객관식
In a sample of sucrose (C12H22O11) containing 1.0 x 10^20 atoms of carbon, how many oxygen atoms are present?
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2. Atoms & Elements
Mole Concept
객관식
In what way are a mole and a dozen similar?
A
Both are SI base units.
B
Both are used only for counting atoms.
C
Both represent a specific number of items.
D
Both are units of mass.
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검증된 단계별 안내1
Understand that both a mole and a dozen are counting units used to quantify a specific number of items.
Recall that a dozen always represents exactly 12 items, regardless of what those items are.
Recognize that a mole represents a much larger, fixed number of items, specifically Avogadro's number, which is approximately \(6.022 \times 10^{23}\) entities.
Note that neither a mole nor a dozen is an SI base unit; the mole is a base unit in the SI system for amount of substance, but a dozen is a common counting unit, not an SI unit.
Conclude that the similarity lies in the fact that both represent a specific, fixed number of items, making them counting units rather than units of mass or other physical quantities.
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