1.balancing chemical equations, moles, molar mass, Avogadro’s number, activation energy, reaction rate. balancing chemical equations: adding coefficients in front of each product and reactant in a chemical equation to make sure the number of each atom is equal in the reactant and product side Moles: is the quantity equal to 6.02 x 10^23 of items Molar mass: mass in gram of one mole of a pure substance Avogadro’s number is equal to 6.02 x 10^23Activation energy is the minimum energy required to initiate a reaction Reaction rate is how fast the reaction occurs at a time