9 terms

Chemistry chapter 12

that portion of chemistry dealing with numerical relationships in chemical reactions; the calculation of quantities of substances involved in chemical equations
the unit used to count number of atoms, molecules, or formula units of substances
avogadro constant
the number of things in one mole of a substance; 6.02 x 10^23
molar mass
the mass of one mole of a pure substance
molecular mass
the mass in atomic mass units of one molecule of a covalent compound
formula mass
the mass in atomic mass units of one formula unit of an ionic compound
molar volume
the volume that a mole of gas occupies at a pressure of one atmosphere and a temperature of 0 degress C
ideal gas law
the equation that expresses exactly how pressure P,volume V, temperature T and the number of particles n of a gas are related; PV= nRT
empirical formula
the formula of a compound having the smallest whole number ratio of atoms in the compound