What mass of Cl2 can be produced at STP when 3.3 moles of HCl are reacted with excess MnO2?

C12 is to 642 and stop will be a28 so 642+a28=1879ab

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