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Formulas & Equations

Chemistry Chapter 3

QuestionAnswer
the sum of the atomic masses of all the atoms in a molecule molecular mass
the sum of the atomic masses of all atoms in a formula unit of a compound formula mass
the quanitity of a given substance that contains as many molecules or formula units as the number of atoms in exactly 12 g of carbon-12. The amount of substance containing Avogadro's number of molecules or formula units. mole (mol)
the number of atoms in a 12-g sample of carbon-12, equal to 6.02 x 10^23 to three significant figures Avogadro's number
the mass of one mole of substance. In grams, it is numerically equal to the formula mass in atomic mass units. molar mass
the mass percentages of each element in a compound. percentage composition
parts per hundred parts of the total, by mass mass percentage
the formula of a sub-stance written with the smallest integer (whole-number) subscripts empirical (simplest) formula
the calculation of the quantities of reactants and products involved in a chemical reaction stoichiometry
the reactant that is entirely consumed when a reaction goes to completion limiting reactant (reagent)
the maximum amount of product that can be obtained by a reaction from given amounts of reactants theoretical yield
the actual yield (experimentally determined) expressed as a percentage of the theoretical yield (calculated) percentage yield
Created by: 723851979
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