Molecular vs Empirical Formulas

Front

What is the empirical formula for a compound with the molecular formula C2H4?

Back

The empirical formula is CH2.

Front

What is the difference between a molecular formula and an empirical formula?

Back

A molecular formula shows the actual number of atoms of each element in a molecule, while an empirical formula shows the simplest whole-number ratio of the elements.

Front

Which of the following compounds has the same empirical formula as C2H4? (C5H10, C3H6, C4H8)

Back

All of the above have the same empirical formula CH2.

Front

What is the empirical formula for C6H12O6?

Back

The empirical formula is CH2O.

Front

What is the molecular formula for butane?

Back

C4H10.

Front

What is the empirical formula for a compound with 40.05% sulfur and 59.95% oxygen?

Back

The empirical formula is SO3.

Front

What does the term 'molecular formula' refer to?

Back

A chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound.

Front

If a compound has a molecular formula of C5H12, what is its empirical formula?

Back

The empirical formula is CH3.

Front

How do you determine the empirical formula from percent composition?

Back

Convert the percentages to grams, then to moles, and simplify the mole ratio to the smallest whole numbers.

Front

What is the empirical formula for C3H6O3?

Back

The empirical formula is CH2O.