EBK FOUNDATIONS OF COLLEGE CHEMISTRY
EBK FOUNDATIONS OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781118930144
Author: Willard
Publisher: JOHN WILEY+SONS INC.
Question
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Chapter 3, Problem 17PE

(a)

Interpretation Introduction

Interpretation:

Hot tea has to be classified as a compound or an element.

Concept Introduction:

Pure substance:  A single component that has a constant composition, irrespective of the sample size and the sample origin is called as pure substance.  A pure substance could not be broken down to other pure substances by any physical change.

Example:  Water, sugar etc.

A pure substance can be classified into an element and a compound.

Element:  A pure substance, which cannot be broken down into smaller substances by a chemical reaction is called as an element.

Example:  Hydrogen gas, Magnesium ribbon and copper wire etc.

Compound:  A pure substance that is formed by combination of two or more elements by chemical process is called as a compound.  Example:  Sodium chloride is a compound because it is formed from elements sodium and chlorine.

(b)

Interpretation Introduction

Interpretation:

Beach sand has to be classified as an element or a compound.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Carbon dioxide has to be classified as a compound or an element.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

Cement has to be classified as an element or a compound.

Concept Introduction:

Refer to part (a).

(e)

Interpretation Introduction

Interpretation:

Zinc has to be classified as an element or a compound.

Concept Introduction:

Refer to part (a).

(f)

Interpretation Introduction

Interpretation:

Vinegar has to be classified as an element or a compound.

Concept Introduction:

Refer to part (a).

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