Density And Kinetic Theory

Question 1

What is density?

Answer 1

The mass of unit volume of a substance

Density = Mass / Volume
D = M / V

Measured in kg / m^3

Question 2

What are the three states of matter, and how are the molecules arranged in each?

Answer 2

Solid, liquid and gas

Question 3

How are the molecules arranged in solids?

Answer 3

Molecules arranged very closely together. They vibrate about fixed positions. Solids have a fixed shape and volume, and a high density.

Question 4

How are the molecules arranged in liquids?

Answer 4

Molecules arranged close together, but not as close as solids. They can move around in any direction and are not fixed in position. Liquids have a fixed volume but take on the shape of the container.

Question 5

How are the molecules arranged in gases?

Answer 5

Molecules are very far apart with large distances between them. They move around very quickly in all directions. Gases have a low density and always completely fill their container