Thou Shalt Not Forget AP Chemistry

Choose the correct shape for this molecule:

• Trigonal planar

• Trigonal pyramidal

• Tetrahedral

• Linear

When an electron is in a higher energy level, it is farther away from the nucleus and has less Coulombic attraction to the nucleus and is therefore easier to remove

• True

• False

Tags

NGSS.HS-PS2-4

The greater the electronegativity difference between 2 atoms, the more polar the bond becomes.

• True

• False

Tags

NGSS.HS-PS1-2

When calculating ΔH from chemical equations with known enthalpies, if you double reaction coefficients, what happens to the overall ΔH value?

• it doubles

• it is squared

• the sign changes

• nothing

What is the study of matter and how it changes?

• Biology

• Physics

• Chemistry

• Geology

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

When calculating ΔH from chemical equations with known enthalpies, if you reverse the reaction, what happens to the overall ΔH value?

• the sign for ΔH changes

• it doubles

• it is squared

• nothing

Tags

NGSS.HS-PS1-4

A single bond is composed of

• 1 sigma bond

• 1 pi bond

• 1 sigma and 1 pi bond

• no sigma or pi bonds

A triple bond is composed of

• 1 sigma bond

• 1 pi bond

• 2 pi bonds

• 1 sigma and 2 pi bonds

Which of these is false in terms of speeding up reactions?

• Adding a catalyst lowers the activation energy

• increasing reactant concentration increases collisions

• increasing surface area decreases collisions

• increasing temperature increases collisions

Tags

NGSS.HS-PS1-5

What happens to K if a reaction is reversed?

• K

• K²

• 2K

• -K

Tags

NGSS.HS-PS1-6