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How to compute percent composition in Python using UliEngineering

You can easily compute the percentage composition of elements in a compound using the UliEngineering Python library:

percent_composition.py
from UliEngineering.Chemistry.Stoichiometry import percent_composition

# Compute percent composition of water (H2O)
composition = percent_composition("H2O")
print(f"Water composition: {composition}")

# Compute percent composition of carbon dioxide (CO2)
composition = percent_composition("CO2")
print(f"CO2 composition: {composition}")

# Compute percent composition of sodium chloride (NaCl)
composition = percent_composition("NaCl")
print(f"NaCl composition: {composition}")

Example output

percent_composition_output.txt
Water composition: {'H': 11.19, 'O': 88.81}
CO2 composition: {'C': 27.29, 'O': 72.71}
NaCl composition: {'Na': 39.34, 'Cl': 60.66}

The percent composition calculation determines the mass percentage of each element in a chemical compound. This is essential for stoichiometry calculations, analytical chemistry, material science, and quality control in chemical manufacturing. It shows what fraction of the total mass of a compound is contributed by each constituent element.

The percent composition for each element is computed using the formula: $%{element} = \frac{n \times M{element}}{M_{compound}} \times 100$, where $n$ is the number of atoms of the element in the compound, $M_{element}$ is the atomic mass of the element, and $M_{compound}$ is the total molecular mass of the compound. The sum of all percentages equals 100%.

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