How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g)?
Given CH4 (g) + 2O2 (g) ? CO2 (g) + H2O (g)A) 28.0 L
B) 56.0 L
C) 84.0 L
D) 112. L
E) none of the above
Answer: D
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