explain3 lawsof chemical combination
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law of conservation of mass: acc to this matter is neither created nor destroyed during chemical reaction
law of constant proportions:a chemical always contains same elements combined together in same proportion by weight
law of multiple proportions:when two elements combine to form compound the weight of one element which combined with fixed weight of others bears simple ratio to each other
law of constant proportions:a chemical always contains same elements combined together in same proportion by weight
law of multiple proportions:when two elements combine to form compound the weight of one element which combined with fixed weight of others bears simple ratio to each other
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