C1 Chemistry - % of mass and empirical formula Flashcards Preview

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Flashcards in C1 Chemistry - % of mass and empirical formula Deck (3)
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1

what is a simple way of describing the relative formula mass

add up all the relative formula atomic masses

2

how do you work out the % mass of an element in a compound?

relative atomic mass x no* of atoms
____________________________ x 100
relative mass

3

what are the 5 stages of finding the empirical formula

1. list all elements in the compound
2. write their masses or percentage
3. divide each mass or % by the relative atomic mass
4. multiple or divide by well chosen no*s
5. get the ratio to simplest form
that tells you empirical formula of the compound