A solution contains 4 mol solute and 10 mol total. What is the mole fraction of the solute?
Answer and explanation
Correct answer: 0.4
The governing formula is Xsolute = moles of solute ÷ total moles of all components. Substituting the given values gives Xsolute = 4 ÷ 10 = 0.4. Mole fraction is dimensionless and must lie between 0 and 1, so option A is correct. The values 4.0 and 10.0 are mole amounts rather than fractions, while 0.6 would be the fraction of the remaining components if their total were 6 mol.
Frequently asked questions
What is the correct answer to this question?
0.4
Why is this the correct answer?
The governing formula is Xsolute = moles of solute ÷ total moles of all components. Substituting the given values gives Xsolute = 4 ÷ 10 = 0.4. Mole fraction is dimensionless and must lie between 0 and 1, so option A is correct. The values 4.0 and 10.0 are mole amounts rather than fractions, while 0.6 would be the fraction of the remaining components if their total were 6 mol.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
