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Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon
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Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.
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Nan element’s square on the periodic table, the number with the greatest numerical value represents the
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Which statement is true about the particles of a gas when the gas changes into a liquid? (5 points)...
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