At 11°C temperature and 749 mm pressure, the weight of a gascous hydrocarbon is 0.11gm. If in that compound, there is 85.71% Carbon, then what is its molecular formula? (Volume =46.43 mL; molecular weight = 56).

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$\mathrm{C}_{4} \mathrm{H}_{8}$

$\mathrm{C}_{2} \mathrm{H}_{6}$