Imagine carefully weighing a metal can, leaving it out in the rain for weeks and weeks until it was very rusted, and then carefully weighing it again. Would the can be heavier or lighter after it was rusted?

heavier! ( depends what type of metal can)

Explanation:

Rusting has to do something with corrosion and involves oxygen.So basically, when oxygen is added to the system process, this what makes the metal can become heavier.

answer; /// i do believe the correct answer is (

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!