Question

Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200 g. The number of iron atom ( at. weight of Fe is 56) present in one molecule of haemoglobin are
(a) 1
(b) 6
(c) 4
(d) 2
Answer in step wise​

Answer 1

(c) 4

$\huge \huge\bold\color{blue}{\underbrace{\overbrace{\mathfrak{\color{red}{✍Answer⭐}}}}}$

Given:-

• Haemoglobin contains 0.33% of iron by weight.
• molecular weight of haemoglobin is approximately 67200 g.
• weight of Fe is 56

To find :-

• The number of iron atom present in one molecule of haemoglobin are= ?

Let:-

• number of iron atoms in one molecular of haemoglobin =x
• 0.33 g of Fe is present in haemoglobin = 100 g

56x g of Fe is present in haemoglobin are

$\\ \mathtt{ = \frac{100 \times 56x}{0.33} g}$

$\\ \mathtt{ \therefore \frac{100 \times 56x}{0.33} = 67200 }$

$\mathtt{ \implies{{100 \times 56x = 67200 \times 0.33}}}$

$\mathtt{ \implies100 \times 56x = 22176}$

$\\ \mathtt{ \implies56x = \frac{22176}{100} }$

$\mathtt{ \implies56x = 221.76}$

$\\ \mathtt{ \implies x = \frac{221.76}{56} }$

$\color{green}{\boxed {\mathtt{\implies x = 3.96 \boxed{ ≈4}}}}$

The number of iron atom present in one molecule of haemoglobin are 4.

Answer 2

Hii Army

Im Chandni

^_^

I had deleted my accounts a few times.... Ananya unnie... n Hansvi unnie know tht....

But I'm not sure if I know u

Im in grade 9

I think ur elder to me

So if u don't mind...

Can u be my oppa??

I Purple U