Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume) mixture of gas that had a total volume of 22.4 liters at STP. This gas sample is composed of
A) 1 mole of nitrogen and 1 mole of oxygen.
B) 0.5 mole of nitrogen and 0.5 mole of oxygen.
C) 50 mole of nitrogen and 50 mole of oxygen.
D) 28 mole of nitrogen and 32 mole of oxygen.
E) none of the above
Answer: B