If mole fraction of solute is 0.4 and total moles are 5, how many moles of solute are present?
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Answer and explanation
Correct answer: 2 mole
The mole fraction of solute is defined as xsolute = nsolute ÷ ntotal. Rearranging gives nsolute = xsolute × ntotal. Substituting the data, nsolute = 0.4 × 5 = 2 mol, so option A is correct. Option B mistakes the fraction for an amount, option C gives the total moles, and option D incorrectly divides by the mole fraction.
Frequently asked questions
What is the correct answer to this question?
2 mole
Why is this the correct answer?
The mole fraction of solute is defined as xsolute = nsolute ÷ ntotal. Rearranging gives nsolute = xsolute × ntotal. Substituting the data, nsolute = 0.4 × 5 = 2 mol, so option A is correct. Option B mistakes the fraction for an amount, option C gives the total moles, and option D incorrectly divides by the mole fraction.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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