AP Chemistry Unit 3

C_diamond

• metallic

• atomic/molecular

• covalent network

• ionic

Tags

NGSS.HS-PS1-3

Au

• metallic

• atomic/molecular

• covalent network

• ionic

Which statement explains why Br₂ is a liquid at STP and I₂ is a solid at STP?

• Molecules of Br₂ are polar, and molecules of I₂ are nonpolar

• Molecules of Br₂ are nonpolar, and molecules of I₂ are polar

• Molecules of Br₂ have stronger intermolecular forces than molecules of I₂.

• Molecules of I₂ have stronger intermolecular forces than molecules of Br₂.

Tags

NGSS.HS-PS1-3

Which of the following would be expected to deviate most from ideal gas behavior?

• He

• NH₃

• CH₄

• CO₂

As temperature rises ___________.

• an atom's kinetic energy decreases

• an atom's kinetic energy increases

• an atom's kinetic energy stays the same

Tags

NGSS.HS-PS3-2

A gas of volume V is placed in a balloon. The absolute (Kelvin) temperature is tripled. The volume will be _____ what it was originally. 

• 1/3

• 1/6

• 3 times

• 6 times

A gas of volume V is placed in a balloon.  Determine the new volume of the balloon if the pressure is tripled. The new volume will be ____ what it was originally.  

• 1/3 of

• 1/6 of

• 1/9 of

•  9 times

2.45 mole of LiBr is dissolved to make a 0.750 L of solution. What is the molarity?

• 3.27 M

• 0.306 M

• 0.0376 M

Tags

SPQ-3.A

Which of the following questions about the components in a mixture could be investigated with a paper chromatography experiment?

• Do the components have different densities?

• Do the components have different molecular masses?

• Do the components have different molecular polarities?

• Do the components have different average molecular speeds?

Tags

SPQ-3.C

Which compound is the LEAST soluble in water?

• CH₃CH₂CH₂CH₃

• CH₃CH₂CH₂OH

• CH₃COCH₃

• CH₃COOH

• CH₃CH₂CH₂NH₂

Tags

SPQ-3.C