Answer: so the Effect of Catalysts on the Activation Energy Barrier. Catalysts provide a new reaction pathway in which a lower A.E. is offered. A catalyst increases the rate of a reaction by lowering the activation energy so that more reactant molecules collide with enough energy to surmount the smaller energy barrier.hope this helps
        
             
        
        
        
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because they have to work less to find food
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Answer:
d solute in the tubes changing
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What might happen if your rate of breathing decreased?
Rate of breathing decreases as a result of low intake of oxygen due to cardiovascular problem which affects the heart not to pump blood accurately, hence; decreases breathing. 
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Answer: Wear eye protection, rubber gloves
Handle acid with care and follow CLEAPSS or SSERC guidelines on its use.