Molecular Formula Review

Front

What is a molecular formula?

Back

A molecular formula shows the number and type of atoms in a molecule, indicating the actual number of each element present in a compound.

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

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

Back

To find the molecular formula, divide the molecular mass by the empirical formula mass and multiply the subscripts in the empirical formula by this ratio.

Front

What is the empirical formula for glucose (C6H12O6)?

Back

The empirical formula for glucose is CH2O.

Front

If the empirical formula is CH2O and the molecular mass is 180 g/mol, what is the molecular formula?

Back

C6H12O6.

Front

What is the empirical formula of a compound with a molecular formula of C4H8?

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The empirical formula is C2H4.

Front

What is the molecular mass of CaCl2?

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The molecular mass of CaCl2 is approximately 110.98 g/mol.

Front

Given the empirical formula C2H4 and a molecular mass of 28 g/mol, what is the molecular formula?

Back

C2H4.

Front

What is the significance of the molecular formula in chemistry?

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The molecular formula provides information about the composition of a compound, which is essential for understanding its properties and reactions.

Front

How do you calculate the empirical formula mass?

Back

Add the atomic masses of all atoms in the empirical formula.