| A | B |
|---|
| substances that undergoes change in a chemical reaction | reactants |
| new substances formed as a result of a chemical reaction | products |
| a representation of a chemical reaction in which the reactants and products are expressed as formulas | chemical equation |
| numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product | coefficients |
| an amount of a substance that contains approximately 6.02 x 10^23 particles of the substance | mole |
| the mass of one mole of a substance | molar mass |
| a chemical reaction in which two or more substances react to form a single substance | synthesis reaction |
| a chemical reaction in which a compound breaks down into two or more simpler substances | decomposition reaction |
| a chemical reaction in which one element takes the place of another element in a compound | single-replacement reaction |
| a chemical reaction in which two compounds exchange positive ions and form two new compounds | double-replacement reaction |
| a chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light | combustion reaction |
| a chemical raction in which electrons are transferred from one reactant to another | oxidation-reduction reaction |
| the energy stored in chemical bonds | chemical energy |
| a chemical reaction that releases energy to its surroundings | exothermic reaction |
| a chemical reaction that absorbs energy from its surroundings | endothermic reaction |
| the rate at which reactants into products over time | reaction rate |
| a substance that affects the rate of a chemical reaction without being used up in the reaction | catalyst |
| a state in which the forward and reverse paths of a physical or chemical change take place at the same rate | equilibrium |
| a chemical reaction in which the conversion of reactants into products and the conversion of products into reactants happens at the same time | reversible reaction |
