Question

Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms. If cytochrome c is $0.43\%$ $Fe$ (atomic mass = 56 amu) by weight, then the minimum molecular weight(Kg mol${}^{-1}$)is $6.5X$. Then $X$ is:

Answer 1

Let the molar mass be $=M$.
If $0.43\%$ $Fe$ has molar mass$=100g$.
Then, $56$ g $Fe$ has molar mass$=\frac{100\times 56}{0.43}=13023.26=13Kg$ $mo{l}^{-1}$.

Hence $X$= $2$.