Why does a pipe gain mass when it rusts?
A: Matter is created during the chemical reaction.
B: Oxygen from the atmosphere bonded with the pipe to add mass to the pipe.
C: It does not gain mass because matter cannot be created.
D: Because it is going through a physical change.
C: It does not gain mass because matter cannot be created.
r u very sure?
My apologies for the confusion. Let me correct it.
B: Oxygen from the atmosphere bonded with the pipe to add mass to the pipe.
Rusting is a chemical reaction that involves the combination of iron in the pipe with oxygen from the atmosphere. This results in the formation of iron oxide (rust) which contributes to the added mass of the pipe.