Question

Ge
The red colour of blood is due to a compound
called "haemoglobin. It contains 0.335 % of
iron. four atoms of iron are
present in one molecule of haemoglobin what
is the molecular weight?​

Answer 1

$\huge\fcolorbox{red}{pink}{Answer} \\ \\ \implies \rm \: \%Fe = \frac{n \times atomic \: weight \: of \: Fe \times 100}{molecular \: weight \: of \: haemoglobin} \\ \\ \implies \rm \: 0.335 = \frac{4 \times 56 \times 100}{Mw} \\ \\ \therefore \: \boxed{ \red{ \rm{Mw =66865.67 \: \frac{g}{mol} }}}$