my answer would be
fluorine, chlorine, oxygen
The answer is d: Combustion, because it is the so-called combustion of methan. (Check your lesson)
Answer:
483.27 minutes
Explanation:
using second faradays law of electrolysis
O3 + M2+(aq) + H2O(l) => O2(g) + MO2(s) + 2 H+
Eo(cell) = Eo(O3/O2) - Eo(MO2/M2+)
0.44 = 2.07 - Eo(MO2/M2+)
Eo(MO2/M2+) = 1.59 V