A gaseous hydrogen and carbon-containing compound is decomposed and found to contain 82.66%% carbon and 17.34%% hydrogen by mass. The mass of 158 mLmL of the gas, measured at 556 TorrTorr and 25 ∘C∘C, was 0.275 gg.     What is the molecular formula of the compound? Express your answer as a chemical formula.

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.