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2H2 + O2--> 2HO The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence

2H2 + O2--> 2HO 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. multiple proportions c. mass conservation O d. energy conservation

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