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It is likely that Earth's atmosphere contained a considerable amount of H2(g) when the first life forms appeared. Given the information listed in the following table: Hydrogen Compounds Homework - Answered - Due Jan 13th, 12:59 PM Based on the data, which of the following reactions involving hydrogen H2(g) and different elementary substances are energetically favored (i.e., generate products with a lower potential energy)? (you may select more than one option) (i) Multiple answers: Multiple answers are accepted for this question Select one or more answers and submit. For keyboard navigation... SHOW MORE a 2H2(g)+O2(g)2H2O(g) b H2(g)+Cl2(g)2HCl(g) c H2(g)+Br2(l)2HBr(g) d H2(g)+I2(s)2HI(g)