Quantifying Chemistry

Question 1

State what the 3 types of information that can be sourced from a mass spectrometer are

Answer 1

1. number of isotopes in a given sample
2. relative isotopic mass of each isotope
3. percentage abundance of the isotope

Question 2

State what 2 types of masses are compared to the mass of the carbon-12 isotope

Answer 2

1. Relative atomic mass

2. Relative isotopic mass

Question 3

Describe what the relative atomic and isotopic mass are compared to

Answer 3

Carbon-12 isotopic mass

Question 4

Describe Avogadro’s number

Answer 4

The number of elementary particles in exactly 12g of the carbon-12 isotope

Question 5

State how many elementary particles are present in exactly 12 g of the carbon-12 isotope

Answer 5

6.02 x 10^23 particles

Question 6

Describe the molar mass of an element

Answer 6

The mass of 1 mol of the element