1. An important function of Iron is to transport oxygen to various organs. All of adult human blood contains about 3.0 g of Iron. There are about 2.6 x 10¹³ red blood cells in all of the adult human blood.

a. How many moles of Iron are present in all of the adult human blood?
b. How many iron atoms are in each blood cell?

For this problem, I thought the method was to convert to moles for problem A.
So what I did was 3.0g Fe*1/55.85g=.0537 moles. I am guessing that is A
For B, converting to atoms, so taking 2.6*10^13*6.022810^23=1.565*10^37

Please tell me what I am doing wrong or right.

Another problem I am stuck on is:
2) On an alien planet, two different scales are used. Two quantities in both scales are given below:
23.3 zics = 1 zac 12.2 quarks² = 2.2 zircs
Convert 398.0 zircs/(zic)² to quarks/zac

What I did for this is:
398.0 zircs(zic)^2/1*(1zac/23.3 zics)*(12.28 quarks/2.2 zircs)=94.724zac/quarks.

Please let me know if I did this correctly.