Stack #66027
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| physical property | a characteristic of a substance that does not involve a chemical change, such as denstity colo hardness
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| chemical property | a property of matter that describes a substances ability to participate in chemical change
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| reactant | asubstance or molcule that participatesin a chemical reaction
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| product | a substance that forms in a chemical reaction
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| law of conservation of mass | the law that states that energy cannot be created or destroyed but can be changedfrom one substance 2 another
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| endothermic | a chemicl reaction that requiers heat
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| exothermic | a chemical reaction that releases heat
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| law of conervation of energy | the law that states energy canot be created or destroyed but can be changed from one form to another
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tom2the4th