Chapter 3.3, Problem 7PE

Interpretation Introduction

Interpretation:

From the given mass of isopropanol, number of hydrogen atoms in isopropanol has to be calculated.

Concept Introduction:

• Molar mass of a molecule can be calculated from its molecular formula by taking the sum of atomic masses of all the elements present in it.
• Conversion formula for mass of a molecule into number moles,

$Numberofmoles=\frac{Massingrams}{Molarmass}$

• Each mole contains Avogadro number of atoms. $\text{1}\text{mol}\text{=}\text{6}\text{.022}{\text{×10}}^{\text{23}}\text{atoms}$
• Number of atoms from given number of moles is calculated as,

  $\text{Atoms}\text{=}\frac{\text{6}\text{.022}{\text{×10}}^{\text{23}}\text{atoms}}{\text{1}\text{mol}}\text{×}\text{Number of}\text{moles}$