Can someone plz with questions 3 and 4 and if you can see question 5 then plz answer it . complete sentences. this is for masteries

Plz me get these answer dubble cheak ur answer plz ppl i need it right

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

If you are told to get 100 ml of stock solution to use to prepare smaller size sample for an experiment, which piece of glassware would you use?