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August 28, 2015

Homework Help: Chemistry

Posted by Amy~ on Friday, August 27, 2010 at 3:21pm.

Lysine, an essential amino acid in the human body, contains C,H,O, and N. In one experiment, the complete combustion of 2.175g of lysine gave 3.94g CO2 and 1.89g H2O. In a separate experiment, 1.873 g of lysine gave 0.436 g NH3.

(a) Calculate the empirical formula of lysine

(b) The approximate molar mass of lysine is 150g. What is the moleclar formula of the compound?

For (a) I think I found the # of each element except H.

For element C would this be right:
3.94g CO2 / 12 g C = 0.328 C

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