A mixture of C_2H_2 and C_3H_8 occupied a certain volume at 80 mm Hg. The mixture was completely burnt to CO_2

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Q 1230267112.     A mixture of C_2H_2 and C_3H_8 occupied a certain volume at 80 mm Hg. The mixture was completely burnt to CO_2 and H_2O(l). When the pressure of CO_2 was found to be 230 mm Hg at the same temprature and volume, the fraction of C_2H_2 in mixture is
A

0.125

B

0.5

C

0.85

D

0.25`

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