please help me within five minutes

Chemistry
Tutor: None Selected Time limit: 1 Day

 The activation energy can be decreased by addition of a catalyst. 

The energy of activation equals the energy released in an exothermic reaction.

The activation energy depends upon the concentrations of reactants. 

true or false.

Jan 4th, 2015

false

true

true

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Jan 4th, 2015

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