AP Chemistry : Elemental Composition of Pure Substances

Study concepts, example questions & explanations for AP Chemistry

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Example Questions

Example Question #51 : Elemental Composition Of Pure Substances

2

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Element

Compound

Mixture of Compounds and Elements

Mixture of Compounds

Mixture of Elements

Correct answer:

Mixture of Elements

Explanation:

This is a mixture of elements. Each different circle is one type of element. Because there are two different colors and none of them form compounds that means this is a mixture of two different elements.

Example Question #52 : Elemental Composition Of Pure Substances

3

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Mixture of Elements

Mixture of Compounds and Elements

Compound

Mixture of Compounds

Element

Correct answer:

Mixture of Compounds

Explanation:

There are two different molecules in this picture, but because there are no single circles that means this picture is only a mixture of compounds.

Example Question #53 : Elemental Composition Of Pure Substances

4

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Mixture of Compounds and Elements

Mixture of Compounds

Element

Mixture of Elements

Compound

Correct answer:

Element

Explanation:

This picture only contains pictures separate circles. All the circles are the same color. Therefore this is a picture of just one element.

Example Question #54 : Elemental Composition Of Pure Substances

5

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Element

Compound

Mixture of Elements and Compounds

Mixture of Elements

Mixture of Compounds

Correct answer:

Mixture of Elements and Compounds

Explanation:

This picture contains circles that are two different colors. There is also a molecule. Therefore this is a Mixture of Compounds and Elements.

Example Question #55 : Elemental Composition Of Pure Substances

6

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Element

Compounds

Mixture of Compounds and Elements

Mixture of Compounds

Mixture of Elements

Correct answer:

Mixture of Compounds and Elements

Explanation:

This picture contains one element (single circles) and compounds (joined circles). Therefore this is a Mixture of Compounds and Elements.

Example Question #56 : Elemental Composition Of Pure Substances

7

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Mixture of Compounds

Mixture of Compounds and Elements

Mixture of Elements

Compound

Element

Correct answer:

Mixture of Compounds

Explanation:

There are two different types of molecules in this picture (one with two circles, and another with three circles). Therefore this picture is a mixture of compounds.

Example Question #57 : Elemental Composition Of Pure Substances

8

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Element

Mixture of Elements

Mixture of Compounds and Elements

Mixture of Compounds

Compound

Correct answer:

Compound

Explanation:

Although it can hard to to tell, this picture just contains several of the same type of molecules. Therefore this picture is just one compound.

Example Question #58 : Elemental Composition Of Pure Substances

9

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Element

Mixture of Compounds

Mixture of Elements

Mixture of Compounds and elements

Compound

Correct answer:

Mixture of Compounds

Explanation:

This picture contains two different molecules. One with two black circles and four white circles, and another with two white circles and four black circles. Therefore this picture is a mixture of two compounds.

Example Question #59 : Elemental Composition Of Pure Substances

10

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Compound

Mixture of Compounds and Elements

Mixture of Elements

Mixture of Compounds

Element

Correct answer:

Mixture of Compounds

Explanation:

This picture contains 3 different types of molecules, but no single elements. Therefore this picture is a mixture of compounds.

Example Question #60 : Elemental Composition Of Pure Substances

12

Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together as a compound. 

Which of the following describes the contents of the given image?

Possible Answers:

Mixture of Compounds and Elements

Mixture of Elements

Mixture of Compounds

Element

Compound

Correct answer:

Compound

Explanation:

Because all the molecules in this picture are the same this picture is a picture of one compound.

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