Lab Report: determine the molar mass of an unknown gas, from the gas density

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…included in it. We apparently have got some of the "cheap" propane. If we assume that natural gas is the other component, we can then determine how much really is propane and how much is natural gas. By doing a proportional calculation. We determined that 36% of the propane was actually methane, and 64% was really propane. To calculate this we needed to use the molar mass of propane as well as methane to do the conversion.