STEM PRACTICE AND EVIDENCE WORKBENCH
Group element-count evidence by reaction and expose every reactant-to-product mismatch behind a balance claim.
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
For each reaction, compare reactant and product integer totals for every unique element. Balanced is true only when all differences equal zero. One repeated claim is compared with that conjunction; no average can hide one unmatched element. Supported means the claim matches the supplied count table. The evidence is only complete if every actual element is represented and counts came from correct formulas and coefficients. Review charge separately for ionic equations.
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 coefficients have been proposed and atom totals counted. It audits supplied evidence rather than parsing equations. It does not determine coefficients, validate formulas or reaction feasibility, balance charge, or infer omitted elements.
Water and ammonia evidence have equal totals for every represented element. A fictional combustion claim has carbon and hydrogen equal but oxygen totals two and three, so the repeated balanced claim is flagged and the oxygen difference stays visible.
For each reaction, compare reactant and product integer totals for every unique element. Balanced is true only when all differences equal zero. One repeated claim is compared with that conjunction; no average can hide one unmatched element.
Supported means the claim matches the supplied count table. The evidence is only complete if every actual element is represented and counts came from correct formulas and coefficients. Review charge separately for ionic equations.
Do not change subscripts to balance, forget coefficients multiply every atom, cancel unequal atoms, omit oxygen or hydrogen, accept most elements matching, or treat count agreement as proof a reaction occurs. Recount systematically and reduce coefficients.
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
