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Difference between Order and Molecularity (Order vs Molecularity)

Order


1. It is an experimental quantity

2. It is the sum of the powers to which the concentration terms are raised in the rate law equation

3. It may have fractional values

4. It can be Zero
Molecularity

1. It is a theoretical concept

2. It is the number of species undergoing simultaneous collision in the reaction

3. It has only whole number values

4. It cannot be zero