The molarity measures the concentration of the amount of a substance dissolved in a liquid. The correct option is D.
What is molarity?
Molarity is the measure of the concentration of any solute per unit volume of the solution. Molarity can be calculated by dividing the moles and the volume of a substance. It is denoted by capital M.
The equation is M = n / v
The molarity measured the concentration of a substance present in a liquid. The molality calculates the substance present in solid form.
Thus, the correct option is D. The amount of a substance dissolved in a liquid.
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The question is incomplete. Your most probably complete question is given below:
A. How many isotopes of an element there are
B. The number of grams in a molar mass unit
C. The relative amounts of atoms in a molecule
D. The amount of a substance dissolved in a liquid
