1.2/S1.4.4 Empircal and Molecular Formula [SL IB Chemistry]s

What is the empirical formula?

• The simplest ratio of atoms in a molecule

• The number of each atom in a molecule

• The molecular formula

• The ratio of carbon and hydrogen atoms

What does the molecular formula show?

• The simplest ratio of atoms in a molecule

• The number of each atom in a molecule

• The ratio of carbon and hydrogen atoms

• The number of carbon and hydrogen atoms

What is the empirical formula of benzene?

• C6H6

• CH

• C2H2

• C3H3

Can you go from the empirical to the molecular formula?

• Yes, by adding more information

• Yes, by subtracting more information

• No, it is not possible

• No, unless given more information

What is the molecular formula of benzene?

• C6H8

• C6H7

• C6H5

• C6H6

How can you simplify the ratio in the MOLECULAR formula?

• Divide all the subscripts by their greatest common divisor (GCD)

• Subtract all the subscripts from each other

• Add all the subscripts together

• Multiply all the subscripts by their greatest common divisor (GCD)

What does the molecular formula indicate?

• The mass of a molecule.

• The shape and structure of a molecule.

• The temperature at which a molecule boils.

• The number and types of atoms present in a molecule.

Which pair has the same empirical formula?

• NaCrO₄ and Na₂Cr₂O₇
• C₂H₄O₂ and C₆H₁₂O₆
• C₃H₆O₃ and C₂H₆O₂
• CH₄ and C₂H₆

What is the empirical formula for the following molecular formula: C₆H₁₄

• C₆H₁₄
• C₃H₇
• CH₂
• CH₃

Which of the following is considered an empirical formula?

• CH₃COOH

• C₆H₁₂O₆

• H₂O

• Mg₂Cl₄