7.1 Chemical Names and Formulas Quiz

A chemical formula includes the symbols of the elements in the compounds and subscripts that indicate:

• atomic mass of each element.
• number of atoms or ions of each element that are combined in the compounds.
• formula mass.
• charges on the elements or ions.

The formula for carbon dioxide, CO2, can represent:

• one molecule of carbon dioxide.
• the combination of one atom of carbon and two atoms of oxygen.
• A and B are correct
• A and B are incorrect

Which of the following is the metallic ion in iron (III) oxide?

• Fe³
• Fe²
• O⁻²
• O⁻¹

How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF₄ ?

• 1
• 2
• 4
• 5

A chemical formula for a molecular compound represents the composition of

• a molecule
• an atom
• the ions that make up the compound
• the crystal lattice

Which formula does NOT represent a molecule?

• H₂O (water)
• CO₂ (carbon dioxide)
• NH₃ (ammonia)
• NaCl (table salt)

What is the formula for zinc fluoride?

• ZnF₂
• ZnF₃
• Zn₂F
• ZnF

what is the formula for the compound formed by calcium ions and chloride ions?

• CaCl
• CaCl₂
• CaCl₃
• Ca₂Cl

What is the formula for the compound formed by lead(II) ions and chromate ions?

• PbCrO₄
• Pb₂CrO₄
• Pb₂(CrO₄)₃
• Pb₂(CrO₄)₂

What is the correct name for Al₂(SO₄)₃?

• aluminum(II) sulfate
• dialuminum trisulfate
• aluminum sulfide
• aluminum sulfate