Empirical formula from percent or gram composition by element, and the molecular
Empirical formula from percent or gram composition by element, and the molecular formula if you give the molar mass.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
674 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://chemistry-calc.x402tookit.com/empirical-formula
| Category | Everything else |
|---|---|
| Provider host | chemistry-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 674 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"composition": "C:40.0,H:6.7,O:53.3"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"composition": {
"description": "element:percent (or grams) pairs, e.g. C:40.0,H:6.7,O:53.3",
"type": "string"
},
"molarMass": {
"description": "Known molar mass in g/mol to find the molecular formula",
"type": "number"
}
},
"required": [
"composition"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"empiricalFormula": {
"type": [
"null",
"string"
]
},
"empiricalMassGPerMol": {
"type": [
"null",
"number"
]
},
"inputSum": {
"type": [
"null",
"number"
]
},
"moleRatios": {
"properties": {
"C": {
"type": [
"null",
"number"
]
},
"H": {
"type": [
"null",
"number"
]
},
"O": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"molecularFormula": {},
"molecularMultiplier": {},
"multiplierUsed": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"subscripts": {
"properties": {
"C": {
"type": [
"null",
"number"
]
},
"H": {
"type": [
"null",
"number"
]
},
"O": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}