alleryStart learning →A solution contains 0.444 mol of CoCl2 in 0.654 L. What is its molarity?
A1.47 M
B0.290 M
C0.0679 M
D0.679 M
Answer & Solution
Correct answer: D. 0.679 M
1. Molarity is defined as moles of solute per litre of solution.
2. Substituting gives 0.444 mol / 0.654 L.
3. The division yields 0.679 M.
4. Sanity check: less than a mole spread over more than half a litre must land between 0.5 and 1 M.
5. The value 1.47 M inverts the ratio, and 0.290 M multiplies instead of dividing.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 3 "Composition of Substances and Solutions", section 3.3 Molarity_
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