Relative formula mass
What Relative formula mass means in Combined Science GCSE, as defined for AQA.
Definitions of Relative formula mass
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Reference: AQA
A value taken from the periodic table and summed correctly for compounds, used when converting a given mass to moles using n = m ÷ Mᵣ.
Calculated by summing the relative atomic masses of all atoms in the formula of a compound.
The sum of the relative atomic masses of the atoms in the numbers shown in the formula.
This is calculated using the periodic table and used to convert between mass and moles.
Found by adding the relative atomic masses of all atoms in the formula of a substance.
The value each mass in grams is divided by to convert it to an amount in moles.
Topics that use Relative formula mass
- Amounts of substances in equations (HT only) (AQA GCSE)
- Moles (HT only) (AQA GCSE)
- Relative formula mass (AQA GCSE)
- Using moles to balance equations (HT only) (AQA GCSE)
Related terms
- Conservation of mass
- Balanced symbol equation
- Balancing numbers
- mole
- Mole ratio
- Subscripts
- Avogadro constant
- Limiting reactant
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