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Mass of 1 atom of carbon (atomic mass 12) is approximately:
A12 g
B6.022 * 10^-23 g
C1.99 * 10^-23 g
D6.022 * 10^23 g
Answer & Solution
Correct answer: A. 12 g
1. Mass of 6.022 * 10^23 atoms is 12 g.
2. So mass of 1 atom = 12 / (6.022 * 10^23).
3. = 1.99 * 10^-23 g.
4. This matches option B.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 5 'Mole Concept and Stoichiometry'_
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