Multiple Choice
Which statement best describes the relationship between a mole and Avogadro's number?
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2. Atoms & Elements
Mole Concept
Multiple Choice
Which of the following represents the number of carbon atoms in exactly 12 g of pure carbon-12?
A
6.022 × 10^{23}
B
12.0 × 10^{23}
C
1.00 × 10^{23}
D
3.01 × 10^{23}
Verified step by step guidance1
Understand that 12 g of pure carbon-12 corresponds to exactly 1 mole of carbon atoms because the molar mass of carbon-12 is defined as 12 g/mol.
Recall that 1 mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is approximately \(6.022 \times 10^{23}\) particles per mole.
Since the problem asks for the number of carbon atoms in 12 g of carbon-12, you are essentially looking for the number of atoms in 1 mole of carbon-12.
Use the relationship: Number of atoms = (number of moles) \(\times\) (Avogadro's number), which simplifies here to \(1 \times 6.022 \times 10^{23}\) atoms.
Conclude that the number of carbon atoms in exactly 12 g of pure carbon-12 is \(6.022 \times 10^{23}\) atoms.
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