The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence for the law of
A. definite proportions.
B. energy conservation.
C. mass conservation.
D. multiple proportions.
Answer:C
The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence for the law of
A. definite proportions. B. energy conservation. C. mass conservation. D. multiple proportions.