3Ba(s)+N2 (g)--> BaN2(s) How many moles of barium metal react to produce 0.270 mol of barium nitride?
Express your answer with the appropriate units.

0.81 mol

Explanation:

Since the mole ratio of Ba : BaN2 = 3 : 1 (which can be seen from the balanced equation)

Therefore, 3 moles of Barium metal will produce 1 mole of BaN2.

With this ratio, let the no. of moles of barium metal be x.

i think it is d. e because the next one is igneous.