An 79.4 kg person puts on a life jacket, jumps into the water, and floats. the jacket has a volume of 0.03 m3 and is completely submerged under the water. the volume of the person’s body that is under water is 0.064 m3. what is the density of the life jacket? (water density = 1000 kg/m3)

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