When butane burns in oxygen, it produces carbon dioxide and water. this reaction is represented in this equation: 2c4h10 + 13o2 → 8co2 + 10h2o this equation is balanced because there are atoms of carbon (c), atoms of oxygen (o), and atoms of hydrogen (h) on each side of the equation.

This equation is balanced because there are 8 atoms of carbon (C), 26 atoms of oxygen (O), and 20 atoms of hydrogen (H) on each side of the equation.

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

Sorry i dont understand the question can you rephase it?