The mole fraction of solute is 0.25. If total moles are 8, how many moles of solute are present?
Answer and explanation
Correct answer: 2 mol
The governing concept is mole fraction: x_solute = moles of solute divided by total moles of all components. Rearranging gives moles of solute = x_solute × total moles = 0.25 × 8 = 2 mol. Therefore, option B is correct. Option A treats the fraction as a different quantity, while options C and D do not satisfy the stated mole-fraction relationship.
Frequently asked questions
What is the correct answer to this question?
2 mol
Why is this the correct answer?
The governing concept is mole fraction: x_solute = moles of solute divided by total moles of all components. Rearranging gives moles of solute = x_solute × total moles = 0.25 × 8 = 2 mol. Therefore, option B is correct. Option A treats the fraction as a different quantity, while options C and D do not satisfy the stated mole-fraction relationship.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
