reynbabies2 reynbabies2

03-11-2021
Chemistry

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How can you identify gas in a chemical reaction without observing the atoms or molecules?

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sarahjeylani90 sarahjeylani90

03-11-2021

Answer:

There are five signs of a chemical change:

Colour Change.

Production of an odour.

Change of Temperature.

Evolution of a gas (formation of bubbles)

Precipitate (formation of a solid).

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