Semester 2 Final Review

Chem Catalyst

Convert 52oC to Kelvin

Answer:325 K

2.) Convert 424 Kelvin to Celsius

Answer:151 Celsius

3.) The term that describes going from gas to liquid

Answer:Condensation

4.) The term that describes going from liquid to solid

Answer:Freezing

5.) The term that describes going from liquid to gas

Answer:Evaporation

7.) Assuming temperature stays constant, what happens to the pressure of a gas when the volume decreases?

Answer:Pressure increases

8.) What is the relationship between pressure of a gas and number of particles?

Answer:Direct proportional

9.) What is the relationship between Celsius temperature of a gas and pressure?

Answer:Direct, but not proportional

10.) A balloon has a volume of 7.2 L and pressure of 2.0 atm. What will the new pressure be if the volume decreased to 5.0 L?

Answer:2.88 atm

11.) There were 4 main units we used for pressure. List them all.

Answer:Atm, mmHg, psi, kPa

12.) A gas is at 400 K with a pressure of 3.2 psi. If the temperature decreases to 200 K, what will the new pressure be?

Answer:1.6 psi

13.) As a gas is heated, what happens to the kinetic energy of the gas?

Answer:Kinetic energy increases

14.) How many oxygen atoms are represented in this formula?

Sn(C2O3)2

Answer:6 oxygen atoms

15.) How many total atoms are represented in this formula?

Sn(C2O3)2

Answer:11 total atoms

16.) If I have 1 mole of squirrels, how many squirrels would I have if I counted each one?

Answer:6.02 x 10^23

17.) How many molecules are there if I have 2 moles of H2 molecules?

Answer:12.04 x 10^23

18.) How many total atoms are there if I have 2 moles of H2

molecules?

Answer:24.08 x 10^23 atoms

19.) What is the molar mass of potassium nitrate, KNO3?

Answer:101.11 g KNO3

20.) What is the molar mass of magnesium phosphate, Mg3(PO4)2?

Answer:262.87 g

21.) How many moles of magnesium phosphate are there in 100 g of Mg3(PO4)2?

Answer:0.38 moles

22.) How many moles of potassium nitrate (KNO3) are there in 300 g of potassium nitrate?

Answer:2.967 moles

23.) If you have 0.05 moles of MgCl2, how many grams do you have?

Answer:4.76 g

24.) Classify the following reaction as a chemical or physical change, or neither.

HCl(aq) + NaHCO3(aq) NaCl(aq) + H2O(l) + CO2(g)

Answer:Chemical change

25.) What would you expect to see if you carried out the following

reaction?

NaCN (s) + HCl (aq) → NaCl (aq) + HCN (g)

Answer:Solid mixing with an aqueous solution, producing bubbles

26.) What will happen to the mass of products in this reaction?

NaCN (s) + HCl (aq) → NaCl (aq) + HCN (g)

Answer:Products weigh less, gas escapes

27.) What will happen to the mass of the products in this reaction?

AgNO3 (aq) + KCl (aq) → KNO3 (aq) + AgCl (s)

Answer:Products have same mass as reactants, no gas produced

28.) What type of reaction is this?(Combination, Decomp, Single Ex., Double Ex.)

CaCl2(aq) + 2NaOH(aq) Ca(OH)2(s) + 2NaCl(aq)

Answer:Double Exchange


CaCO3 (aq) → CaO (aq) + CO2 (g)

Answer:Decomposition


Cl2(g) + 2NaBr(s) → 2NaCl(s) + Br2(s)

Answer:Single Exchange


CO2 (g) + NaOH (aq) → NaHCO3 (aq)

Answer:Combination

32.) Which reaction below matches this verbal description?

“Liquid mercury boils to produce mercury gas”

A.) NH2Cl (g) NH2Cl (aq)

B.) H2SO4 (aq) + CaCO3 (s) CaSO4 (aq) + CO2 (g) + H2O (l)

C.) Hg (l) Hg (g)

D.) CaO (s) + H2O (l) Ca(OH)2 (s)

Answer:C.) Hg (l) Hg (g)


“A solution of sulfuric acid reacts with solid calcium carbonate to produce a solution of calcium sulfate, carbon dioxide and water.”



C.) Hg (l) Hg (g)

D.) CaO (s) + H2O (l) Ca(OH)2 (s)

Answer:B.) H2SO4 (aq) + CaCO3 (s) CaSO4

(aq) + CO2 (g) + H2O (l)


“Ammonium chloride gas is dissolved in water.”



