If molarity is 0.25 M and volume is 2 L, how many moles of solute are present?
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Answer and explanation
Correct answer: 0.5 mole
Molarity is defined as moles of solute per litre of solution: M = n/V. Rearranging gives n = M × V. Substitution yields n = 0.25 mol L⁻¹ × 2 L = 0.50 mol, so option A is correct. The litre units cancel, leaving moles. Options B and C merely repeat one given value, while D results from an incorrect operation.
Frequently asked questions
What is the correct answer to this question?
0.5 mole
Why is this the correct answer?
Molarity is defined as moles of solute per litre of solution: M = n/V. Rearranging gives n = M × V. Substitution yields n = 0.25 mol L⁻¹ × 2 L = 0.50 mol, so option A is correct. The litre units cancel, leaving moles. Options B and C merely repeat one given value, while D results from an incorrect operation.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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