Now works fully. This program solves 30 different science problems. For example: molar mass, mols-atoms, atoms-mol, mass-mols, mols-mass, percent by mass composition, Empirical and Molecular Formulas, Formula of Hydrated Compounds, Mols needed Formula, Limiting and Excess Reactant, Percent Yeild, Pressure Converter, Gas Laws, Effusion, Law of Partial Pressure, Ideal Gas Law, Vol-Vol, Vol-Mass, Mass-Vol for Gas Stoichiometry, Decays, and Half-lifes. All very fast. Please read Sci-Math Explained for the instructions.