Prof. Marie Curie
Chemistry Expert
Professor Curie is a renowned chemist specializing in analytical and organic chemistry.
Calculators by Prof. Marie Curie
Mole Calculator
Calculate number of moles from mass and molar mass.
Molarity Calculator
Calculate molarity (concentration) of solutions.
Molality Calculator
Calculate molality (moles per kg solvent).
Stoichiometry Calculator
Calculate reactant and product amounts in chemical reactions.
Percent Composition Calculator
Calculate percent composition by mass of elements in compounds.
Empirical Formula Calculator
Calculate empirical formula from percent composition.
Molecular Formula Calculator
Calculate the molecular formula from an empirical formula and molecular mass. Enter an empirical formula (e.g., CH2O) and the molecular mass in g/mol to determine the molecular formula and element breakdown.
Solution Concentration Calculator
Calculate solution concentration in various units (M, g/L, % w/v, ppm) from solute mass, solution volume, and molar mass.
Dilution Calculator (Chemistry)
Calculate dilution volumes for solutions using the dilution equation C1V1 = C2V2.
pH & pOH Calculator
Calculate pH and pOH of aqueous solutions from hydrogen ion concentration (H+). Assumes Kw = 1e-14 at 25°C.
Buffer pH Calculator
Calculate buffer pH using Henderson-Hasselbalch equation for solutions. Input pKa and concentrations of conjugate base [A-] and weak acid [HA] to compute pH or pOH.
Titration Calculator
Calculate titration volumes and equivalence points for monoprotic acid-base titrations.
Enthalpy Calculator
Calculate enthalpy change in chemical reactions. Enter total heat (J) and moles to get ΔH in J/mol or kJ/mol.
Entropy Calculator
Calculate entropy change.
Gibbs Free Energy Calculator
Calculate Gibbs free energy using ΔG = ΔH - TΔS with enthalpy (kJ/mol), entropy (J/mol·K), and temperature (K).
Reaction Rate Calculator
Calculate reaction rates and rate constants.
Equilibrium Constant Calculator
Calculate equilibrium constant (K) for reactions.
Bond Energy Calculator
Calculate bond energy totals and reaction enthalpy (ΔH) from lists of bonds broken and formed. Enter bond energies as comma-separated values (kJ/mol).