The % of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This proves the law of:

The % of copper and oxygen in samples of CuO obtained by different met

1.	The % of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This proves the law of:
Answer» Constant Proportion RECIPROCAL Proportion Multiple Proportion Conservation of mass SOLUTION :LAW of constat proportion