Organic Chemistry- Mass Spectroscopy, IR & EU Quiz Review

What do the peaks on the mass spectrum represent?

• anions

• mass of positively charged fragments

• mass of negatively charged fragments

• numbers of electrons

Which of the following is NOT a step in the operation of a mass spectrometer?

• Accelerate,

• Deflect

• Radiate

• Ionize

Tags

NGSS.HS-PS2-5

The infrared spectrum was obtained from a compound and showed absorptions at 2100 cm^-1,
1700 cm^-1, and 1200 cm^-1.  Identify the compound.

• CH₃COOCH₃
• C₆H₅COOH
• CH₂=CHCH₂OH
• CH≡CCH₂CO₂CH₃

Tags

NGSS.HS-PS4-4

A molecule has a broadband at 3200cm^-1. The molecule is most likely an...

• amide

• ester

• alcohol

• carboxylic acid

The above Mass Spectra of an unknown substance contains an M⁺ peak of 64 and an M+2 Peak. What is the molecular weight of this substance?

• 29

• 49

• 64

• 66

Tags

NGSS.HS-PS1-2

The above Mass Spectra of an unknown substance contains an M⁺ peak of 64 and an M+2 Peak. Which of the following could be the formula for this substance?

• CH₃CH₂Cl

• CH₃CH₂CH₂NH₂

• CH₃CH₂Br

• CH₃CH₂N₂

The above Mass Spectra of an unknown substance contains an M⁺ peak of 64 and an M+2 Peak. What element do the M/M+2 peaks help us identify the presence of?

• Cl

• Br

• S

• N

What is the molecular weight of this compound?

• 29

• 87

• 54

• 15

Tags

NGSS.HS-PS1-7

Looking at the following Mass Spectra and molecular ion, what element is possibly found in this compound??

• Cl

• N

• Br

• S

Tags

NGSS.HS-PS1-1

How many elements of unsaturation are found in progesterone (the molecule above)?

• 4

• 5

• 6

• 7