Question

PLEASE HELP! What are some examples of Law and Conservation of matter?

Answer 1

Burn something completely to ash, it appears as if matter was lost, the burnt item was destroyed, but if you collected the gases expelled and weighed them, the weight of the gas and ash produced would equal the weight of the oxygen consumed in the burning/oxidation and the weight of the original item so the matter wasn't destroyed it merely changed to a different form -- most of the solid matter became gaseous matter.