Chemical analysis of an unknown compound shows that it contains 64.9%C, 13.5%H, and 21.6% O by mass. At 120 oC and 750 mmHg, 2.00 L of the gaseous compound weighs 4.60 g.  a.) What is the empirical formula of the compound? b.) What is the molar mass of the compound?  c.) What is the molecular formula of the compound?

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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.