Assuming the mass of the earth as 6.64 × 10 24 kg and the average mass of the atoms that make up the earth as 40 u (atomic mass unit), the number of atoms in the earth is approximately

Question

Assuming the mass of the earth as 6.64 × 10 24 kg and the average mass of the atoms that make up the earth as 40 u (atomic mass unit), the number of atoms in the earth is approximately, 10 30, 10 40, 10 50, 10 60

MARKS App · Accepted Answer

1 a . m . u = 1 u = 1.6 × 10 - 27 kg 40 u = 40 × 1.6 × 10 - 27 kg Number of atoms in earth, = 6.64 × 10 24 40 × 1.6 × 10 - 27 = 10 50

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