Question

Hemoglobin contains 0.25% iron/weight the molecular mass of hemoglobin is 89600 calculate the no. Of iron atoms present in 1molecule of hemoglobin Atomic mass of iron is 56

Answer 1

Given,Hemoglobin contains 0.25% iron/weight
it means that,
100 gram of hemoglobin contains Fe = 0.25 gramSo,89600g Hb contains Fe =( 0.25/100 ) * 89600                                       = 224 gram Fehence,
1 mole  Hb contains 222gram Fe again,56 gram Fe  contains = 1 Fe atomSo,224 gram Fe contains = 224/56  = 4 atoms of FeAns. 4 atoms FeHope it helped you!!!!