create_2N2_O2_2N2O: function() {
   return new SynthesisEquation( 2, MoleculeFactory.N2(), 1, MoleculeFactory.O2(), 2, MoleculeFactory.N2O() );
 },
 create_2NO_N2_O2: function() {
   return new DecompositionEquation( 2, MoleculeFactory.NO(), 1, MoleculeFactory.N2(), 1, MoleculeFactory.O2() );
 },
 create_N2_3H2_2NH3: function() {
   return new SynthesisEquation( 1, MoleculeFactory.N2(), 3, MoleculeFactory.H2(), 2, MoleculeFactory.NH3() );
 },
 create_2NH3_N2_3H2: function() {
   return new DecompositionEquation( 2, MoleculeFactory.NH3(), 1, MoleculeFactory.N2(), 3, MoleculeFactory.H2() );
 },