Chapter 3, Problem 146AP

Interpretation Introduction

Interpretation:

The number of arsenic atoms and mass percent of mercury in BAL complex are to be calculated.

Concept introduction:

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:

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

The number of molecules in a mole is calculated by the following expression:

$\text{Number}\text{of}\text{molecules}=n\times N_A$

Here, $N_A$ represents the Avogadro’s number and $n$ is number of moles.

The mass percent of compound in the complex is calculated by the expression:

$\text{mass\%}\text{of}\text{compound}=n\times M\times 100$

Here, $n$ is number of moles and $M$

is molar mass of the compound.