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What characterizes a chemical reaction?

Answer 1

#"A colour change......."#

#"...or the formation of new substances......"#

Chemical change is characterized by the formation of new substances and the making and breaking of strong chemical bonds.

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Answer 2

Ellie Andrews

A chemical reaction involves the breaking and forming of chemical bonds between atoms, resulting in the conversion of one or more substances (reactants) into different substances (products), accompanied by the release or absorption of energy. Key characteristics include changes in the composition, properties, and energy of the substances involved.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.