Answer:
Miles (mi) or kilometers (km)
Explanation:
This is a big distance and it needs to be measured using a large unit of measurement, unlike feet, yards, or meters.
Well... There is (aq) for every Formula on there. There is also hydroxide in the formulas.
H2O2 Is a chemical compound called hydrogen peroxide
I think the answer is a and c
I
Should be 33. but I habe no clue