Carbon dioxide has the chemical formula CO2. What is the ratio of Carbon atoms to Oxygen atoms?

There is one carbon atom for every two oxygen atoms.

There are an equal number of carbon atoms and oxygen atoms.

There is one oxygen atom for every two carbon atoms.

There are two carbon atoms for every one oxygen atom.

Which of the following is an example of a chemical change?

Leaves changing color in the fall

Which of the following is an example of a physical change?

leaves changing color in the fall

water separating into oxygen and hydrogen

Compound Practice Quiz

10 Questions | By Bedner | Updated: Oct 31, 2013 | Attempts: 168

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Questions and Answers

1.

Compounds are made from just one element.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
2.

Elements are formed through chemical reactions.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
3.

Compounds are found on the periodic table.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
4.

Both elements and compounds are essential for life.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
5.

While working in his lab Jonathan discovered a new substance with the chemical formula: CuO₂HFeSO₄ How many different elements make up this compound?
- A.
  
  8
- B.
  
  10
- C.
  
  6
- D.
  
  5
Correct Answer
D. 5
6.

How many total atoms are found in the compound: CuO₂HFeSO₄
- A.
  
  8
- B.
  
  10
- C.
  
  12
- D.
  
  6
Correct Answer
B. 10
7.

Which of the following is a compound?
- A.
  
  Cd
- B.
  
  C
- C.
  
  CO
- D.
  
  Co
Correct Answer
C. CO
8.

Carbon dioxide has the chemical formula CO₂. What is the ratio of Carbon atoms to Oxygen atoms?
- A.
  
  There are an equal number of carbon atoms and oxygen atoms.
- B.
  
  There is one oxygen atom for every two carbon atoms.
- C.
  
  There is one carbon atom for every two oxygen atoms.
- D.
  
  There are two carbon atoms for every one oxygen atom.
Correct Answer
C. There is one carbon atom for every two oxygen atoms.
9.

Which of the following is an example of a chemical change?
- A.
  
  Paper tearing
- B.
  
  Sugar dissolving in water
- C.
  
  Leaves changing color in the fall
- D.
  
  Mixing salt, flour, and sugar
Correct Answer
C. Leaves changing color in the fall
10.

Which of the following is an example of a physical change?
- A.
  
  Leaves changing color in the fall
- B.
  
  Chopping wood
- C.
  
  Burning wood
- D.
  
  Water separating into oxygen and hydrogen
Correct Answer
B. Chopping wood

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Current Version
Oct 31, 2013

Quiz Edited by
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Oct 31, 2013

Quiz Created by
Bedner

Compound Practice Quiz

Compounds are made from just one element.

Elements are formed through chemical reactions.

Compounds are found on the periodic table.

Both elements and compounds are essential for life.

While working in his lab Jonathan discovered a new substance with the chemical formula: CuO2HFeSO4 How many different elements make up this compound?

How many total atoms are found in the compound: CuO2HFeSO4

Which of the following is a compound?

Carbon dioxide has the chemical formula CO2. What is the ratio of Carbon atoms to Oxygen atoms?

Which of the following is an example of a chemical change?

Which of the following is an example of a physical change?

While working in his lab Jonathan discovered a new substance with the chemical formula: CuO₂HFeSO₄ How many different elements make up this compound?

How many total atoms are found in the compound: CuO₂HFeSO₄

Carbon dioxide has the chemical formula CO₂. What is the ratio of Carbon atoms to Oxygen atoms?