# Equations

What is meant by the relative atomic mass of an element?
How heavy an atom of an element is compared to an atom of carbon-12.
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How do you find out the relative atomic mass?
On the periodic table, the bigger number of an element is the relative atomic mass.
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How do you find out the relative formula mass of a compound?
You add the all of the relative atomic masses together.
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How do you find out the number of moles of a substance?
Number of moles = mass(in g)/relative formula mass(Mr).
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How do you calculate the % mass of an element in a compound?
percentage mass of an element in a compound = relative atomic mass(Ar)/relative formula mass(Mr) x 100.
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How do you find the empirical formula?
1) List all of the elements in the compound
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## Other cards in this set

### Card 2

#### Front

How do you find out the relative atomic mass?

#### Back

On the periodic table, the bigger number of an element is the relative atomic mass.

### Card 3

#### Front

How do you find out the relative formula mass of a compound?

#### Back ### Card 4

#### Front

How do you find out the number of moles of a substance?

#### Back ### Card 5

#### Front

How do you calculate the % mass of an element in a compound?

#### Back 