In this worksheet, we will practice calculating formula masses by summing the relative atomic masses of the constituent elements.
A sample of neon contains (mass 19.9924 u), (mass 20.9940 u) and (mass 21.9914 u). Calculate to 4 significant figures the average atomic mass of neon in this sample.
A sample of magnesium contains (mass 23.98 u), (mass 24.99 u) and (mass 25.98 u). Calculate the average atomic mass of magnesium in this sample.
What is the molar mass of methane ()?
What is the molar mass of diborane ()?
- A 36.0 g/mol
- B 66.9 g/mol
- C 35.6 g/mol
- D 27.7 g/mol
- E 19.7 g/mol
What is the molar mass of hydrazine ()?
What is the molar mass of to 2 decimal places?
- A 27.02 g/mol
- B 68.09 g/mol
- C 61.04 g/mol
- D 100.09 g/mol
- E 84.31 g/mol