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20 March, 03:06

When a piece of steel wool is burned it gains mass. Which explanation is consistent with the law of conservation of mass? a) Matter was created during the chemical reaction. b) Heat changed into matter. c) A chemical change did not take place. d) Matter from the air combined with the steel wool.

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  1. 20 March, 05:19
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    Burned piece of steel wool does not gain mass. So only d could be true.
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