Molecular Formulas
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Molecular Formula | Chemical formula indicates the type and the number of atoms in a molecule. Subscripts are actual numbers of atoms per molecule (P4O10= 4 mole P and 10 mole O). Multiply empirical subscripts by n to get molecular subscripts
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| Molecular formula | = n (Empirical Formula)
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| n= | Molar Mass of compound/Empirical Formula Mass
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| Molecula formula = 2 (P2O5) | = P4O10
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| Molecular Formula from Empirical Formula and Molar Mass: Step 1 | Convert each mole of element from Empirical Formula to mass
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| Molecular Formula from Empirical Formula and Molar Mass: Step 2 | Empirical Formula Mass is the total mass of all elements
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| Molecular Formula from Empirical Formula and Molar Mass: Step 3 | Determine "n" by dividing the Molar Mass by the Empirical Formula Mass
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| Molecular Formula from Empirical Formula and Molar Mass: Step 4 | Round "n" to the nearest whole number
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| Molecular Formula from Empirical Formula and Molar Mass: Step 5 | Molecular Formula = n x Empirical Formula
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nikkimem32
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