Which of the following is considered to be an air pollutant that is reduced by the use of catalytic converters in automobiles? A. sulfur oxides
B. nitrogen oxides
C. oxygen
D. carbon monoxide
E. carbon dioxide

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.