4. In what cellular function does the structure shown here play a role? O A. They play a major role in protein synthesis.
O B. They act as the powerhouse for the cell.
O C. They are involved in the separation of chromosomes during cell division
O D. They are involved in photosynthesis.

Crust,mantle,core,earth

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

Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o