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Ch. 5 - Chemistry51

Chapter 5 - Chemical Reactions

TermDefinition
Chemical change chemical reaction—converts one substance into another.
physical change alters the physical state of a substance without changing its composition.
chemical equation is an expression that uses chemical formulas and other symbols to illustrate what reactants constitute the starting materials in a reaction and what products are formed.
Chemical reactions involve breaking bonds in the starting materials, called reactants, and forming new bonds in the products.
reactants are written on the left
products are written on the right
coefficients show the number of molecules of a given element or compound that react or are formed.
law of conservation of mass states the atoms cannot be created or destroyed in a chemical reaction.
Created by: 725650999