If 0.01 mol of a solute has a mass of 1.8 g, what is its molar mass?
Answer and explanation
Correct answer: 180 g mol⁻¹
Molar mass is the mass of one mole of a substance and is calculated using M = m/n, where m is mass in grams and n is amount in moles. Here, M = 1.8 g ÷ 0.01 mol = 180 g mol⁻¹. Dividing by 0.01 is equivalent to multiplying by 100. Hence, the correct answer is option C, and the unit confirms that the result is a molar mass.
Frequently asked questions
What is the correct answer to this question?
180 g mol⁻¹
Why is this the correct answer?
Molar mass is the mass of one mole of a substance and is calculated using M = m/n, where m is mass in grams and n is amount in moles. Here, M = 1.8 g ÷ 0.01 mol = 180 g mol⁻¹. Dividing by 0.01 is equivalent to multiplying by 100. Hence, the correct answer is option C, and the unit confirms that the result is a molar mass.
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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