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H x c. C-ch4-x-c2h6. Ch4 c2h4 c2h6 co2. Ch4 x1 c2h6. Ch4 1500c x1 c2h6.
C-ch4-x-c2h6. Ch4 c2h4 c2h6 co2. Ch4 x1 c2h6. Ch4 1500c x1 c2h6.