Magnesium and nitrogen react in a combination reaction to produce magnesium nitride. 3 mg + n2 ? mg3n2. in a particular experiment, a 9.27 g sample of n2 reacts completely. the mass of mg consumed is

3Mg + N₂ = Mg₃N₂

m(Mg)=3M(Mg)m(N₂)/M(N₂)

m(Mg)=3*24.3*9.27/28.0=24.14 g

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