write a short note on chemical reactions
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A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. ... If a physical change occurs, the physical properties of a substance will change, but its chemical identity will remain the same.
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A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
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