An unknown amount of chlorine gas fill a 2 L tank at 845 torr while at 27.55 oC. What will the pressure of the tank be (in atm) if the tank is heated to 44.93 oC?

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

The answer to your q the total mass is 73