Chapter 3, Problem 3.1QP

Interpretation Introduction

Interpretation:

An atomic mass unit and its necessary to introduce such a unit have to be explained.

Explanation of Solution

Atomic mass unit is defined as a mass exactly equal to one-twelfth the mass of one carbon-12 atom.  It is the standard for measuring the atomic mass of the other elements.  Simply, it can be represented as $\text{amu}$.

The $\text{amu}$ to establish the value of Avogadro's number the number of particles in one mole.  One $\text{amu}$ is currently defined as one $\text{12th}$ the mass of one atom of $\text{C-12*}$ By definition the number of $\text{amu}$ that equals exactly one gram is Avogadro's number.