Why is reaching activation energy necessary? reactants require a minimum amount of energy to start to break a chemical bond. products require a minimum amount of energy to start to break a chemical bond. reactants must have the maximum amount of energy to start to break a chemical bond. products must have the maximum amount of energy to start to break a chemical bond.

Reaching activation energy is necessary because reactants require a minimum amount of energy start breaking a chemical bond.

Explanation:

Activation energy is the minimum amount of energy required by the reactants to initiate a chemical reaction. The unit of activation energy is joule or  kilo joule per mole or kilo calories per mole. Activation energy depends on temperature.

The temperature dependence of activation energy is given  by Arrhenious equation. Activation energy is a threshold value of energy. For any reaction to occur this is the minimum amount of energy required.

the answer is 12 as i may remember

: )

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over