Chapter 2.3, Problem 27LC

(a)

Interpretation Introduction

Interpretation: Table sugar must be classified as an element, compound, or mixture.

Concept Introduction: A compound that is made up of two or more chemical components that are not chemically linked with each other is said to be a mixture.

The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 27LC

Compound.

Explanation of Solution

Table sugar is made up of the chemical combination of three atoms, carbon, hydrogen, and oxygen. The chemical combination of these atoms makes up table sugar and thus, it is classified as a compound.

(b)

Interpretation Introduction

Interpretation: Tap water must be classified as an element, compound, or mixture.

Concept Introduction: A compound that is made up of two or more chemical components that are not chemically linked with each other is said to be a mixture.

The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 27LC

Mixture.

Explanation of Solution

Several minerals, chlorine, air, and other dissolved impurities are present in tap water. It is a homogenous mixture of water and substances that are dissolved in the water. Thus, it is classified as a mixture as the constituents are not chemically bonded with each other.

(c)

Interpretation Introduction

Interpretation: Cough syrup must be classified as an element, compound, or mixture.

Concept Introduction: A compound that is made up of two or more chemical components that are not chemically linked with each other is said to be a mixture.

The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 27LC

Mixture.

Explanation of Solution

A concentrated solution of sugar and water is used to make cough syrup that may or may not contain a flavoring agent or medicinal substance. Thus, it is classified as a mixture as the constituents are not chemically bonded with each other.

(d)

Interpretation Introduction

Interpretation: Nitrogen must be classified as an element, compound, or mixture.

Concept Introduction: A compound that is made up of two or more chemical components that are not chemically linked with each other is said to be a mixture.

The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.

The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.

Answer to Problem 27LC

Element.

Explanation of Solution

Nitrogen is classified as an element as it is a pure substance that contains only one type of atom.