# Amount of Substance

Relative atomic masses

Relative molecular masses

The mole

The ideal gas equation

Empirical/Molecular formulas

Moles in Solution

Balanced equations and related calculations

Balanced equations

Atom economies

Percentage yield

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What is Relative atomic mass?
It is the weighted average mass of an atom of an element, taking into consideration naturally occuring isotopes, relative to a twelth of the mass of an atom of carbon-12
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What is relative molecular mass?
It is the mass of the molecule compared to a twelth of the mass of an atom of carbon-12
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How do you work out the relative molecular mass of a molecule?
You add up all the relative molecular masses of the molecule.
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Where do you find the relative atomic mass?
the number above the element name on the periodic table.
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It is the number of atoms in 12g of carbon-12, which is 6.022×10 (to the) 23 mol-1
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What is a mole?
The amount of substance that contains 6.022x10 (to the) 23 particales.
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How can you work out the number of moles of a substance?
Moles= mass in g/ molecular mass
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## Other cards in this set

### Card 2

#### Front

What is relative molecular mass?

#### Back

It is the mass of the molecule compared to a twelth of the mass of an atom of carbon-12

### Card 3

#### Front

How do you work out the relative molecular mass of a molecule?

### Card 4

#### Front

Where do you find the relative atomic mass?