The molecular formulae of the given compounds are:

• Glycerol: $\rm (C_{3}H_{5})(OH)_{3}$
• Methane: $\rm CH_{4}$
• Ethanol: $\rm C_{2} H_{5} OH$
• Butane: $\rm C_{4}H_{10}$
• Propane: $\rm C_{3}H_{8}$
• Acetylene: $\rm C_{2}H_{2}$
• Ethene: $\rm C_{2}H_{4}$
• Ethane: $\rm C_{2}H_{6}$
• Propyne: $\rm C_{3}H_{4}$
• Methyl Alcohol: $\rm CH_{2} OH$