Chemistry
Molar mass, molarity, gas laws, pH, buffers, kinetics and electrochemistry with exact constants.
M = Σ ni · Ar,iMolar Mass CalculatorΣ νi · aij = 0Chemical Equation Balancern = m/MGrams to Moles Calculatorc = m/(M · V)Molarity Calculatorb = msolute/(M · msolvent)Molality CalculatorC1 · V1 = C2 · V2Dilution Calculator (C1V1 = C2V2)P · V = n · R · TIdeal Gas Law Calculator(P1 · V1)/T1 = (P2 · V2)/T2Combined Gas Law Calculator(P + an²/V²)(V − n·b) = n · R · TVan der Waals Equation CalculatorpH = −log10[H3O+]pH CalculatorpH = pKa + log10 ([A−])/[HA]Buffer pH Calculator (Henderson–Hasselbalch)η = mactual/mtheoretical · 100 %Percent Yield Calculatork = A · e−Ea/(R·T)Arrhenius Equation CalculatorE = E° − (R · T)/(z · F) · ln QNernst Equation CalculatorΔG = ΔH − T · ΔSGibbs Free Energy CalculatorA = ε · l · cBeer–Lambert Law Calculatorw = msolute/msolution × 100Mass Percent Calculator (% w/w)[H⁺] = (−Ka + √(Ka² + 4KaC))/2Weak Acid pH Calculator (Ka)Ca · Va · ν = Ct · VtTitration Calculator (Unknown Concentration)Π = i · C · R · TOsmotic Pressure CalculatorΔTb = i · Kb · bBoiling Point Elevation CalculatorΔTf = i · Kf · bFreezing Point Depression Calculator[A] = [A]0 · e−ktFirst-Order Reaction Calculator (Rate Constant, Half-Life)r1/r2 = √M2/M1Graham's Law Calculator (Effusion Rate)ρ = (p · M)/(R · T)Gas Density Calculator (Ideal Gas)C 40 % · H 6.71 % · O 53.29 % → CH2OEmpirical Formula Calculator (from % Composition)