Question

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(1) State and explain Avogadro's law.
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(2) How many grams does an atom of hydrogen weigh ?
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Answer 1

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1. Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

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2. The weight of 1 atom of hydrogen is calculated as 1.66058 × 10-²⁴ grams.

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