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Chemistry, 02.09.2019 10:30 Svetakotok

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

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Which of the following is a clue of a chemical change?
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