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Gustavo Siqueira · Answer 1 · 2018-01-13T18:14:35+0000

Answer:

formation of a gas

formation of a precipitate

color change

temperature change

production of light

Step-by-step explanation:

just got it right on edg.

Rob Neuhaus · Answer 2 · 2018-01-16T21:01:34+0000

1. color change: the substance will change in colour
2. Change in temperature
3. Noticeable change in odour
4. formation of precipitate
5. formation of bubbles
6.Emission of light
7.Formation of a gas.

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