A sample of 51.0 g of ammonia was reacted with excess copper oxide. How many moles of nitrogen would be produced? 2NH₃ (g) + 3CuO (s) → 3Cu (s) + 3H₂O (l) + N₂ (g)

A.

1.0 mole

B.

1.5 mole

C.

2.0 mole

D.

2.5 mole

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