Answer:
Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.
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Answer:
Principle quantum number.
Explanation:
Answer:
People wanted to settle there because it had good living conditions. There was rich soil, and lots of water sources.
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