| A | B |
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| Reaction | a process in which one or more substances are changed into one or more new substances by the reorganization of component atoms |
| Chemical Equation | A representation of a chemical reaction using the formulas of the starting substances that react and the new substances that are formed |
| Reactant | the starting substance of a chemical reaction shown to the left of the reaction arrow |
| Product | the new substance formed by a chemical reaction. It is shown to the right of the reaction arrow |
| Coefficient | the number written in front of the chemical formulas in a balanced chemical equation; coefficients indicate the relative numbers of reactants and products in the reaction |
| Conservation of matter | matter can neither be created nor destroyed, simply rearranged |
| Mole | the number equal to the number of carbon atoms in exactly 12 grams of pure carbon-12: Avogadro’s number. One mole represents 6.02 X 10 23 units |
| Conservation of matter | matter can neither be created nor destroyed, simply rearranged |
| Molar mass | the mass in grams of one mole of a compound |
| Molar volume | the volume of one mole of an ideal gas; equal to 22.4L at standard temperature and pressure |
| Molar mass | the mass in grams of one mole of a compound |
| Stoichiometry | the process of using a balanced chemical equation to determine the relative masses of reactants and products involved in a reaction |
