What is the formula unit for a compound made from Fe2+ and oxygen? (3 points) OFe FeO Fe2O O2Fe

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Enzymes affect the reactions in living cells by changing the