Which of the following set of compounds have the same molecular formula? a) Butane and isobutane b) Cyclohexane and 1-hexene c) Propanal and propanone d) All the three Share with your friends Share 11 Soumya answered this a) butane and isobutane -4 View Full Answer Anjali answered this a) isobutane n butane -1 Mahir answered this Butane and isobutane has the same molecular formula since isobutane is an isomer (has same formula) of butane. 3 Shreya answered this Option A) -2