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What volume of a 1.50 M KBr solution contains 0.555 mol of KBr?
A0.370 L
B2.70 L
C0.833 L
D3.70 L
Answer & Solution
Correct answer: A. 0.370 L
1. Rearranging the molarity definition, volume equals moles divided by molarity.
2. Substituting gives 0.555 mol / 1.50 mol/L.
3. The division yields 0.370 L of solution.
4. Units check: mol divided by mol per litre leaves litres.
5. The value 0.833 L multiplies the two numbers instead of dividing, and 2.70 L inverts the ratio.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 3 "Composition of Substances and Solutions", section 3.3 Molarity_
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