Final answer:
To match the correct units, atomic mass is measured in amu, molarity is measured in mol/liter, and molar mass is measured in g/mol. Atomic mass and molar mass have the same numeric value, but different units. Molarity describes solution concentration in terms of mols of solute per liter of solution.
Step-by-step explanation:
To match the terms to their units:
- A. Atomic mass - This is measured in atomic mass units (amu).
- B. Molarity - This is the concentration of a solution expressed in moles of solute per liter of solution, thus the unit is mol/liter.
- C. Molar mass - This refers to the mass of one mole of a substance. It is measured in grams per mole (g/mol).
Therefore, the matches are:
- A. Atomic mass - 2. amu
- B. Molarity - 1. mol/liter
- C. Molar mass - 3. g/mol
The atomic mass unit (amu) is defined as a mass exactly equal to one twelfth the mass of one carbon-12 atom. On the other hand, the molar mass can be found by looking at the atomic mass on a periodic table and it has units of g/mol. It is used as a conversion factor between grams and moles. The term molarity is used to describe the concentration of a substance in solution, with the unit of M or moles/liter, which could also be represented with square brackets when referring to the concentration of a particular ion or molecule in solution.