STEM PRACTICE AND EVIDENCE WORKBENCH
Convert grouped elemental masses to mole ratios, infer bounded whole-number subscripts, and audit learner formulas.
Review output
Load the worked example to inspect realistic inputs, or enter anonymous classroom or laboratory evidence. Results remain in this browser tab until you copy or download them.
Transparent method
Divide each elemental mass by its molar mass, divide every mole amount by the smallest, and multiply ratios by the first integer from one through twelve that places every value near a whole number. Reduce subscripts by their greatest common divisor. Supported means the repeated learner formula matches the inferred reduced ratio. Inspect raw moles, normalized ratios, chosen multiplier, uncertainty, composition totals, contamination, and chemical plausibility before accepting a formula.
Confirm the question, source, units, notation, response coding, model assumptions, and review threshold. Keep an unchanged copy of the original evidence.
Run the worked example, inspect every intermediate row, and compare it with a hand calculation, diagram, representation, or approved subject method.
Record the method, assumptions, units, classifications, and flagged rows. Verify the editable report independently before educational or laboratory use.
How to interpret the result
Use after composition evidence has been produced or supplied. The workbench exposes mass-to-mole and ratio steps. It does not identify elements, infer molar masses, repair noisy data, account for hydrates automatically, or prove chemical identity.
A water-like sample produces hydrogen-to-oxygen mole ratio two to one. An iron oxide sample produces two to three. A review sample has carbon-to-hydrogen ratio one to four, so learner formula CH is flagged against CH4.
Divide each elemental mass by its molar mass, divide every mole amount by the smallest, and multiply ratios by the first integer from one through twelve that places every value near a whole number. Reduce subscripts by their greatest common divisor.
Supported means the repeated learner formula matches the inferred reduced ratio. Inspect raw moles, normalized ratios, chosen multiplier, uncertainty, composition totals, contamination, and chemical plausibility before accepting a formula.
Do not use mass ratios directly as subscripts, round mole values too early, divide by the largest value, leave a reducible ratio, omit an element, or force noisy evidence into large subscripts. Retain guard digits and verify composition.
Learning boundary
This browser-local workbench applies only the disclosed rules. It cannot diagnose a learner, certify an experiment, or replace teacher, laboratory, and safety judgment.
Review checklist
Practical questions
No. Processing occurs in the current browser tab. Avoid personal information and retain authoritative records only in the approved school system.
No. It describes entered evidence under one disclosed rule. Review reasoning, uncertainty, access, and several evidence sources.
Treat it as an editable calculation aid. Show your own reasoning, cite required sources, and follow course and academic-integrity rules.
YOUR NIRMION
