Chapter 3, Problem 9PE

(a)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ has to be given.

Explanation of Solution

The name of the compound ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ is iron (III) oxide.

The number of iron atoms in ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ is $\text{2}\text{.}$

The number of oxygen atoms in ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ is $\text{3}\text{.}$

(b)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ has to be given.

Explanation of Solution

The name of the compound $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ is calcium nitrate.

The number of calcium atoms in $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ is $\text{1}\text{.}$

The number of nitrogen atoms in $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ is $\text{2}\text{.}$

The number of oxygen atoms in $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}$ is $\text{6}\text{.}$

(c)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of $\text{Co}{\left({\text{C}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}\right)}_{\text{2}}$ has to be given.

Explanation of Solution

The name of the compound $\text{Co}{\left({\text{C}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}\right)}_{\text{2}}$ is cobalt (II) acetate.

The number of cobalt atoms in $\text{Co}{\left({\text{C}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}\right)}_{\text{2}}$ is $\text{1}\text{.}$

The number of carbon atoms in $\text{Co}{\left({\text{C}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}\right)}_{\text{2}}$ is $\text{4}\text{.}$

The number of hydrogen atoms in $\text{Co}{\left({\text{C}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}\right)}_{\text{2}}$ is $\text{6}\text{.}$

The number of oxygen atoms in $\text{Co}{\left({\text{C}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}\right)}_{\text{2}}$ is $\text{4}\text{.}$

(d)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of ${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{3}}$ has to be given.

Explanation of Solution

The name of the compound ${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{3}}$ is acetone.

The number of carbon atoms in ${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{3}}$ is $\text{3}\text{.}$

The number of hydrogen atoms in ${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{3}}$ is $\text{6}\text{.}$

The number of oxygen atoms in ${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{3}}$ is $1.$

(e)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of ${\text{K}}_{\text{2}}{\text{CO}}_{\text{3}}$ has to be given.

Explanation of Solution

The name of the compound ${\text{K}}_{\text{2}}{\text{CO}}_{\text{3}}$ is potassium carbonate.

The number of potassium atoms in ${\text{K}}_{\text{2}}{\text{CO}}_{\text{3}}$ is $\text{2}\text{.}$

The number of carbon atoms in ${\text{K}}_{\text{2}}{\text{CO}}_{\text{3}}$ is $\text{1}\text{.}$

The number of oxygen atoms in ${\text{K}}_{\text{2}}{\text{CO}}_{\text{3}}$ is $\text{3}\text{.}$

(f)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of ${\text{Cu}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}$ has to be given.

Explanation of Solution

The name of the compound ${\text{Cu}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}$ is copper (II) phosphate.

The number of copper atoms in ${\text{Cu}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}$ is $\text{3}\text{.}$

The number of phosphorus atoms in ${\text{Cu}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}$ is $\text{2}\text{.}$

The number of oxygen atoms in ${\text{Cu}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}$ is $\text{8}\text{.}$

(g)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of ${\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}$ has to be given.

Explanation of Solution

The name of the compound ${\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}$ is ethanol.

The number of carbon atoms in ${\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}$ is $\text{2}\text{.}$

The number of hydrogen atoms in ${\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}$ is $\text{6}\text{.}$

The number of oxygen atoms in ${\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}$ is $1.$

(h)

Interpretation Introduction

Interpretation:

The name and number of atoms present in each element of ${\text{Na}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$ has to be given.

Explanation of Solution

The name of the compound ${\text{Na}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$ is sodium chromate.

The number of sodium atoms in ${\text{Na}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$ is $\text{2}\text{.}$

The number of chromium atoms in ${\text{Na}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$ is $\text{2}\text{.}$

The number of oxygen atoms in ${\text{Na}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$ is $\text{7}\text{.}$