Chem Cal

Question 1

1.24 g Silver sulphide contains 0.16g sulfur

What is the empirical formula

Answer 1

Ag2S

Question 2

How is the magnetic field in mass spectrometer formed?

Answer 2

Electromagnet

Question 3

How does mass spectrometer work

Answer 3

electron gun bombards sample and ionises atoms/molecules (1)
negatively charged plates / electric field accelerates (positive ions in) sample (1)
electromagnet deflects ions according to mass and charge / m/z (1)
current in electromagnet / electromagnetic field is varied so different mass ions hit
detector (1)

Question 4

Without adjusting the shape of the mass spectrometer, what can be done to deflect ions with higher m/z ratio?

Answer 4

increase strength of the magnetic field