Can we say, that Gay-Lussac's Law is similar to the Law of Conservation of Mass, but in terms of gases

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.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

gas

explanation:

smoke is the matter of a gas