:at a certain temperature this reaction follows first-order kinetics with a rate constant of 0.00771 nh, oh(aq) - nh, (aq) +h,0(aq) suppose a vessel contains nh oh at a concentration of 1.42 m. calculate how long it takes for the concentration of nh oh to decrease to 17.0% of its initial value. you may assume no other reaction is important round your answer to 2 significant digits. x 5 ?

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".

the correct answer to this question is 2

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