3.1 - relative formula mass
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how do you calculate the relative formula mass of a compound?
add together all the relative atomic masses of the atoms in the compound
2
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what is the relative atomic mass of an element?
the average of all the isotopes of that element. it is the larger number in the periodic table (mass number)
3
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how is relative formula mass represented in letters?
Mr
4
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how is relative atomic mass represented in letters?
Ar
Note 
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