A compound containing carbon, hydrogen and oxygen has been analyzed. It contains

Question

A compound containing carbon, hydrogen and oxygen has been analyzed. It contains 69.72% of carbon and 18.58% of oxygen. If the molecular weight of the compound is 86.13, what is its molecular formula?

NOTE: Write the compound in the form (CXHYOZ), where X, Y and Z are whole numbers

A compound containing carbon, hydrogen and oxygen has been analyzed. It contains 69.72% of carbon and 18.58% of oxygen. If the molecular weight of the compound is 86.13, what is its molecular formula?

NOTE: Write the compound in the form (CXHYOZ), where X, Y and Z are whole numbers

Explanation / Answer

Compound contains 69.72% of carbon and 18.58% of oxygen and hydrogen =11.7%.

Atomic mass of carbon = 12.0 g/mol; oxygen = 16.0g/mol; hydrogen = 1.0 g/mol.

So the ratio of carbon : oxygen : hydrogen = 5.81 : 1.16 : 11.7 = 5.0 : 1.0 : 10.0

So, the molecular formula = C5H10O. Its molecular weight of the compound is 86.13.

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