Ethane reacts with oxygen according to the balanced equation below.
2 C₂H₆(g) + 7 O₂(g) → 4 CO₂(g) + 6 H₂O(l)
A mixture of ethane and oxygen occupies 22.4 L at STP. The mixture is allowed to react as described above, and the gases then occupy 11.2 L at STP. How many moles of ethane were originally present?

Question

Ethane reacts with oxygen according to the balanced  equation below.
2 C2H6(g) + 7 O2(g) → 4 CO2(g) + 6 H2O(l)
A mixture of ethane  and oxygen occupies 22.4 L at STP. The mixture is allowed to react as described  above, and the gases then occupy 11.2 L at STP. How many moles of ethane were  originally present?

Accepted Answer

Correct answer: D.

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