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If 18 g of glucose has 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 obtained by dividing the given mass by the molar mass: n = m/M. Substituting the values gives n = 18 g ÷ (180 g mol⁻¹) = 0.1 mol. The gram units cancel, leaving the unit mol. Therefore, 18 g of glucose represents one-tenth of a mole, and option A is correct.

Related tags

Mole CalculationGlucoseMolar MassStoichiometryMole Concept And Molar MassSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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