public void ImplicitAddNullFormulaRight()
{
ChemicalFormula formulaA = new ChemicalFormula("C2H3NO");
ChemicalFormula formulaB = new ChemicalFormula("C2H3NO");
ChemicalFormula formulaC = formulaA + NullChemicalFormula;
Assert.AreEqual(formulaC, formulaB);
}