Chemistry Final

1. Which is NOT an element?

He

N

NaCl

Mg

2. The _______ is the complete arrangement of electrons in an atom and determines how the atom will chemically bond and influences the orientation of its orbital in space, and its spin.

Electron configuration

Orbital science

Chemical properties of an atom

3. All of the following are biological polymers except –

Proteins

Petroleum

Lipids

DNA

4. In which situation is a chemical reaction occurring?

Salt dissolving in water

A nail rusting

Ice melting

A glass window breaking

5. What coefficient is needed in front of NH₃ in order for the following equation to be balanced? N₂ + H₂ → NH₃

2

3

4

6

6. What coefficient is needed in front of NH₃ in order for the following equation to be balanced? N₂ + H₂ → NH₃

2

3

4

5

7. In which situation is a chemical reaction occurring?

Salt dissolving in water

A nail rusting

Ice melting

A glass window breaking

8. All of the following are biological polymers except –

Proteins

Petroleum

Lipids

DNA

9. Fossil fuels that contain carbon, such as coal, petroleum and natural gas, combine with oxygen to produce carbon dioxide gas and energy often in the form of heat. These processes are example of which type of reactions?

Endothermic reactions

Exothermic reaction

Metabolic reactions

Replacement reactions

10. If a water solution conducts electricity, what must the solute be?

Solid

Liquid

Electrolyte

Nonelectrolyte

11. All of the following speed up the dissolving process except _______.

Stirring the solution

Increasing the size of the solid to be dissolved

Increasing the temperature of the solvent

Crushing the solid to be dissolve

12. A hydrocarbon is composed of –

Carbons only

Carbon, hydrogen, and other atoms

Carbon and hydrogen only

Carbon plus a variety of other elements

13. Fossil fuels that contain carbon, such as coal, petroleum and natural gas, combine with oxygen to produce carbon dioxide gas and energy often in the form of heat. These processes are example of which type of reactions?

Endothermic reactions

Exothermic reaction

Metabolic reactions

Replacement reactions

14. What is the name of the OH^- ion?

Anhydride

Oxide

None of the above

15. How many electrons does an atom of the element mercury (Hg) have?

12

121

80

201

16. What is the mass of an atom with 8 protons, 7 neutrons, and 8 electrons?

15 amu

7 amu

8 amu

23 amu

17. What is the name of the CO₃^-2 ion?

Bicarbonate

Bicarboxide

Carbonate

Carbonite

18. What are the products in an acid / base reaction?

Hydrogen gas and water

Hydronium ions and hydroxide ions

A salt and water

19. Horizontal rows of elements are called ______; Vertical columns of elements are called _______.

Periods, columns

Periods, trends

Periods, groups

Groups, periods

20. Propane, C₃H_8 (g), burns in oxygen to form carbon dioxide and water. Which equation correctly shows this reaction? a. C₃H₈ + O₂ → CO₂ + H₂O b. C₃H₈ + 5O₂ → 3CO₂ + 4H₂O c. C₃H₈ + 5O₂ → CO₂ + 4H₂O d. 2C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

A

B

C

D

21. Which of the following has six valence electrons?

Beryllium

Carbon

Oxygen

Neon

22. Propane, C3H8(g), burns in oxygen to form carbon dioxide and water. Which equation correctly shows this reaction? a. C₃H₈ + O₂ → CO₂ + H₂O b. C₃H₈ + 5O₂ → 3CO2 + 4H₂O c. C₃H₈ + 5O₂ → CO2 + 4H₂O d. 2C₃H₈ + 5O₂ → 3CO2 + 4H₂O

A

B

C

D

23. What are the small units that make up polymers called?

Monomers

Plastics

Isomers

Proteins

24. When iron is exposed to air and moisture, it corrodes or rusts. Examine the equation below for the formation of hydrated iron (III) oxide: __Fe + __O₂ + __H₂O → __Fe₂O₃+ 3H₂O How many molecules of water are contained in the product?

2

3

6

1

25. LAB / What volume of water must be added to 250ml of 7M HCl to produce 5M HCl? (Hint: M₁V₁ = M₂V₂)

100 ml

1000 ml

350 ml

250 ml

26. What can a polar molecule dissolve?

Any solute

A nonpolar solute

A polar solute

No solute

27. LAB / What volume of water must be added to 250ml of 7M HCl to produce 5M HCl? (Hint: M₁V₁ = M₂V₂)

100 ml

1000 ml

350 ml

250 ml

28. Write the name of the compound CCl₄

Carbon Tetrachlorate

Carbon Chloride

Carbonic Acid

Carbon Tetrachloride

29. Write the name of the compound H₂SO₄

Hydrogen Sulfide

Sulfurous Hydride

Sulfuric Acid

DiHydrogen TetraSulfate

30. LAB / Cr₂O₃ + 2Al → Al₂O₃ + 2Cr Chromium is produced by reacting chromium oxide with aluminum as shown in the above reaction. If 92.0 grams of Cr₂O₃ and 37.0 g of Al react completely to form 71.0 g of Al₂O₃, how many grams of Cr are produced?

37.0 g

58.0 g

129.0

104 g

31. What is the formula for Sodium Hydroxide? a. Na(OH)₂b. NaHO c. NaH d. NaOH e. none of the above

A

B

C

D

E

32. Using only the periodic table, list the following elements according to increasing electronegativity: Ca, Cs, F, Si

F, Si, Ca, Cs

Cs, Ca, Si, F

Cs, Si, F, Ca

F, Cs, Ca, Si

33. LAB / What volume of water must be added to 250ml of 7M HCl to produce 5M HCl? (Hint: M₁V₁ = M₂V₂)

100 ml

1000 ml

350 ml

250 ml

34. What is the atomic mass of the element cadmium (Cd)?

112

64

48

96

35. What is the formula for aluminum sulfate? a. AlSO₄b. Al₂SO₄c. Al₂(SO₄)₃d. Al(SO₄)₃

A

B

C

D

36. In the electron cloud model of an atom, what accounts for most of the volume?

Electrons

Empty space

Neutrons

Protons

37. What is the correct formula for Lead IV Nitrate? A. Pb₂(NO₃)₂B. Pb₂(NO₃)₃C. Pb(NO₃)₂D. Pb₄(NO₃)₂

A

B

C

D

38. H₂SO₄ + KOH → K₂SO₄ + H₂O Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag NiCl₂ + NaOH → Ni(OH)₂ + 2NaCl\ H₂ + O₂ → 2H₂O All of the equations above show what?

Reactants combining with products to produce a new substance

No chemical changes occurring

Physical changes taking place

Reactants combining to produce new substances

39. What is the name of H₂CrO₄?

Carbonic acid

Chromatic acid

Chromic acid

40. Which process results in the tremendous energy given off by the Sun?

Combustion

Nuclear decay

Nuclear fission

Nuclear fusion

41. Given the unbalanced equation ___Fe₂O₃ + ___CO → ___Fe + ___CO₂ When the equation is correctly balanced, using the smallest whole-number coefficients, what is the coefficient of CO₂? a. 1 b. 2 c. 3 d. 4

1

2

3

4