Multiple Choice
The number of carbon atoms in exactly 12 g of pure carbon-12 is called a:
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2. Atoms & Elements
Mole Concept
Multiple Choice
In chemistry, what does one mole represent?
A
The number of electrons in one neutral atom of an element
B
A quantity containing exactly specified entities (such as atoms, molecules, or ions)
C
The volume occupied by any gas at room temperature and pressure
D
The mass in grams of exactly one atom of an element
Verified step by step guidance1
Understand that a mole is a fundamental unit in chemistry used to count particles, similar to how a dozen counts 12 items.
Recognize that one mole represents a specific number of entities, which can be atoms, molecules, ions, or other specified particles.
Recall Avogadro's number, which is the exact number of entities in one mole, given as \(6.022 \times 10^{23}\).
Note that this number is constant and does not depend on the type of particle being counted.
Conclude that one mole corresponds to a quantity containing exactly \(6.022 \times 10^{23}\) specified entities, not the number of electrons, volume, or mass of a single atom.
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