Q29Long answer
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?
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One mole of screws weigh = 2.475 ×1024g = 2.475×1021 kg Mass of the Earth 5.98 ×10 24 kg = = 2.4 ×103 Mass of 1 mole of screws 2.475 × 10 21 kg Mass of earth is 2.4×103 times the mass of screws The earth is 2400 times heavier than one mole of screws.