PPT-HOW DO WE KNOW A CHEMICAL CHANGE/REACTION HAS OCCURRED?

EVIDENCE of a CHEMICAL REACTION aka a CHEMICAL CHANGE T he decomposition of hydrogen peroxide H 2 O 2 2 H 2 O 2 2 H 2 O O 2 http wwwyoutubecomwatchv4N0m95PExHY

change chemical heat reaction chemical change reaction heat www watch youtube http aka gas color temperature signs exits changetemp

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