Answers

2015-07-16T21:13:59+05:30
No there is no change in mass of a substance when there is change in state because of law of conservation of mass or Dalton's first postulate
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2015-07-16T21:14:05+05:30
No . There will be no change in mass when state of the substance change. Only volume of the substance change. It is because law of conservation of mass .
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Then what about Einstien ' theory of relativity plz elaborate