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In chemistry, what does a mole represent a count of?
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2. Atoms & Elements
Mole Concept
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What is the mass of 6.02 × 10^{23} atoms of carbon-12?
A
6 grams
B
1 gram
C
12 grams
D
24 grams
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Recognize that 6.02 \(\times\) 10^{23} atoms is Avogadro's number, which represents one mole of any substance.
Recall that the molar mass of carbon-12 is exactly 12 grams per mole, meaning one mole of carbon-12 atoms weighs 12 grams.
Since 6.02 \(\times\) 10^{23} atoms correspond to one mole, the mass of this number of carbon-12 atoms is equal to the molar mass of carbon-12.
Therefore, the mass of 6.02 \(\times\) 10^{23} atoms of carbon-12 is 12 grams.
This connects the microscopic scale (number of atoms) to the macroscopic scale (mass in grams) using Avogadro's number and molar mass.
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