Which of the following is a clue of a chemical change? A. iron changes color when heated B. gas bubbles form in boiling water C. balls of wax form when melted wax is poured into ice water D. a gas forms when vinegar and baking soda are mixed

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A clue of a chemical change is: a gas forms when vinegar and baking soda are mixed.

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Asked 11/18/2015 8:31:00 AM

Updated 11/18/2015 8:43:57 AM

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Edited by jeifunk [11/18/2015 8:43:56 AM], Confirmed by jeifunk [11/18/2015 8:43:57 AM]

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If a material contains three elements joined in a fixed proportion, it is a(an) A. mixture. B. solution. C. atom. D. compound.

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Updated 11/18/2015 8:43:06 AM

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alfred123

If a material contains three elements joined in a fixed proportion, it is a: COMPOUND.

Added 11/18/2015 8:43:06 AM

This answer has been confirmed as correct and helpful.

Confirmed by Andrew. [11/18/2015 9:44:25 AM]

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Weegy: Wax is useful for making molds because it has a low melting point. (More)

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A substance that has high reactivity A. easily combines chemically with other substances. B. burns in the presence of water. C. displaces dissolved oxygen. D. has a high boiling point.

Weegy: A substance that has high reactivity easily combines chemically with other substances. (More)

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Updated 11/18/2015 10:01:40 AM

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