Which of the following correctly describes how rate laws are determined?
rate laws can be determined from the coefficients of balanced equations.
the rate law for an elementary step can only be determined from unimolecular reactions.
the rate law for the overall reaction is always determined by the rate law of the fastest step.
rate laws are determined through experimentation.

Rate laws are determined through experimentation.

Explanation:

Elementary reactions are reactions which takes place in single step. For elementary reactions the order is same as the stoichiometric coefficients.

For a complex reaction, the rate is determined by the slowest step.

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

k= rate constant

x = order with respect to A

y = order with respect to AB

n = x+y = Total order

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

c. is the answer

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