The number of units, which are used to express concentration of solutions from the following is

(Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.)

Question

The number of units, which are used to express concentration of solutions from the following is

(Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.)

Canvas Classes · Accepted Answer

Strategy:
 Distinguish between absolute amounts (moles, grams) and relative amounts/concentrations (molarity, molality, etc.).

Evaluation:
1. Mass percent: Concentration unit.
2. Mole: Amount of substance (not a concentration unit).
3. Mole fraction: Concentration unit.
4. Molarity: Concentration unit.
5. ppm: Concentration unit.
6. Molality: Concentration unit.

Total concentration units = 5.

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