Hemoglobin content. The average volume of a red blood cell is 87 ?m3. The mean concentration of hemoglobin in red cells is 0.34 g ml?1. ( so, i have the answer key..but how do you get to the answers is what my book does not show!! I am trying to study for an exam so i neeed to know how these are solved thx)

(a) What is the weight of the hemoglobin contained in a red cell?

(b) How many hemoglobin molecules are there in a red cell?

(c) Could the hemoglobin concentration in red cells be much higher than the observed value? (Hint: Suppose that a red cell contained a crystalline array of hemoglobin molecules in a cubic lattice with 65 Å sides.)