Honors Chemistry Final 2025

Reactions

100

What type of reaction is represented by the general equation: A + BC → AC + B?

Single Replacement Reaction

200

Which element must be a reactant for a reaction to be classified as a combustion reaction?

Oxygen (O₂)

300

In a chemical reaction, what does the symbol (aq) mean?

Aqueous or dissolved in water

400

Identify this reaction type:

Li₂O -> Li + O₂

Decomposition Reaction

500

Convert the following word equation into a chemical formula (no balancing needed):

Ag₃AsO₄ + CaSO₄ → Ca₃(AsO₄)₂ + Ag₂SO₄

Mols

100

What is the molar mass of Ba₃(PO₄)₂?

601.93g/mol

200

How many moles are in 14267g of solid sodium hydroxide (NaOH)?

356.68 mols of NaOH

300

How many ions are contained in 9.4g of potassium oxide, K₂O? Assume Avogadro's constant is 6 x 10²³

1.8*10²³

400

What is the percent of each element in (NH₄)₂(SO₄)?

N: 21.20%

H: 6.10%

S: 24.25%

O: 48.44%

500

Determine the empirical and molecular formula for chrysotile asbestos. Chrysotile has the following percent composition: 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. The molar mass for chrysotile is 520.8 g/mol.

 Mg₃Si₂H₃O₈ (empirical formula), Mg₆Si₄H₆O₁₆ (molecular formula)

Stoichometry

100

ZnCl₂ -> Zn²⁺ + 2Cl^-

If 120g of Cl^- was produced, how many grams of ZnCl₂ were consumed?

230.7g ZnCl₂

200

NaCl + K -> KCl + Na

If 173g of NaCl and 137g of K are used, what is the excess reactant, and how many mols are left once the reaction is completed?

K

0.540 mols of K

300

P₂O₅ + 3H₂O -> 2H₃PO₄

If 200.0g of P₂O₅ and 55.0g of H₂O are used, how many grams of H₃PO₄ are produced.

199g H₃PO₄

400

CH₄ + 2O₂ -> CO₂ + 2H₂O

If 60.0g of CH₄ are combusted, how many grams of CO₂ are produced?

165g CO₂

500

2H₂ + O₂ -> 2H₂O

How many grams of H₂O are produced when 4.0g of H₂ are reacted with excess oxygen?

36g H₂O

VESPR/Lewis Structures

100

The geometric name for the VESPR structure of H₂O

What is Bent.

200

The number of resonance structures ClO₃^- can form.

What are 3

300

The bond angles of the See-Saw or Sawhorse VESPR formation.

What are 90 and 120 degrees.

400

The hybidization of SF₆

What is sp3d²

500

Explain why NO₂ has a resonance structure.

The double bond could be formed on either oxygen.

Naming chemicals

100

What is the chemical name of salt? What is the chemical formula of salt?

Chemical name: Sodium chloride
Chemical formula: NaCl

200

Identify the type and name of Ni₂O₃

Type: Type II ionic compound
Name: Nickel(III) oxide

300

Which of the following is the correct name for the molecular compound N₂O₅?
a. nitrogen oxide
b. pentanitrogen dioxide
c. dinitrogen pentoxide
d. nitrogen (II) oxide

c. dinitrogen pentoxide

400

Which of the following is the correct formula for calcium phosphate?
a. Ca₃(PO₄)₂
b. CaPO₄
c. Ca₂(PO₄)₃
d. Ca₄(PO₂)₂

a. Ca₃(PO₄)₂

500

Name a compound that is type II and binary. It is also an ionic compound.

Example: FeCl₃ — Iron(III) chloride