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Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.
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An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.
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What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?
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What is the name of the enzyme that forms at the start of transcription?
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Linnaeus created seven levels of classification.
What are the names of the seven levels?
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