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QUESTION
If it is a pure substance, classify it as an element or a compound. if it is a pure substance, classify it as an element or a compound. (a) is a compound, (d) is an element. (a) is an element, (d) is
If it is a pure substance, classify it as an element or a compound. if it is a pure substance, classify it as an element or a compound. (a) is a compound, (d) is an element. (a) is an element, (d) is a compound. both are elements. both are compounds.
