The analysis f a biomas sample gave Element % Dry Weight of Cell C 50.2 O 20.1 N

Question

The analysis f a biomas sample gave

Element                                    % Dry Weight of Cell

C                                                   50.2

O                                                    20.1

N                                                    14.0

H                                                     8.2

P                                                     3.0

Other                                               4.5

This compod gives a ratio of 10.5 g cells/mol ATP synthesized in the metabolic reaction to form the cells. Approximately how many moles of C are in the cells per mole of ATP?

Explanation / Answer

mass of Carbon = 50.2% ( 10.5 g cells/mol )

                               = ( 0.502 ) ( 10.5 g cells/mol ) = 5.271 g

Thus, the no. of moles of Carbon = 5.271 g / atomic mass of carbon

                                                 = 5.271 g / 12 g

                                                  =0.43925

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