Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Sample mass (g)

Original sample mass analyzed.

Carbon mass (g)

Carbon mass found from CO₂.

Hydrogen mass (g)

Hydrogen mass found from H₂O.

Compute oxygen in the original sample as the remainder after subtracting carbon and hydrogen masses. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Oxygen mass (g)

Oxygen mass attributable to the original sample.

• Stoichiometric results assume the balanced reaction, stated purity, and complete conversion to the selected products. Yield, selectivity, side reactions, moisture, and measurement uncertainty must be handled separately.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Percent Carbon From Combustion Calculator

  Express the carbon recovered from combustion CO₂ as a percentage of the original sample mass.

• Combustion Carbon Mass Calculator

  Compute the carbon contained in a burned sample from the CO₂ collected during combustion analysis.

• Combustion Hydrogen Mass Calculator

  Compute the hydrogen contained in a burned sample from the H₂O collected during combustion analysis.