Understanding Atomic and Formula Mass

What is the definition of relative atomic mass?

• The mass of an atom compared to 1/12th of the mass of a carbon-12 atom.

• The mass of a molecule compared to 1/12th of the mass of a carbon-12 atom.

• The mass of an atom compared to the mass of a hydrogen atom.

• The mass of a molecule compared to the mass of a hydrogen atom.

How do you calculate the relative formula mass of a compound?

• By adding the relative atomic masses of all the atoms in the compound.

• By multiplying the relative atomic masses of all the atoms in the compound.

• By subtracting the relative atomic masses of all the atoms in the compound.

• By dividing the relative atomic masses of all the atoms in the compound.

What is the difference between relative atomic mass and relative formula mass?

• Relative atomic mass is for atoms, while relative formula mass is for molecules.

• Relative atomic mass is for molecules, while relative formula mass is for atoms.

• Relative atomic mass is always larger than relative formula mass.

• There is no difference between the two.

What are the units of relative atomic mass?

• Grams

• Kilograms

• Atomic mass units (amu)

• It has no units.

Which of the following is an example of calculating relative formula mass?

• All of the above

What is the relative atomic mass of carbon?

• 12

• 14

• 16

• 18

• 16

• 17

• 18

• 19

Which of the following statements is true?

• Relative atomic mass is used for compounds.

• Relative formula mass is used for individual atoms.

• Relative atomic mass is used for individual atoms.

• Relative formula mass is used for elements.

• 58.5

• 59.5

• 60.5

• 61.5

Which of the following is NOT a correct example of relative formula mass calculation?