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What are three common clues that a chemical change has occurred?
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Some clues to tell if the change is chemical: the object would change color, the new substance isn't reversible (it doesnt turn back to what it was before), there's gas formation, there is heat ...
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User: What are three common clues that a chemical change has occurred?

Note: What are three common clues that a chemical change has occurred? precipitate forms, color change, heat and light is given off, [ gas is formed usually hydrogen or co2 Read More http://wiki.answers.com/Q/The_three_changes_that_occurred_in_1920 ]
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Weegy: Some clues to tell if the change is chemical: the object would change color, the new substance isn't reversible (it doesnt turn back to what it was before), there's gas formation, there is heat released or absorbed
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Education|No Subcategories|Expert answered|Rating 0| 7/6/2012 4:51:47 PM
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