Empirical and Molecular Formulas

Front

What is an empirical formula?

Back

An empirical formula represents the simplest whole-number ratio of atoms of each element in a compound.

Front

What is a molecular formula?

Back

A molecular formula shows the actual number of atoms of each element in a molecule of a compound.

Front

How do you determine the empirical formula from a molecular formula?

Back

To find the empirical formula, divide the subscripts in the molecular formula by their greatest common divisor.

Front

Given the molecular formula C2H6, what is the empirical formula?

Back

The empirical formula is CH3.

Front

What is the significance of subscripts in a chemical formula?

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Subscripts indicate the number of atoms of each element in a molecule.

Front

What is the empirical formula of C4H10?

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The empirical formula is C2H5.

Front

If the empirical formula is CH2 and the molar mass is 28 g/mol, what is the molecular formula?

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The molecular formula is C4H8.

Front

What is the empirical formula of K2SO4?

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The empirical formula is K2SO4.

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What is the empirical formula of Si2F6?

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The empirical formula is SiF3.

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What does the term 'molar mass' refer to?

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Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).