a substance X is burnt in the presence of oxygen to get a substance why is this a chemical change justify your answer is there a difference in weight between X and Y give reason
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a substance X is burnt in the presence of oxygen to get a substance why is this a chemical change justify your answer is there a difference in weight between X and Y give reason
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Answer:
chemical change due to breaking old bonds and formed new bonds
no weight change acc. to law of conservation by mass