Constants library

Molar Mass of Water measured

M(\mathrm{H_2O}) = 0.018015\ \text{kg/mol}

kg/molThe molar mass of water, 18.015 g/mol — one mole of H₂O is 18.015 g and occupies almost exactly 18.07 mL of liquid at 25 °C.

M(\mathrm{CO_2}) = 0.044009\ \text{kg/mol}

kg/molThe molar mass of carbon dioxide, 44.009 g/mol — the conversion that turns tonnes of burnt carbon into tonnes of CO₂ emitted.

M(\mathrm{O_2}) = 0.031998\ \text{kg/mol}

kg/molThe molar mass of molecular oxygen, 31.998 g/mol — the basis of every stoichiometric air requirement in combustion calculations.

M(\mathrm{N_2}) = 0.028014\ \text{kg/mol}

kg/molThe molar mass of molecular nitrogen, 28.014 g/mol — the dominant term in the 28.96 g/mol average molar mass of dry air.

M(\mathrm{CH_4}) = 0.016043\ \text{kg/mol}

kg/molThe molar mass of methane, 16.043 g/mol — the working figure for natural gas, converting between cubic metres, kilograms and moles.

M(\mathrm{NaCl}) = 0.05844\ \text{kg/mol}

kg/molThe formula mass of sodium chloride, 58.44 g/mol — the number behind saline, brine strength and softener regeneration dosing.

M(\mathrm{CaCO_3}) = 0.100086\ \text{kg/mol}

kg/molThe formula mass of calcium carbonate, 100.086 g/mol — the reference substance for reporting hardness and alkalinity as mg/L as CaCO₃.

M(\mathrm{H_2SO_4}) = 0.098072\ \text{kg/mol}

kg/molThe molar mass of sulfuric acid, 98.072 g/mol — the basis for converting between percent strength, molarity and normality in acid feed.

M(\mathrm{NaOH}) = 0.039997\ \text{kg/mol}

kg/molThe formula mass of sodium hydroxide, 39.997 g/mol — the reason a 1 M caustic solution is made from almost exactly 40 g per litre.

M(\mathrm{NH_3}) = 0.017031\ \text{kg/mol}

kg/molThe molar mass of ammonia, 17.031 g/mol — the conversion between mg/L as N and mg/L as NH₃ in every wastewater report.

M(\mathrm{C_6H_{12}O_6}) = 0.180156\ \text{kg/mol}

kg/molThe molar mass of glucose, 180.156 g/mol — the conversion between blood sugar in mg/dL and mmol/L, and the unit of cellular energy accounting.