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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 1.3, Problem 2RC
Textbook Problem
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Which of the following is not characteristic of a pure substance?

  1. (a) Has a uniform composition throughout
  2. (b) Has a fixed melting temperature
  3. (c) Can be separated into two other pure substances

Interpretation Introduction

Interpretation:  The incorrect characteristics about pure substance of the given following to be identified.

Concept introduction:

Pure Substance: It can be defined as substances that are made of only one type of atom or molecule. Fixed composition and cannot be further purified.

Element: An element is consists of only one type of atom.

Compound: A compound consists of more than one type of atom, where the atoms are connected through chemical bonds and occur in a definite proportion by mass.

Explanation of Solution

Reason for correct option:

  1. c) Can be separated into two pure substances: The term pure substance always contain only the fixed composition or only one type of atoms. But the given characteristic ‘can be separated into two other pure substances’ indicates the mixture (mixing of two substances) was present at the beginning and after separation process, the pure substances are separated. Hence, it is not the characteristic of a pure substance.

Hence the correct option is option (c)...

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Chemistry & Chemical Reactivity
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