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Verified answer
CH4 + 2O2 ---->>> CO2 + 2H2Ox ...........................x
C4H10 + 13/2O2 ---->>> 4CO2 + 5H2O
5-x.................................20-4x
V CO2 = x + 20 - 4x
17 = 20 - 3x
3 = 3x
x = 1 L
V metana = 1 L
V butana = 4 L
jawaban C