1923=1

NB = Number of moles of B = 10.4×10236.023×1023=1.73

XA=NANA+NR=12.73=0.37

XB=NBNA+NR=1.732.73=0.63


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