AP Chem Practice

Based on the spectrum, which of the following is true about the element?

• The element has an average atomic mass of

  64 u

• The most abundant isotope of the element has an atomic mass of 64u

• In an average element of this pure substance, 20% of the substance has a mass of 66 amu

• The element has an an average atomic mass between 66amu and 68amu

Tags

NGSS.HS-PS1-7

Which element is represented by this mass spectrum

• Ga

• Ge

• As

• Se

A sample of a compound containing only carbon and hydrogen atoms is completely combusted, producing 11.0 g CO₂ and 4.5 g H₂O

• CH

• CH₂

• C₂H₃

• C₂H₄

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

A student determines that a 9.8 g MgCl₂​(s) and NaNO₃ ​(s) contains 0.050 mol of MgCl₂ ​(s).

Based on the student’s measurement, what is the mass percent of Cl in the mixture?

• 15%

• 36%

• 46%

• 72%

Based on the information in the table, which of the following arranges the bonds in order of decreasing polarity?

• Al−O>As−S>H−Br

• As−S>H−Br>Al−O

• Al−O>H−Br>As−S

• H−Br>As−S>Al−O

Which of the following bonds is likely to have the most ionic character?

• N−F

• Na−F

• Mg−O

• C−O

Which of the following correctly shows the bond polarity?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The graph below shows the potential energy as a function of internuclear distance for molecular chlorine, Cl−Cl

and an unknown homonuclear diatomic molecule A−A. Which of the options likely represents A-A

• 
• 
• 
• 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which of the following arranges the bonds in order of decreasing bond length?

• 
• 
• 
• 

Which of the following diagrams best depicts the structure of a typical ionic solid?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-3