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How many moles of HCl are in 100 mL of 0.5 M HCl?
A0.5 mole
B0.05 mole
C5 moles
D50 moles
Answer & Solution
Correct answer: A. 0.5 mole
1. Molarity = moles / volume (in litres).
2. Volume = 100 mL = 0.1 L.
3. Moles = molarity * volume.
4. = 0.5 * 0.1 = 0.05 mole.
5. So 100 mL of 0.5 M HCl contains 0.05 mole of HCl.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 5 'Mole Concept and Stoichiometry'_
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