Chapter F, Problem C.21E

(a)

Interpretation Introduction

Interpretation:

Substance $\text{HCl}$ has to be identified as element, molecular compound, or ionic compound.

Concept Introduction:

Molecular compounds are electrically neutral.  They consist of neutral molecules.  Molecule contains a group of atoms that are bonded together in a specific way of arrangement.  Molecular compounds contain only nonmetals.

Ionic compounds are electrically neutral.  This is because there are equal numbers of opposite charges present in the ionic compounds.  Empirical formula gives a relative number of atoms of each type of element that is present in the compound to the smallest possible whole-number as subscript.  Ionic compound contains at least one metal atom.

Element contains only one type of atoms in it.  They have the same chemical and physical property for each and every atom in it.

(b)

Interpretation Introduction

Interpretation:

Substance ${\text{S}}_{\text{8}}$ has to be identified as element, molecular compound, or ionic compound.

Concept Introduction:

Refer part (a).

(c)

Interpretation Introduction

Interpretation:

Substance $\text{CoS}$ has to be identified as element, molecular compound, or ionic compound.

Concept Introduction:

Refer part (a).

(d)

Interpretation Introduction

Interpretation:

Substance $\text{Ar}$ has to be identified as element, molecular compound, or ionic compound.

Concept Introduction:

Refer part (a).

(e)

Interpretation Introduction

Interpretation:

Substance ${\text{CS}}_{\text{2}}$ has to be identified as element, molecular compound, or ionic compound.

Concept Introduction:

Refer part (a).

(f)

Interpretation Introduction

Interpretation:

Substance ${\text{SrBr}}_{\text{2}}$ has to be identified as element, molecular compound, or ionic compound.

Concept Introduction:

Refer part (a).