What mass of ethane gas (C₂ H₆ ) must burn in excess oxygen to produce 2.00 10 3 kJ of heat, given the thermochemical equation:
2 C₂ H₆(g) + 7 O₂(g) 4 CO₂ (g) + 6 H₂ O ( 
) D H = - 3.12 10 3 kJ
A) 0.641 g
B) 19.3 g
C) 38.6 g
D) heat is not produced by this reaction
E) none of these
Correct Answer:
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