A glucose sample has a mass of 18 g and a molar mass of 180 g mol⁻¹. How many moles of glucose are present?
Answer and explanation
Correct answer: 0.1 mol
The number of moles is calculated by dividing the given mass by the molar mass: n = m/M. Therefore, n = 18 g ÷ 180 g mol⁻¹ = 0.1 mol. The gram units cancel appropriately, leaving the unit mol. Thus, the sample contains 0.1 mole of glucose. This is a direct application of the mole concept and molar mass relationship.
Frequently asked questions
What is the correct answer to this question?
0.1 mol
Why is this the correct answer?
The number of moles is calculated by dividing the given mass by the molar mass: n = m/M. Therefore, n = 18 g ÷ 180 g mol⁻¹ = 0.1 mol. The gram units cancel appropriately, leaving the unit mol. Thus, the sample contains 0.1 mole of glucose. This is a direct application of the mole concept and molar mass relationship.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Some Basic Concepts of Chemistry. Topic: Mole concept and molar mass.
