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Questions in chemistry
[Jawaban] How many years would it take to count a mole of rice grains if it takes 88 seconds to count 100 rice grains?
[Jawaban] If atoms of a halogen nonmetal gain one electron, the atoms then have how many valence electrons?
[Jawaban] What is true about the atoms at the start of a chemical reaction compared to the atoms at the end of the reaction?
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