Question

A compound with haemoglobin like struc-
ture contains one atom of iron per molecule.
If it contains 4.6% iron, its approximate molecular mass is
(a) 100 g mol-1
(b) 1200 g mol-1
(c) 1600 g mol-1
(d) 1400 g mol-1​

Answer 1

Answer:

1214.13g/mol

Explanation:

Number of atoms of iron in hemoglobin = 1

Mass of 1 iron atom = 55.85 g/mol

Percentage of iron in 1 hemoglobin molecule = 4.6 %

Molar mass of hemoglobin = x

4.6=\frac{55.85 g/mol}{x}\times 1004.6=

x

55.85g/mol

×100

x = 1,214.13 g/mol

The approximate molar mass of hemoglobin is 1,214.13 g/mol.