. Why does a pipe gain mass when it rusts? * 1 point Matter is created during the chemical reaction. Oxygen from the atmosphere bonded with the pipe to add mass to the pipe. It does not gain mass because matter cannot be created. Because it is going through a physical change.

Answer 1

It does not gain mass because matter cannot be created. Rusting occurs when iron in the pipe reacts with oxygen in the atmosphere to form iron oxide. The mass of the iron oxide produced will be the same as the mass of the iron and oxygen that reacted to form it. Therefore, the pipe does not gain mass during the rusting process.