Chapter 8, Problem 125A

Interpretation Introduction

(a)

Interpretation:

The name of molecule having chemical formula ${\text{PCl}}_{\text{3}}$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the number of the subscript tells the type and the number of each atom in a molecule.

Answer to Problem 125A

The name of the molecule having chemical formula ${\text{PCl}}_{\text{3}}$ is phosphorous trichloride.

Explanation of Solution

The given chemical formula is ${\text{PCl}}_{\text{3}}$. In ${\text{PCl}}_{\text{3}}$, there are three chlorine atoms and one phosphorous atom. Therefore, the suffix “tri” will be added to the “chloride”. Therefore, the name of the molecule having a chemical formula, ${\text{PCl}}_{\text{3}}$, is phosphorous trichloride.

Interpretation Introduction

(b)

Interpretation:

The name of the molecule having chemical formula ${\text{Cl}}_{\text{2}}{\text{O}}_7$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the number of the subscript tells the type and the number of each atom in a molecule.

Answer to Problem 125A

The name of the molecule having chemical formula ${\text{Cl}}_{\text{2}}{\text{O}}_7$ is dichlorine heptoxide.

Explanation of Solution

The given chemical formula is ${\text{Cl}}_{\text{2}}{\text{O}}_7$. In ${\text{Cl}}_{\text{2}}{\text{O}}_7$, there are two chlorine atoms and seven oxygen atoms. Therefore, suffix “di” will be added to the “chlorine” and suffix “hept” will be added to the “oxide”. Therefore, the name of the molecule having a chemical formula, ${\text{Cl}}_{\text{2}}{\text{O}}_7$, is dichlorine heptoxide.

Interpretation Introduction

(c)

Interpretation:

The name of molecule having chemical formula ${\text{P}}_{\text{4}}{\text{O}}_6$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the number of the subscript tells the type and the number of each atom in a molecule.

Answer to Problem 125A

The name of the molecule having chemical formula ${\text{P}}_{\text{4}}{\text{O}}_6$ is tetraphosphorous hexoxide.

Explanation of Solution

The given chemical formula is ${\text{P}}_{\text{4}}{\text{O}}_6$. In ${\text{P}}_{\text{4}}{\text{O}}_6$, there are four phosphorous atoms and six oxygen atoms. Therefore, the suffix “tetra” will be added to the “phosphorous” and the suffix “hex” will be added to the “oxide”. Therefore, the name of the molecule having a chemical formula, ${\text{P}}_{\text{4}}{\text{O}}_6$, is tetraphosphorous hexoxide.

Interpretation Introduction

(d)

Interpretation:

The name of the molecule having chemical formula $\text{NO}$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the number of the subscript tells the type and the number of each atom in a molecule.

Answer to Problem 125A

The name of the molecule having chemical formula $\text{NO}$ is nitrogen monoxide.

Explanation of Solution

The given chemical formula is $\text{NO}$. In $\text{NO}$, there are one nitrogen atom and one oxygen atom. Therefore, the suffix “mono” will be added to the “oxide”. Therefore, the name of the molecule having a chemical formula, $\text{NO}$, is nitrogen monoxide.