Question

number of fe atoms in 100 g haemoglobin if it contains 0.33% fe

Answer 1

% of fe= 0.33  of molecular weigh of haemoglobin 
therefore .
weight of  fe present = (0.33/100)*67200
                                 = 221.76
atomic mass of fe = 56 
no.of approx.  atom present = 221.76/56 
                                             =3.96 (approx 4)
hence, here are 4 fe molecule in one haemoglobin molecule 

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