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Physics, 12.07.2019 18:40 deontehiggins42

How can you be certain that a chemical change has occurred? a) there is at least one substance that was not present before the change b) the amount of measurable material is different after the change c) the change substance have become warmer d) at least one substance undergoes a change of state

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How can you be certain that a chemical change has occurred? a) there is at least one substance that...
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