Chemistry Practice Final Exam 2025

When air in a stoppered flask is heated, which variables are changing?

• P = pressure of the gas

• V = volume of the gas

• n = number of moles of the gas

• T = temperature of the gas

Tags

NGSS.HS-PS3-4

As the air in the stoppered flask is heated more and more, how are the particles affected?

• The particles speed up and they take up more space.

• The particles speed up but they spread apart.

• The particles speed up and collide more frequently with the container walls.

• The particles die from exhaustion.

Tags

NGSS.HS-PS3-2

A sealed balloon has 3 moles of gas in it and occupies 3 L of space. If the more gas is added until moles are doubled, what happens to the particles?

• The particles move closer together.

• The particles slow down and move closer together.

• The particles speed up and move farther apart.

• The particles just take up more space.

Tags

NGSS.HS-PS3-2

A sealed balloon has 3 moles of gas in it and occupies 3 L of space. If the more gas is added until moles are doubled, what happens to the particles? What is the new volume of the gas ?

• 6 L

• 1.5 L

• 3 L

• 0 L

Which type of relationship do volume and moles exhibit?

• Direct

• Inverse

• Genetic

What does the number of moles tell you about the particles of a gas?

• The number of individual particles

• The energy of the individual particles

• The distance between individual particles

• The speed of the individual particles

Tags

NGSS.HS-PS1-5

As a balloon is heated, what happens to the pressure exerted by the gas particles?

• Pressure decreases because the particles are hitting the wall of the balloon less.

• Pressure is more or less constant because the balloon expands to relieve pressure.

• Pressure increases because the balloon is a rigid container.

• Pressure increases and decreases because it is confused.

Tags

NGSS.HS-PS2-1

During which segment(s) of the graph could you find a solid?

• 1 and 2

• 2 and 3

• 3 and 4

• 4 and 5

Tags

NGSS.MS-PS1-4

During which segment(s) of the graph could you find a liquid?

• 2, 3, and 4

• 1 and 2

• 1, 4, and 5

• 3 and 5

Tags

NGSS.MS-PS1-4

During which segment(s) of the graph could you find a gas?

• 4 and 5

• 1 and 2

• 2 and 3

• 3 and 4