How many liters of chlorine gas can be produced when 1.08 l of hcl react with excess o2 at stp?

Write out full equation and balance:
4HCL + O2 = 2H2O + 2Cl2
All gasses of the same mole will take up the same amount of space. No need to convert to moles.
Look at ratio of HCL to Cl2
4:2 which is 2:1 so HCl will produce half volume of Cl2
1.08 divide 2 = 0.54L

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