Mass Spectrometry Lesson

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

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-PS1-7

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

• CH₃CH₂Cl

• CH₃CH₂CH₂NH₂

• CH₃CH₂Br

• CH₃CH₂N₂

Tags

NGSS.HS-PS1-3

What is the molecular weight of this compound?

• 29

• 87

• 54

• 15

Which of the following molecular formulas could correspond to the above mass spectrum?

• C₆H₅Br

• C₆H₅Cl

• C₆H₅CH₂Br

• C₆H₅CH₂Cl

Tags

NGSS.HS-PS1-3

Which of the following fragments could correspond to Peak C?

• ⁺CH₃

• ⁺CH₂CH₃

• ⁺CH₂CH₂CH₃

• ⁺CH₂CH₂CH₂CH₃

Which of the following fragments could correspond to Peak D?

• ⁺CH₃

• ⁺CH₂CH₃

• ⁺CH₂CH₂CH₃

• ⁺CH₂CH₂CH₂CH₃

Which of the following molecular formulas could match this mass spectra (above)?

• C₅H₁₂

• C₇H₁₆

• C₁₀H₂₂

• C₁₂H₂₆

What are the steps of operation in the mass spectrometer?

• Accelerate, Deflect,Ionize, Detect
• Deflect,Ionize, Accelerate, Detect
• Ionize, Accelerate, Deflect, Detect
• Detect, Accelerate, Deflect, Ionize

Tags

NGSS.HS-PS3-5