Public evidence

chemistry.mole.amount

Machine-checked verification for calculation version 1.0.0 · tier engine_tested

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Verification

12/12 calculation tests · Production surface contract 3/3

Golden tests 1 / 1
Boundary tests 6 / 6
Property tests 5 / 5
Production surface contract 3 / 3
Engine tested Yes
Source checked Yes
Artifact integrity PASS
Production attestation Embedded snapshot: unpublished · Build schema 1.0.0 ready · Semantic contract ✓ · Attestation report not published on origin · Live production status PASS (0 stale; 164 CURRENT) @ 2026-09-16T06:44:24.909Z
Semantic contract PASS
Evidence attested at 2026-09-16T06:44:24.203Z
Last production check 2026-09-16T06:44:24.203Z
Public / cache —
Origin —
Supplemental domain review Not performed
Named expert review Not performed

release artifacts aligned PASS
schema valid input executes PASS
engine success output validates schema PASS

Fingerprint sha256:918c2cd3d6d266c310adc012f344657de4fdd9694b530d52df415bcb5c7c9f7d

Input schema sha256:446cb7098c493ddb19c213a7e8351cb097c88380d70fb82df400f723f3fee47a · Output schema sha256:11fcce728bbcce0364c2ba921aa449c52d35083022aadbadb7572a6f0be7a129 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: mole
Engine: mole
Engine build: 2026-09-16
Evidence core: 2026-09-16T11:18:24.767Z
Rendered: 2026-09-16T11:29:50.772Z
Last reviewed: —

Assumptions

n = m/M
N = n·N_A
N_A = 6.02214076e23 (CODATA 2018 exact)
Lab units g, g/mol, mol
Not molarity or dilution
Not ICE or Henderson–Hasselbalch

Limitations

Lab units g, g/mol, mol
Not molarity c=n/V or dilution C1V1=C2V2
Not ICE or Henderson–Hasselbalch
Does not rewrite /convert/chemistry pair pages

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

CODATA 2018 — Avogadro constant — N_A
Supports: N_A = 6.02214076×10²³ mol⁻¹ exactly
IUPAC Gold Book — mole — amount of substance
Supports: The mole is the SI unit of amount of substance; n = N/N_A
OpenStax Chemistry 2e — Formula Mass and the Mole Concept — The mole
Supports: n = m/M relates mass, molar mass, and amount

Published checks

Golden, boundary, and property cases included in this evidence build.

ID	Kind	Status	Detail
`golden-mole`	golden	pass	Expected amount=2 · mass=36.03 · molar_mass=18.015 · model=mole · Actual mode=from_mass · amount=2 · mass=36.03 · molar_mass=18.015 · particles=1.204428152e+24 · N_A=6.02214076e+23 · model=mole
`boundary-mole-mass`	boundary	pass	Expected mass=36.03 · amount=2 · Actual mode=to_mass · amount=2 · mass=36.03 · molar_mass=18.015 · particles=1.204428152e+24 · N_A=6.02214076e+23 · model=mole
`boundary-mole-particles`	boundary	pass	Expected amount=1 · Actual mode=from_particles · amount=1 · particles=6.02214076e+23 · N_A=6.02214076e+23 · model=mole
`boundary-mole-zero`	boundary	pass	Expected amount=0 · particles=0 · Actual mode=from_mass · amount=0 · mass=0 · molar_mass=18.015 · particles=0 · N_A=6.02214076e+23 · model=mole
`boundary-mole-M`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`boundary-mole-missing`	boundary	pass	Expected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
`boundary-mole-mode`	boundary	pass	Expected INVALID_MODE · Actual INVALID_MODE
`property-mole-n`	property	pass	n=2
`property-mole-N`	property	pass	N/N_A=2
`property-mole-mass`	property	pass	m=nM
`property-mole-from-N`	property	pass	n=N/N_A
`property-mole-model`	property	pass	mole