Spring Semester Exam Review 1

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

• atomic mass of each element

• number of atoms or ions of each element that are combined in the compound

• formula mass

• charges on the elements or ions

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

• 1

• 2

• 4

• 5

What is the formula for the compound formed by calcium & chloride ions?

• CaCl

• Ca₂Cl

• CaCl₃

• CaCl₂

Name the compound KClO₃.

• potassium chloride

• potassium trioxychlorite

• potassium chlorate

• hypochlorite

Which of the following compounds does not contain a polyatomic ion?

• sodium carbonate

• sodium sulfate

• sodium sulfite

• sodium sulfide

Name the compound Al₂S₃.

• aluminum sulfate

• aluminum sulfur

• aluminum (II) sulfate

• aluminum sulfide

What is the formula for diphosphorus pentoxide?

• P₂PeO₅

• PO₅

• P₂O₄

• P₂O₅

In a compound, the algebraic sum of the oxidation numbers of all atoms equals...

• 0

• 1

• 8

• the charge on the compound

What is the sum of the atomic masses of all the atoms in a formula for a compound?

• molecular mass

• formula mass

• atomic mass

• actual mass

When a solid produced by a chemical reaction separates from the solution it is called

• a precipitate

• a reactant

• a molecule

• the mass of the product