Chemistry

Calculate AFR, lambda, rich or lean status, and stoichiometric difference for gasoline, E85, diesel, and custom fuels.

Calculate pKa from Ka, buffer pH and concentrations, or a monoprotic weak-acid measurement. Convert pKa to Ka.

Calculate percent ionic character from electronegativity or dipole data, and solve backward for Delta EN with clear chemistry notes.

Find element mass percentages from a chemical formula, with molar mass, step table, and a percent-total check.

Enter a chemical formula to calculate molar mass in g/mol and check element counts, mass contributions, and mass percent.

Compare two elements, find electronegativity difference, or calculate Mulliken electronegativity with clear scale notes.

Find full and noble-gas electron configurations by element name, symbol or atomic number. Add an optional charge for a clearly explained classroom ion

Calculate Slater-rule effective nuclear charge, shielding constant, and shielding steps for a selected occupied subshell.

Convert simple inorganic formulas and names with rule-based feedback for ionic, covalent, and acid compounds.

Calculate bond order from MO electron counts or equivalent resonance bonds, with the formula and your substituted values shown.