Chemistry H

"When you pulled the steel wool apart, you found that the mass was unchanged. When you heated the steel wool, you found that the mass changed. Explain."

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  1. A little short on specifics but I suppose you separated the steel wool by pulling (a physical process which doesn't change the mass) but heat it (I suppose it caught on fire) and this caused oxidation so it changed mass because oxygen was added.

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  2. The mass was unchanged when the steel wool was pulled apart because it has the same number of properties split in two. The mass changed when the steel wool was burnt because when the fire heated up the steel wool, oxygen got caught inside the openings of the wool and closed it.

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  3. the mass changed because he put the matches on the steel wood he burn the steel wood is end or slow

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  4. When you pull the steel wool apart there wasn`t changed the mass

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