Multiple Choice
In the mole concept, how many atoms are present in mole of carbon (C)?
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2. Atoms & Elements
Mole Concept
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In the mole concept, what does 1 mole of any substance represent?
A
Exactly liters of the substance at all temperatures and pressures
B
Exactly gram of the substance
C
Exactly elementary entities (Avogadro’s number)
D
Exactly grams of the substance
Verified step by step guidance1
Understand that the mole is a fundamental unit in chemistry used to count particles, such as atoms, molecules, or ions, similar to how a dozen counts 12 items.
Recall that 1 mole of any substance contains a specific number of elementary entities (atoms, molecules, ions, etc.), which is a fixed constant known as Avogadro's number.
Avogadro's number is defined as \$6.022 \times 10^{23}$ entities per mole, meaning 1 mole of any substance has exactly this many particles.
Note that the volume of 22.4 liters applies only to 1 mole of an ideal gas at standard temperature and pressure (STP), not to all substances or conditions.
Also, 1 mole does not correspond to 1 gram or 12 grams of a substance; the mass of 1 mole depends on the substance's molar mass (grams per mole).
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