The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98 × 1024kg). Which one of the two is heavier and by how many times?
ScienceClass 9CBSEAnswered 27 Mar 2026
Answer
Soln:
One mole of screws weigh = 2.475 ×1024g
= 2.475×1021 kg
Mass of the Earth / Mass of 1 mole of screws = 5.98 ×1024 kg
2.475×1021
= 2.4 ×10
Mass of earth is 2.4×103 times the mass of screws
The earth is 2400 times heavier than one mole of screws
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