A) because when gas is produced it changes chemical form whereas the chemical change is obvious.
Answer:
Its C
Explanation:
Got 100% on test edge 2020
Water can't cool at a single temperature. It must start at a higher temperature, and drop to a lower temperature in order to cool. Unless we know the other temperature, there is no way to calculate the amount of thermal energy released.
I think the charge is +2
Hope this helps
Gasoline would be a mixture if I recalled
