Science

vchem

Parses chemical formulas and works out molar mass and gas law arithmetic.

Released v1.0.0 · 2026-09-28

Import

use "stdlib/chem.ven"

Chemical formulas, molar mass, gas laws and pH, in a handful of exact functions.

vchem.ven

print parse_formula("CaCO3")
:: {"Ca": 1, "C": 1, "O": 3}

Reference (6 functions)

API reference

Parses a flat chemical formula into pairs of element symbol and count.

parse_formula("CaCO3")
:: {"Ca": 1, "C": 1, "O": 3}

Computes the molar mass of formula in grams per mole.

molar_mass("H2O")
:: 18.015

Converts an amount in moles of formula to a mass in grams.

moles_to_grams(2.0, "H2O")
:: 36.03

Converts a mass in grams of formula to an amount in moles.

grams_to_moles(36.03, "H2O")
:: 2.0

Computes gas pressure from the ideal gas law, PV = nRT.

ideal_gas_pressure(1.0, 273.15, 22.4)
:: 1.0006228345982142

Computes pH from a hydrogen ion concentration.

ph_from_concentration(0.0000001)
:: 7.0