A candle weighs 25 grams before burning. After burning for 10 minutes, the candle now weighs 17 grams. Using the Law of Conservation, explain how this is possible.

Explanation:

These are some unaccounted mass that was involved.

According to the law of conservation "matter is neither created nor destroyed but can be combined with one another".

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.