kaili2268 kaili2268

18-10-2017
Chemistry

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Which of these is an indication that a chemical reaction has occurred?
A) formation of a gas
B) boiling of a substance
C) melting of a substance
D) freezing of a substance

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Slipknot Slipknot

18-10-2017

" formation of a gas" Is the answer you are looking for this is because the chemical change can happen without freezing melting or boiling a substance

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faithcraftt faithcraftt

18-10-2017

Hi! The answer to this question would be B. The boiling of a substance. xx

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