Order of the reaction

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 Order of the reaction :


 1- It is the sum of powers of the concentrations in the rate law expression.

2- It is an experimentally determined value obtained from the rate of overall reaction.

3- It may be a whole number, a fraction, or zero.

4- It cannot be obtained from a balanced chemical equation.

5- The mechanism of a chemical reaction cannot be known from the order of the reaction.

6- It can change with the conditions, such as pressure, temperature and concentration.

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