Chapter 6, Problem 6.57SP

(a)

Interpretation Introduction

Interpretation:

The number of grams of sodium are present in the samples has to be calculated.

Concept introduction:

Number of moles:

One mole is the equal to number of atoms in $\text{12g}$ of carbon $\text{-12}$ which is equal to $\text{6}{\text{.023×10}}^{\text{23}}$ atoms. This is also known as Avogadro number.

The amount mass in grams can be calculated as:

The amount mass in grams = $\text{No of moles of element ×}\text{atomic}\text{mass}\text{of}\text{element}$

(b)

Interpretation Introduction

Interpretation:

The number of grams of lead are present in the samples has to be calculated.

Concept introduction:

Number of moles:

One mole is the equal to number of atoms in $\text{12g}$ of carbon $\text{-12}$ which is equal to $\text{6}{\text{.023×10}}^{\text{23}}$ atoms. This is also known as Avogadro number.

The amount mass in grams can be calculated as:

The amount mass in grams = $\text{No of moles of element ×}\text{atomic}\text{mass}\text{of}\text{element}$

(c)

Interpretation Introduction

Interpretation:

The number of grams of diazepam are present in the samples has to be calculated.

Concept introduction:

Number of moles:

One mole is the equal to number of atoms in $\text{12g}$ of carbon $\text{-12}$ which is equal to $\text{6}{\text{.023×10}}^{\text{23}}$ atoms. This is also known as Avogadro number.

The amount mass in grams can be calculated as:

The amount mass in grams = $\text{No of moles of element ×}\text{atomic}\text{mass}\text{of}\text{element}$