Important Equations Flashcards by Catherine Lillywhite | Brainscape

Q

Empirical formula =

A

Write 2 elements (percentage or mass)
Divide both by relative atomic mass
Divide both by the smallest RAM
If not whole numbers SCALE UP

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Q

Relative formula mass =

Eg: for NH3

A

N = 14 H = 1

14 + (1x3)

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Q

How to work out moles?

A

Mass ÷ Mr (RFM)

🔺 = mass
Mo Mr

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