* Use the periodic table How many grams of O2 are in a 5.0 mol of the element?

80 g
16 g
160 g

160. you use a mole over grams ratio. 5.0x32mass of O2)

160 maybe is the correct answer

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