Show that the sum of mole fraction of a solution is equal to one.

1.	Show that the sum of mole fraction of a solution is equal to one.
Answer» Solution :Consider a solution CONTAINING two COMPONENTS A and B whose mole fractions are `x _(A) and x _(B)` respectively. Let the number of moles of two components A and B are `n_(A) and n_(B)` respectively. `(n _(A))/(n _(A) + n _(B)), x _(B) = (n_(B))/(n _(A) + n _(B))` ` x _(A) + x _(B) = ( n _(A))/(n _(A) + n _(B)) + (n_(B))/( n _(A) + n _(B)) =1`

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