Chemistry
Chemistry tools for high school and advanced middle school
Every atomic mass comes from cited sources (NIST/IUPAC, retrieved 2026-10-05), cross-checked between three independent databases. Every answer is computed by code from two independent methods — no AI is used, so these tools never use a generation credit and the answer keys are never wrong.
Balance It
Balancing chemical equations with code-computed atom tallies
Practice sheets of unbalanced equations with answer keys showing balanced equations, atom tallies, and the algebra method. Every coefficient computed by exact rational arithmetic.
Open toolMole Math
Mole conversions, stoichiometry, and gas laws with full work shown
Problem sets with answer keys showing complete dimensional analysis, units cancelling, and correct significant figures. Every answer computed by two independent methods.
Open toolPeriodic Table Reference
A printable table from verified NIST/IUPAC data
A printable periodic table generated from stored, sourced data. Choose what to show in each cell, coloring, and a blank version for students.
Open toolComing soon
Naming and Formulas
Practice naming compounds and writing formulas.
Request this toolGas Laws Lab
Boyle, Charles, and combined gas law practice.
Request this toolAcids and Bases
pH, titrations, and neutralization practice.
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How these tools were checked
- • Atomic masses: IUPAC conventional values as published by NIST, cross-checked with PubChem and CIAAW. Retrieved 2026-10-05.
- • Every answer computed by two independent methods and compared.
- • No AI used in generation or checking — these tools never use a generation credit.
- • Reactions from a curated textbook list, each verified to balance uniquely.