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Explain what happens to the particles in a substance during a physical change.
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Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?
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Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false
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Explain what happens to the particles in a substance during a physical change....
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