Ariver with a discharge of 10 m3/s carries a concentration of 10 ppb of benzene and discharges into a 5,000,000 m3 lake. at time zero, a plant begins discharging 1 m3/s with 20 ppb of benzene. what is the concentration of benzene leaving the lake 7 days after the plant begins discharging? the benzene decay coefficient for the lake is 0.001mg/l-day.

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