Empirical and Molecular Formula 2.0

What is the relative atomic mass (Aᵣ) of oxygen?

• 8

• 12

• 16

• 32

How many moles are there in 18 g of water (H₂O)?

Hint: Find molar mass of water

• 1 mole

• 2 moles

• 3 moles

• 0.5 mole

Which of the following is a correct molecular formula?

• CH

• CH₂O

• CO₂

• 3. C₆H₁₂O₆

What information does the empirical formula give you?

• Exact number of atoms of each element

• Simplest whole number ratio of atoms

• Molar mass of compound

• Type of chemical bonds

In a combustion reaction, hydrocarbon + O₂ → ?

• CO and H₂O

• CO₂ and H₂

• CO₂ and H₂O

• C and H₂O

Which unit is used for molar mass?

• g

• mol

• g/mol

• mol/g

8. The molecular formula of a compound is C₆H₁₂O₆. What is the empirical formula?

What is the correct definition of a molecular formula?

• The total mass of a molecule in grams per mole

• The ratio of elements in their simplest form

• The actual number of atoms of each element in a molecule

• The number of molecules in one mole of a substance