Element Weight percentage
Natural sample Synthetic sample
Copper 51.35 51.35
Carbon 9.74 9.74
Oxygen 38.91 38.91

From the table particularly we can prove that 

A) Law of conservation of mass 

B) Law of constant proportions 

C) Law of conservation of energy 

D) Above all

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1 Answers

B) Law of constant proportions

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