Chapter 3.1, Problem 2SSC

Interpretation Introduction

Interpretation:

The characteristics that identify a sample of matter as a substance should be described.

Concept introduction:

A substance is a simply pure matter which has specific properties and distinct composition. A substance may be illustrated as any material with a specific chemical composition.

The substances which are free from any kind of mixture and comprise an only single type of particle/element are clear/pure substances. For example, sodium chloride (table salt), tin, iron, sucrose (pure sugar), sodium bicarbonate (baking soda), etc.

Answer to Problem 2SSC

The composition and the arrangement of the particles in the unknown sample, explain and identify the sample as a substance.

Explanation of Solution

Physical properties are the physical appearance of any substance. They are constant for each substance. The matter is found in three states like solid, liquid, and gas.

The physical properties of substances are constant and they do not change by the other factor. These are constant for particular states of matter. The uniform composition and the fixed ratio express special features of the substances. They are not affected by increasing or decreasingthe number of substances. The intermolecular space, the force of attraction, and other factors are categorized in state of matter.

Conclusion

The composition and the constant ratio of molecules describe the characteristic of a sample to classify as a substance.