What is the mass in grams of 7.0*10^20 molecules of aspirin (C9H8O4)

Rethink and reinvent

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

It is sure ( overimitation)