Heat transfer by conduction occurs when
molecules
(1) flow as currents through liquids
(2) form waves that travel through space
(3) become less dense and rise

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound