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Per NCERT, since the mass of one ¹²C atom is 1.992648 × 10⁻²³ g and one mole of carbon weighs 12 g, the number of atoms in one mole is which value?
A12 × 10²³
B6.022 × 10²³ (Avogadro's number)
C6.02 × 10⁻²³
D1.992648 × 10²³
Answer & Solution
Correct answer: B. 6.022 × 10²³ (Avogadro's number)
Per NCERT §1.8, N_A = 12 / (1.992648 × 10⁻²³) = 6.022 × 10²³. The famous Avogadro number.
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