Brass is an alloy of copper and zinc. the two metals are melted, mixed, and then solidified. how would you best classify brass? a) homogeneous mixture b) heterogeneous mixture c) pure substance: mixture d) pure substance: compound

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