The Natural Gas Properties calculates thermodynamic and calorific properties of Natural Gas mixtures. Calculated Properties: Molar Weight. Specific Gravity. Compressibility Factor. Mass/Mole/Volumetric Lower/Higher Heating Values. Wobbe Index. Motor Octane Number (MON). Methane Number (MN). Hydrocarbon Dew Point @ P. Hydrocarbon Dew Point @ 1 atm. Water Dew Point @ P.