If 0.2 mol solute has a mole fraction of 0.25, what is the total number of moles?
Answer and explanation
Correct answer: 0.8 mol
The governing concept is mole fraction: Xsolute = moles of solute divided by total moles of solution. Rearranging gives total moles = moles of solute ÷ Xsolute. Therefore, total moles = 0.2 ÷ 0.25 = 0.8 mol. Option A is correct. The other options either repeat the given solute amount or result from using an incorrect operation or relationship.
Frequently asked questions
What is the correct answer to this question?
0.8 mol
Why is this the correct answer?
The governing concept is mole fraction: Xsolute = moles of solute divided by total moles of solution. Rearranging gives total moles = moles of solute ÷ Xsolute. Therefore, total moles = 0.2 ÷ 0.25 = 0.8 mol. Option A is correct. The other options either repeat the given solute amount or result from using an incorrect operation or relationship.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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