Question

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(1) What change that occures after in chemical reaction?

(2) Give some evidonces that chemical reaction was occur?



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Answer 1

Answer:

1 ) In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

2 ) Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.