Question

2. Give two characteristics that determines the occurrence of a chemical reaction​

Answer 1

Answer:

Characteristics=>

✨evolution of gas

✨formation of precipitate

✨change in temperature

✨change in state

.✨change in color

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Answer 2

Answer:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.