Equation balancing, molar mass, electron configuration, solutions and kinematics, with step-by-step solutions for studying.
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Equation balancing, molar mass, percent composition and electron configuration.
Kinematics with uniform motion, acceleration, free fall and projectiles, solved step by step.
These tools solve the exercises that show up most in high school chemistry and physics and show the path to the answer: the balanced equation with its coefficients and an atom-by-atom check, the molar mass adding each element, the electron configuration in Madelung order, the concentration of a solution and the equations of motion with units converted.
The underlying data comes from primary sources: IUPAC atomic weights (CIAAW), CODATA physical constants published by NIST and SI units as defined by the BIPM. Everything is computed in your browser.
Each result comes with the steps a teacher expects on an exam: the equation set up, the values substituted with units, the intermediate arithmetic and the final check. The most common typing mistakes, such as a lowercase letter in the wrong place or mixed units, are pointed out with a clear message.
From the standard atomic weights published by the IUPAC Commission on Isotopic Abundances and Atomic Weights (CIAAW). For elements given as an interval, we use the recommended conventional value for education and trade.