Which statement about reaction rates is true?

a. a catalyst slows down the reaction rate.
b. changing the surface area affects the reaction rate.
c. changing the amount of reactants will not change the reaction rate.
d. changing the temperature cannot speed up a reaction rate.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".