Answers

2016-03-17T15:27:37+05:30
Chemical reaction can mixed up well..
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  • Brainly User
2016-03-17T15:30:33+05:30
In some chemical reactions gases are evolved,that's why it's necessary to ensure that, while doing the experiment to verify the law of conservation of mass,the reaction takes place in a closed container............
Hope I helped.........ARIGATOU GOZAIMASU!

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