Understanding Molecular and Empirical Formulas

What does the molecular formula of a compound indicate?

• The total mass of the compound

• The elements and number of atoms of each element in a molecule

• The color of the compound

• The boiling point of the compound

How many carbon atoms are present in a molecule of butane?

• Four

• Six

• Two

• Eight

Which of the following is the correct molecular formula for ethanol?

• C2H5OH

• C2H6O

• C3H8O

• C2H4O2

What is the main advantage of using empirical formulas for giant structures?

• They show the exact number of atoms in large crystals

• They simplify the representation by showing the simplest ratio of elements

• They provide detailed structural information

• They indicate the color of the compound

In the empirical formula of sodium chloride, what is the ratio of sodium ions to chloride ions?

• 1:1

• 3:1

• 1:2

• 2:1