Chapter 3, Problem 66A

(a)

Interpretation Introduction

Interpretation:

The given statement should be corrected.

Concept introduction:

There are different substances present in the universe. The elements and the compounds are referred to as the substances.

Answer to Problem 66A

The compound is a combination of two or more elements.

Explanation of Solution

The element is a pure substance which cannot be broken down to form other substance. In the environment, every element is composed of a single type of atoms, which makes the chemical elements unique. All the substances in the universe contains the atoms of one or more elements.

The compound can be defined as a substance that contains two or more than two elements by a chemical bond. The elements in the compounds are present in a fix ration that determine its composition and chemical properties. The ratio of the elements present in the compound is represented by a fixed chemical formula.

(b)

Interpretation Introduction

Interpretation:

The given statement should be corrected.

Concept introduction:

The mixture can be defined as a physically combined material made up of two or more different substances. The mixture can be of two types, heterogenous or homogenous. Heterogenous mixture is when the substances present in the mixture have different phases and the homogenous mixture is when the all the substances are present in the same phase.

Answer to Problem 66A

When a small amount of sugar is dissolved in water a homogeneous mixture is formed.

Explanation of Solution

When the sugar is added in water, it is completely dissolved. The phase of the mixture of the sugar and water is liquid. When the mixture is present in a single phase and the material in the mixture is evenly distributed, it is known as a homogeneous mixture.