Discussion
Molarity is defined as :
Answer: A
Molarity is the moles of solute present in 1 liter of solution.
\[ M = \frac{\text{moles of solute}}{\text{litres of solution}} \]
For example, 58.5 g of sodium chloride (one mole) made up to 1 litre of solution is a 1 M solution.
Moles of solute per kilogram is molality, and it is defined per kilogram of solvent, not solution. Equivalents of solute per litre is normality. Grams of solute per litre is a mass concentration (g/L), which ignores the molar mass and so is not molarity.
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