Question

In a solution of three components A, B and C, mole fraction of A is 0.5 and that of C is 0.2. What is mole fraction of B?

Answer 1

A+B+C=1

0.5+B+0.2=1

0.7+B =1

B=1-0.7

B=0.3

Answer 2

Sum of mole fraction of a compound is always one.

Therefore c has mole fraction =1-0.5-0.2=0.3

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