How does radiant heat from the sun affect the water cycle? a. it causes precipitation. b. it causes evaporation. c. it causes cloud formation. d. it causes surface run-off.

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.