A metal tank contains three gases: oxygen, helium and nitrogen. If the partial pressures of the three gases in the tank are 15 atm of O2, 3 atm of N2 and 9 atm of He, what is the total pressure inside of the tank?

The answers is bad germs in their

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na