If 5 g of a solute corresponds to 0.050 mol, what is its molar mass?
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Answer and explanation
Correct answer: 100 g mol⁻¹
The molar mass formula is M = mass ÷ amount in moles. Substituting the given values gives M = 5 g ÷ 0.050 mol = 100 g mol⁻¹. Therefore, option C is correct. The decimal 0.050 equals 5 hundredths of a mole, so dividing 5 by 0.05 gives 100 rather than 0.25 or 50. The unit is grams per mole.
Frequently asked questions
What is the correct answer to this question?
100 g mol⁻¹
Why is this the correct answer?
The molar mass formula is M = mass ÷ amount in moles. Substituting the given values gives M = 5 g ÷ 0.050 mol = 100 g mol⁻¹. Therefore, option C is correct. The decimal 0.050 equals 5 hundredths of a mole, so dividing 5 by 0.05 gives 100 rather than 0.25 or 50. The unit is grams per mole.
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.
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