Nicotine is 74.1% carbon, 8.6% hydrogen, and 17.3% nitrogen by mass. what is its molecular formula if its molar mass is 162.26 g/mol

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.