Chapter 3, Problem 153AP

Interpretation Introduction

Interpretation:

The molar mass of hemoglobin and mass of hemoglobin present inan adult is to be calculated with given molecular formula.

Concept introduction:

Molar mass is calculated by adding masses of each element multiplied by the number of their atoms present (given in subscript). Its S.I. unit is $\text{g}/\text{mol}$.

Atomic mass of elements is measured in terms of atomic mass unit. One atomic mass unit is defined as the number of elementary particles present in $12.0\text{g}$ of carbon atoms.

The number of moles are given by the following expression:

$n=\frac{\text{given mass}\left(m\right)}{\text{molar mass}\left(M\right)}$

One mole of a substance contains Avogadro number of particles, that is, $6.022\times {10}^{23}$ particles.

The mass of one mole of a substance is also equal to its molar mass.

The mass of hemoglobin can be calculated as

$\text{Mass of Hb =}\frac{\text{molar}\text{mass}\text{of}\text{Hb}}{\text{6}{\text{.022×10}}^{\text{23}}\text{Hb}}\text{×}\text{number}\text{of}\text{Hb}\text{molecules}$