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Molarity M is defined as:

AMass per volume
BMoles of solute per kg of solvent
CRandom
DMoles of solute per liter of SOLUTION
Answer & Solution
Correct answer: D. Moles of solute per liter of SOLUTION
M = moles solute / liter of solution (mol/L = M). Temperature-dependent (volume changes). Most common in lab; not always thermodynamically robust.
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