What is the difference between a pure substance and a mixture?

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What is the difference between a pure substance and a mixture?

 

A pure substance is composed of only one type of atom or molecule; a mixture is a substance composed of two or more different types of atoms or molecules.

A pure substance is a substance composed of two or more different types of atoms or molecules that can be combined in variable proportions; a mixture is a substance composed of two or more different types of atoms or molecules that can be combined in fixed proportions.

A pure substance is a substance composed of two or more different types of atoms or molecules that can be combined in fixed proportions; a mixture is a substance composed of two or more different types of atoms or molecules that can be combined in variable proportions.

A pure substance is a substance composed of two or more different types of atoms or molecules; a mixture is a substance of only one type of atom or molecule.

 

asked May 5, 2012 in General Chemistry by Gummmys ~Expert~ (1,105 points)
    

1 Answer

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Best answer
A. is the correct answer:

A pure substance is composed of only one type of atom or molecule; a mixture is a substance composed of two or more different types of atoms or molecules.
answered May 5, 2012 by kirby ~Expert~ (3,020 points)
selected May 5, 2012 by Gummmys

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