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#4. Compounds: Outcome A3

Last updated 10 months ago

12 questions

2.5 points

2.5

Question 1

1.

Which of the following are true of compounds? (check off all the boxes that are correct)

They are atoms composed of molecules of two or more elements

They are molecules composed of atoms of two or more elements

They can be broken down into their elements

They cannot be broken down into their elements

Water is an example

Carbon dioxide is an example

Pure substances may consist of compounds

1 point

1

Question 2

2.

What does the subscript "g" in the following chemical equation tell us? H2O(g)

Water is in liquid form

Water is in gaseous form

Water is in solid form

1 point

1

Question 3

3.

How many atoms are present in the following chemical equation? NaHCO3 (s)

6

5

4

3

1 point

1

Question 4

4.

How many elements are present in one molecule of hydrogen peroxide, H2O2?

1

2

3

4

1 point

1

Question 5

5.

Which of the following elements are NOT present in freon-12, CCl2F2?

Carbon

Iodine

Chlorine

Fluorine

1 point

1

Question 6

6.

How many atoms of hydrogen are present in each glucose molecule (C6H12O6)?

1

2

6

12

1 point

1

Question 7

7.

In an investigation of the decomposition of water, a student observes that 2 gases are being formed. What are the gases?

water vapour and CO2 gas

hydrogen and oxygen

air and oxygen

Use the following picture for the next 5 questions

1 point

1

Question 8

8.

What is the name of the first element in the compound?

1 point

1

Question 9

9.

What is the name of the second element in the compound?

1 point

1

Question 10

10.

How many different elements are in this compound?

1

2

3

4

5

1 point

1

Question 11

11.

Question 11: What is the TOTAL number of atoms in the compound?

1

2

3

4

5

1 point

1

Question 12

12.

Question 12: What is the state of this compound?

a. solid

b. liquid

c. gas