Catalyst
A compound that increases the rate of a reaction without itself undergoing a permanent change 
Chemical equilibrium
A dynamic state where the concentrations of all reactants remain constant.
Reactants
to the left of the arrow in a chemical equation
products 
to the right of the arrow in a chemical equation
mole
macroscopic version of a molecule, equal to 6.02 times ten to the twenty third
Formula Weight
sum of the atomic weights of all the atoms in the molecular formula
One of Three things are required for a reaction to occur
Molecules must collide.
One way to increase the rate of a reaction
Increase Concentration
One way to decrease the rate of a reaction
decrease temperature


___ C4H12 +  ___ O2 -> ___ CO2 + ___ H2O 

__ MgCl2 + ___ NaOH ->  __ NaCl  +  Mg(OH)2

FW CO2
FW Na3PO4