Chapter 4, Problem 7MCP

(a)

Interpretation Introduction

Interpretation:

The number of molecules that are found in $1.0\text{ lb}$ of sucrose has to be calculated.

Concept Introduction:

Steps to find number of molecules from mass:

  $\left(\text{Gram}\right)\underset{\text{g}\times \frac{\text{1 mol}}{\text{g}}=\text{mol}}{\overset{\text{Divide by molar mass}}{\to }}\left(\text{moles}\right)\underset{\text{mol}\times \frac{6.022\times {10}^{23}\text{ particles}}{\text{1 mol}}=\text{particles}}{\overset{\text{multiply by Avogadro's number }}{\to }}\left(\begin{array}{l}\text{Particles (or)}\\ \text{molecules}\end{array}\right)$

(b)

Interpretation Introduction

Interpretation:

The number of molecules that are found in $\text{1}\text{.57 kg}$ of ${\text{N}}_{\text{2}}\text{O}$ has to be calculated.

Concept Introduction:

Refer part (a)

(c)

Interpretation Introduction

Interpretation:

The number of molecules that are found in $4\times {10}^5\text{ tons}$ of ${\text{SO}}_{\text{2}}$ has to be calculated.

Concept Introduction:

Refer part (a)

(d)

Interpretation Introduction

Interpretation:

The number of molecules that are found in $25.0\text{ lb}$ of ${\text{SiO}}_{\text{2}}$  has to be calculated.

Concept Introduction:

Refer part (a)