Chemistry, 10.11.2020 01:00, yootmytoot

Seth learned that matter is always conserved. So he decided to do an experiment with iron (Fe), and oxygen in the air. Seth put 13 grams of tiny iron (Fe) pieces on the windowsill. At the end of his experiment, the iron was no longer shiny. When he put it on a scale, the mass now measured 21 grams. His friend argued that matter is not conserved. Is she correct? Why or why not?

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Seth learned that matter is always conserved. So he decided to do an experiment with iron (Fe), and...