The analysis of an organic compound showed that it contains 0.175 mol C, 0.140 mol H, and 0.035 mol N. Its molecular is about 160 g/mol. What is the subscript on in the chemical formula?
We divide thru the molar quantities by the SMALLEST such molar quantity, that of nitrogen:
And thus we get an empirical formula of
But the molecular formula is always a whole number mulitple of the empirical formula:
And then solve for
By this calculation, the empirical mass is