Chapter 9, Problem 62A

Interpretation Introduction

(a)

Interpretation:

The formula for nitrogen dioxide gas and its physical state needs to be determined.

Concept introduction:

Gases are highly compressible as related to solids and liquids. The intermolecular forces of attraction between gas molecules are very low as related to solids and liquids.

Answer to Problem 62A

Nitrogen dioxide gas would be described by the formula ${\text{NO}}_{\text{2}}\left(g\right)$.

Explanation of Solution

Nitrogen dioxide gas is the consisting of nitrogen and oxygen molecule in gaseous state. It is a diatomic molecule. In a chemical equation nitrogen dioxide gas would be described by the formula ${\text{NO}}_{\text{2}}\left(g\right)$.

(b)

Interpretation Introduction

Interpretation:

The formula for liquid gallium and its physical state needs to be determined.

Concept introduction:

Liquid has no fixed shape but has fixed volume. Liquids can flow and changes their shape. Thus they are no rigid but liquids are called fluid.

Answer to Problem 62A

Liquid gallium would be described by the formula Ga (l).

Explanation of Solution

Liquid gallium is an element that is found in liquid state. In a chemical equation liquid gallium would be described by the formula Ga (l).

(c)

Interpretation Introduction

Interpretation:

The formula for barium chloride dissolved in water and its physical state needs to be determined.

Concept introduction:

Liquid has no fixed shape but has fixed volume. Liquids can flow and changes their shape. Thus they are no rigid but liquids are called fluid.

Answer to Problem 62A

Barium chloride would be described by the formula ${\text{BaCl}}_{\text{2}}\left(aq\right)$.

Explanation of Solution

The element that is found in barium chloride is barium and chloride. Barium chloride is dissolved in water thus described with the subscript (aq). It is an ionic compound. In chemical equation barium chloride would be described by the formula ${\text{BaCl}}_{\text{2}}\left(aq\right)$.

(d)

Interpretation Introduction

Interpretation:

The formula for solid ammonium carbonate and its physical state needs to be determined.

Concept introduction:

Solids have tendency to maintain their structure because in solids intermolecular force of attraction is higher than liquids and gases. They have a fixed shape thus solids are rigid.

Answer to Problem 62A

Solid ammonium carbonate would be described by the formula ${\left({\text{NH}}_{\text{4}}\right)}_{\text{2}}{\text{CO}}_{\text{3}}\left(s\right)$.

Explanation of Solution

Element that found in solid ammonium carbonate are nitrogen, hydrogen, carbon and oxygen. Solid ammonium carbonate is a salt that consists of ammonium polyatomic cation and carbonate polyatomic anion in solid state. In chemical equation solid ammonium carbonate would be described by the formula ${\left({\text{NH}}_{\text{4}}\right)}_{\text{2}}{\text{CO}}_{\text{3}}\left(s\right)$.