Given that 4 NH3 + 5 O2 ? 4 NO + 6 H2O, when 4.50 mol of H2O are formed, the amount of NO formed is:
A) 1.50 mol.
B) 3.00 mol.
C) 4.50 mol.
D) 6.75 mol.
E) none of the above
Answer: B
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