Jaden49ers Jaden49ers

07-11-2020
Chemistry

contestada

Which evidence is an indication that a chemical reaction has occurred?

A)formation of a gas

B)melting of a substance

C)boiling of a substance

D)freezing of a substance

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toffeenjs toffeenjs

07-11-2020

A. Formation of a gas. You can tell a chemical reaction has occurred through: formation of a precipitate, formation of a gas (also known as bubbles) unexpected color change, unexpected odor change, temperature change.

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carlosuribe12 carlosuribe12

13-10-2021

Answer:

a

Explanation:

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