In general chemistry, what does one mole represent?

• A. A solution concentration of $1$ gram of solute per liter of solution
• B. The volume occupied by any gas at standard temperature and pressure, regardless of amount
• C. A quantity containing exactly $6.022\times {10}^{23}$ elementary entities (Avogadro’s number)
• D. The mass of a substance equal to its atomic number expressed in grams

Answer: (C)

Verified step by step guidance

1. Understand that a mole is a fundamental counting unit in chemistry, similar to a dozen but much larger.
2. Recall that one mole represents a specific number of elementary entities, such as atoms, molecules, or ions.
3. Identify Avogadro's number, which is the exact number of entities in one mole, given as \$6.022 \times 10^{23}$.
4. Recognize that this definition is independent of the type of substance or its mass, volume, or concentration.
5. Conclude that one mole corresponds to a quantity containing exactly \$6.022 \times 10^{23}$ elementary entities, which is the correct conceptual definition.