Answer:
The mass of magnesium that has been consumed, was 6.69 g
Explanation:
The reaction is this one:
3Mg (s) + N₂(g) → Mg₃N₂
3 moles of solid magnesium react with 1 mol of nitrogen, to make 1 mol of magnesium nitride.
If 9.27 grams of nitrogen react, we see that ratio is 1:1, so we make 9.27 grams of nitride.
Mass / Molar mass = Moles
9.27 g / 100.9 g/m = 0.092 moles
If we have 0.092 moles of nitride, ratio between Mg is 1:3 so, the rule of three will be:
1 mol of Nitride was produced by 3 moles of Mg (s)
0.092 moles of nitride were produced by, (0.092 .3)/1 = 0.275 moles
Mass og Mg = 24.3 g/m
Molar mass . Moles = Mass
0.275 m . 24.3g/m = 6.69 g
