How many nonbonding electron pairs are there in the lewis structure of the peroxide ion, o22−?

There is 6 non - bonding pairs.
Let me show you one easy method to do this.
o22-, oxygen valence electron = 6 here we have two so total 12, and -2 that means we add electrons so it’s all equal to 14 right.
whenever need to find lone pair, subtract the number you get with the lowest multiple of 8.
here we total 14 valence electron right so lowest multiple of 8 would be 8.
so 14 - 8 = 6 and that is our answer.
Let me know if you have Problem with chemistry.

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood. 

Ibelieve it is b. proton.hope my answer has you : )