Calculating Empircal Formula: Flashcards
What is the empirical formula?
= simplest whole number ratio of the atoms of each element in a compound.
How do we work out the empirical formula?
= from the molecular formula
= dividing all the numbers by the smallest
How do we calculate the empirical formula?
= calculate the number of moles
= divide the moles by the smallest number
= gives us the ratio
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How do we calculate the empirical formula when it is a percentage?
= find the moles
= divide by the smallest number of moles
=
How do we produce a whole number ratio?
= times all the ratio by 2
How do we calculate the molecular formula from the empirical formula?
= divide molecular formula mass of the compound by the relative molecular mass of the empirical formula
= tells us the multiplier
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