C.) Hg (l) Hg (g)

D.) CaO (s) + H2O (l) Ca(OH)2 (s)

Answer:A.) NH2Cl (g) NH2Cl (aq)

35.) Balance the following equation:

___ Al + ___ HCl --> ___ AlCl3 + ___ H2

Answer:2 Al + 6 HCl --> 2 AlCl3 + 3 H2

36.) Balance the following equation:

___ H2 + ___ N2 ___ NH3

Answer:3 H2 + 1 N2 2 NH3

37.) What is the mole ratio between potassium and potassium oxide?

4 K (s) + 1 O2 (g) 2 K2O (s)

Answer:4 moles K = 2 moles K2O

38.) What is the mole ratio between carbon dioxide and water?

2 C6H6 + 15 O2 ---> 12 CO2 + 6 H2O

Answer:12 moles CO2 = 6 moles H2O

39.) How many moles of water will be produced if 0.45 mol of oxygen reacts according to the following equation:

2 C6H6 + 15 O2 ---> 12 CO2 + 6 H2O

Answer:0.18 moles of water

40.) How many moles of carbon dioxide will be produced if 1.24 mol of C6H6 reacts according to the following equation:

2 C6H6 + 15 O2 ---> 12 CO2 + 6 H2O

Answer:7.44 moles carbon dioxide

41.) What is the molarity of a solution of 2.6 moles of sugar in 0.6 liters of solution?

Answer:4.3 M

42.) How many moles of salt (NaCl) should you dissolve if you want to make a 250 mL solution of 3.0 M NaCl?

Answer:0.75 moles of NaCl

43.) What final volume would be needed in order to prepare a 0.70 M solution from 0.15 moles of NaNO3 (s)?

Answer:0.214 L

44.) You put some drops of an unknown solution on to chunk of calcium carbonate, CaCO3. The solution fizzes and bubbles. Is it acid, base or neutral?

Answer:Acid

45.) An unknown solution is tested with universal indicator and has a pH of 10. Is it acid, base or neutral?

Answer:Base

46.) Which of the following substances have neutral pH?

A. Ca(NO3)2 B. Mg(OH)2 C. NaClD. NaOH E. HCl F. H2SO4

Answer:A and C

47.) Which of the following substances have acidic pH?

A. Ca(NO3)2 B. Mg(OH)2 C. NaClD. NaOH E. HCl F. H2SO4

Answer:E and F

48.) Which of these substances would have the highest pH?

A. 0.01 M HClB. 0.001 M NaOHC. 0.001 M NaCl

D. 0.1 M HBrE. 0.01 M KOH

Answer:E, 0.01 M KOH

49.) Which of these substances would have the lowest pH?

A. 0.01 M HClB. 0.001 M NaOHC. 0.001 M NaCl

D. 0.1 M HBrE. 0.01 M KOH

Answer:D, 0.1 M HBr

50.) In order to neutralize hydrochloric acid, HCl, what would you add?

Answer:A base

51.) If we dilute a base like sodium hydroxide, NaOH, the pH will end up at…..

Answer:pH 7

52.) What are the products of this reaction?

H2SO4 + 2KOH -->

Answer:H2O and K2SO4


HCl + NH4OH -->

Answer:H2O and NH4Cl


NH4OH + KOH -->

Answer:No reaction

55.) An acid reacting with a base will always produce ____ and ____.

Answer:Water and a salt

56.) What is the freezing/melting point of water in Celsius and Fahrenheit?

Answer:0 Celsius

32 Fahrenheit

57.) What is the boiling point of water in Celsius and Fahrenheit?

Answer:100 Celsius

212 Fahrenheit

58.) Which stage represents the melting/freezing point?

Answer:Stage 2

59.) What phase(s) of matter are present at stage 3?

Answer:Liquid only

60.) At which stage will only gas remain?

Answer:Stage 5

61.) You have water at 43ºC. You dissolve ammonium acetate, NH4C2H4O2, in the water and find the temperature decreases to 24ºC.

What is the change in temp?Is this exo or endothermic?

Answer:-19 Celsius, endothermic

62.) Which substance requires the most energy to heat up?

A. brass = 0.09 cal/g•ºC.B. aluminum = 0.21 cal/g•ºC.C. copper = 0.12 cal/g•ºC.D. wood = 0.67 cal/g•ºC.

Answer:Wood

63.) What are the names of the seven dwarves?

Answer:Sleepy, Bashful, Happy, Grumpy,

Sneezy, Dopey, and Doc

64.) Name the first 10 elements on the periodic table without looking.

Answer:Hydrogen, Helium, Lithium, Beryllium, Boron,

Carbon, Nitrogen, Oxygen, Fluorine, Neon

65.) Name the members of the Beatles.

Answer:Paul McCartney, John Lennon, Ringo

Starr, George Harrison

67.) What was the highest recorded temperature ever in Michigan, where and when was it recorded?

Answer:112 FahrenheitMio, Michigan

July 1936

Semester 2 Final Review

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