Answers

2014-10-12T22:34:23+05:30
Antoine Lavoisier stated the law of coservation of mass and costant propotionin his laws of chemical reaction concept!!!!!

=D
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2014-10-13T06:50:22+05:30
The person who proporsed and verified the law of conservation f mass is Antoine Lavoisier.
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there are other scientists also. do u know