Equations

Question 1

What is the formula for calculating moles using mass?

Answer 1

Moles = Mass (g) / Relative Formula Mass (M r or Molar Mass (g/mol))

Relative Formula Mass is the sum of the atomic masses of all atoms in a formula.

Question 2

What is the formula for calculating moles using concentration and volume?

Answer 2

Moles = Concentration (mol/dm³) × Volume (dm³)

Concentration is expressed in moles per cubic decimeter.

Question 3

What is the relationship between moles and volume at standard conditions?

Answer 3

Moles = 24 × Volume (dm³)

This applies to gases at standard temperature and pressure (STP).

Question 4

Fill in the blank: Moles = _______ / Relative Formula Mass (M r or Molar Mass (g/mol)).

Answer 4

Mass (g)

Question 5

True or False: The formula for moles can be expressed as Moles = Concentration × Volume.

Answer 5

True

Question 6

What unit is used to express concentration in the formula for calculating moles?

Answer 6

mol/dm³

This unit indicates moles of solute per cubic decimeter of solution.

Question 7

What unit is used for volume in the moles calculations?

Answer 7

dm³