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A compound was found to contain carbon and hydrogen in the ratio of carbon 12 g and hydrogen 4 g. What is the formula of the compound?
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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