Semester Exam Review- Chem

Semester Exam Review

Multiple Choice

What are the coefficients when this chemical equation is balanced?

_CaCO3 + _H3PO4 --> _Ca3(PO4)2 + _H2CO3

• 3,2,1,3

• 1,1,1,1

• 2,2,1,1

Multiple Choice

Which group on the periodic table are common oxidizing agents?

• alkali metals

• halogens

• noble gases

Multiple Choice

What is occurring at the cathode of the electrochemical cell containing the reaction represented by the following equation?

Zn + Cu²⁺ → Cu + Zn²⁺

• copper gains electrons

• copper loses electrons

• oxidation of zinc

Multiple Choice

How many atoms are in 9.35 moles of lithium?

• 6.02 x 10²³ atoms

• 5.63 x 10²³ atoms

• 5.63 x 10²⁴ atoms

Multiple Choice

What is the percent composition of caffeine?

C₈H₁₀N₄O₂

• 25% C, 25% H, 25% N, 25% O

• 33.33% C, 41.67% H, 16.67% N, 8.33% O

• 49.48% C, 5.19% H, 28.85% N, 16.48% O

Multiple Choice

How many moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide react with excess iron (III) chloride according to this balanced chemical equation?

FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl

• 1.7 moles Fe(OH)₃

• 15 moles Fe(OH)₃

• 3.0 moles Fe(OH)₃

Multiple Choice

What is the mass of sodium chloride produced when 8.3 g of sodium is reacted with 4.5 g of chlorine?

2Na(_s) + Cl2(g) → 2NaCl

• 21 g NaCl

• 7.4 g NaCl

• 3.7 g NaCl

Multiple Choice

A 1.0 L container is filled with gas at 2.5 atm. Later the gas is transferred into a larger 3.0 L container. Determine the pressure of the gas in the larger container if the temperature of the gas also changed from 350 K to 298 K.

• .71 atm

• .83 atm

• .98 atm

Multiple Choice

What is the volume of 0.789 moles of gas that exerts 1.15 atm of pressure at 376 K?

R = .08206 L*atm/mol*K

• 36.5 L

• 21.2 L

• 4250 L

Multiple Choice

What is the pH of a solution that contains [H3O+] = 1×10^-8 M

• 1

• 6

• 8

Multiple Choice

What two pieces of equipment are used for a titration experiment?

• burette and Erlenmeyer flask

• burette and beaker

• test tube and Erlenmeyer flask

Multiple Choice

Which of these parts of an organic compound is an atom or group of atoms that always reacts a certain way?

• the bonds

• the carbons

• the functional groups

Multiple Choice

What is the prefix for a 7 carbon chain?

• but-

• eth-

• hept-

• prop-

• Relationship between atomic mass and molar mass

• limiting reactants

• Kinetic Molecular Theory

• Ways to increase reaction rate

• chemical equilibrium

• equivalence point

• Law of Conservation of Mass/Energy

• Combustion Reaction

• Spectator ions

• Oxidizing and Reducing agents

• Colligative properties

Define/Describe

Compare and Contrast

• Synthesis and Decomposition reactions

• Oxidizing and reducing agents

• Empirical and Molecular formulas

• Ideal and Real gases

• Kinetic and potential energy

• Arrhenius and Bronsted-Lowry Acids/Bases

• pH and pOH

• alkane, alkene, & alkyne

• RNA and DNA