From the list of compounds below identify each of their molecules:
1. Propanone C3H60 Mr=58
2. Chromium trioxide Cr2O3 Mr= 152
3.Rubidium Carbonate Rb2CO3 Mr=231
4.Neon Ne: Mr= 20.2
5. Nitrophenol C6H5NO3 Mr= 139
6. Dinitrogentetraoxide N2O4 Mr=92
Please help I am really confused, please give clear and detailled step by step answers explaining whatever you do.