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Question 600028
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Mole Concept and Stoichiometry: Mole Fraction MCQ

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Mole FractionEasyQuestion 600028

Question

In a solution of 1 mol A and 4 mol B, the mole fraction of A is:
  1. A
    0.1
  2. B
    0.2
    Correct
  3. C
    0.25
  4. D
    0.8

Correct answer

0.2

Explanation

χA = nA/(nA+nB) = 1/(1+4) = 0.2. Mole fractions always sum to 1.

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