Fill in the blanks with the correct words.A ______ refers to a natural gas with more than 5% heavy hydrocarbon moleculesand less than 95% methane. One of the well-known impurities in natural gasthat is toxic, corrosive, and flammable is _______, which makes the gas _______.One of the most important natural gas processing steps is called ________, whichchanges _________ to a dry gas.