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What is the rate of a chemical reaction?
a.the speed at which reactants change to products over a given time the speed at which reactants change to products over a given time
b. the amount of each reactant needed in relation to all the others the amount of each reactant needed in relation to all the others
c.the time it takes for all the reactants to become products the time it takes for all the reactants to become products
d. the energy cost to transform all reactants into products