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How many neutrons does an element have if its atomic number is 55 and its mass number is 150?
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Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.
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How does carbon monoxide pose the greatest threat to humans? a. it can be produced by wood fires. b. it can be produced by home furnaces. c. it is produced by acid rain. d. it is produced by modern automobiles.
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How many neutrons does an element have if its atomic number is 55 and its mass number is 150?...
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