Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released). Strongest bond A–B A–A B–B C–C B–C A–C Weakest bond a. B2+C2-->2BCb. A+BC-->AB+Cc. AB+C-->AC+Bd. A2+C2-->2ACe. A2+B2-->2AB

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.