Explain how to convert a mass of compound A to a mass of compound D in words using the following reaction: 2A + 4B = C + 3D

You don't have to just give me the answer but if you can help me understand id appreciate it greatly

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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.