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H Chem Final Review

Total questions: 63

Worksheet time: 2hrs 48mins

Name
Class
Date
1.

What is the molar mass of Ca(OH)2?

a)

58.10 g/mol

b)

73.09 g/mol

c)

74.10 g/mol

d)

114.18 g/mol

2.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
3.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5 moles
4.
What is the volume of 2 moles of gas at STP?
a)
22.4 L
b)
44.8 L
c)
11.2 L
d)
2 L
5.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
6.
 Balance this equation:

__ Al + __ HCl → __ H2 + __ AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
7.

What type of reaction is this? KNO3 + AlCl3 → Al(NO3)2+ KClKNO_3\ +\ AlCl_3\ \rightarrow\ Al\left(NO_3\right)_{2_{ }}+\ KCl  

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

8.

What type of reaction is this?

C5H12 + O2 → H2O + CO2C_5H_{12}\ +\ O_2\ \rightarrow\ H_2O\ +\ CO_2  

a)

Single displacement

b)

Double displacement

c)

Combustion

d)

Synthesis

9.

What type of reaction is this?

3 H2 + N2→ 2 NH33\ H_2\ +\ N_{2_{ }}\rightarrow\ 2\ NH_3  

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Double Replacement

10.

When reacting Na with Cl2, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

11.
2NaClO3 (s) → 2NaCl (s) + 3O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
12.
N2 +  3H2 −->  2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
13.

151 grams of Al2O3 are produced. How many grams of Al was needed in the reaction? Al + O2 -------> Al2O3 balance first.

a)

79.91 g

b)

22.4 liters

c)

57.8 g

d)

142.8 g

14.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2 
d)
MgN
15.

What is the empirical formula of a substance with the molecular formula C2H4?

a)

C2H2

b)

C2H2

c)

C1H1

d)

CH2

16.

What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of magnesium?

a)

13%

b)

43%

c)

63%

d)

87%

17.
What is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
a)
24%
b)
49%
c)
51%
d)
65%
18.
What is the molarity of 4 grams of sodium chloride in 3,800 mL of solution?
a)
0.018 M
b)
0.018 mol
c)
1.052 M
d)
1.052 mol
19.
If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
a)
20.9 mol
b)
0.021 mol
c)
0.02 mol
d)
0.0209 mol
20.
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?
a)
15.9 M
b)
0.636 M
c)
0.642 M
d)
1.59 M
21.

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it, changing the new volume to 90ml?

a)

.188 M

b)

3.78 M

c)

.389 M

d)

1.76 M

22.
acid + base ₋>
a)
salt + hydrogen
b)
salt + water
c)
salt + carbon dioxide + water
d)
salt
23.

If it takes 25 mL of 0.05 M HCl to neutralize 345 mL of NaOH solution, what is the concentration of the NaOH solution?

a)

0.0036 M NaOH

b)

0.00125 M NaOH

c)

3.62 M NaOH

d)

1.25 M NaOH

24.

The specific heat of aluminum is 0.9025 J/g°C. How much heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°?

a)

451 J

b)

45.1 J

c)

400 J

25.

A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.

a)

0.46 J/goC

b)

1.654 J/goC

c)

2,567,446.875 J/goC

26.

Where on the graph is the substance freezing?

a)

A to B

b)

B to A

c)

B to C

d)

C to B

e)

C to A

27.

Where on the graph is the substance a solid?

a)

A to B

b)

B to C

c)

C to D

d)

D to E

e)

E to F

28.

If the pH of a solution is 4.0, what is the pOH?

a)

4.0

b)

10.0

c)

1.0 x 10 -4

d)

cannot be determined from the information

29.

If the [H3O+] of a solution is 1 x 10-3 M, the pH is

a)

11

b)

-3

c)

3

d)

1

30.

Oranges have a [H3O+] of 1.7 x 10-2 M. Their pOH is

a)

1.77

b)

12.23

c)

10.91

d)

3.09

31.

What is the [OH-] if the [H+] is 1.0 x 10-3M?

a)

1.0 x 10-3 M

b)

1.0 x 10-14 M

c)

6.02 x 10-23 M

d)

1.0 x 10-11 M

32.

In the following reaction, 2A + 2B --> C, ΔH=−60 kJ\Delta H=-60\ kJ  . What is the ΔH\Delta H  when 6 moles of A are reacted?

a)

-180 kJ

b)

-360 kJ

c)

180 kJ

d)

360 kJ

33.
The standard enthalpy changes of combustion of carbon, hydrogen and methane are shown in the table. 
 Which one of the following expressions gives the correct value for the standard enthalpy change of formation of methane in kJ mol–1?
C(s) + 2H2(g) → CH4(g) 
a)
394 + (2 × 286) – 891 
b)
–394 – (2 × 286) + 891 
c)
394 + 286 – 891 
d)
–394 – 286 + 891 
34.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Adding SO2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase rate of reaction

d)

have no change

35.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Increasing the temperature will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

36.

2SO2(g) + O2(g) ⇌ 2SO3(g) + Heat


Removing O2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

37.

2SO2(g) + O2(g) ⇌ 2SO3(g) + Heat


Using a catalyst

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase the rate of reaction

d)

have no change

38.

At what time (in seconds) is equilibrium established?

a)

0 seconds

b)

1 second

c)

5 seconds

d)

2 seconds

39.
N2O4(g) ↔ 2 NO2(g)
What is the concentration equilibrium constant expression?
a)
Kc = [NO2]2/[N2O4]
b)
Kc = [N2O4]/[NO2]2
c)
Kc = [N2O4]2/[NO2]
d)
Kc = [NO2]/[N2O4]2
40.

What is the reaction/equation for this Kc expression

a)

2N2 + O2 ⇌ 2NO

b)

N2 + O2 ⇌ NO

c)

NO ⇌ 2NO

d)

N2 + O2 ⇌ 2NO

41.

What is the oxidation number on the nitrogen in NO?

a)

0

b)

-1

c)

-2

d)

+2

42.

Find the oxidation number of S in S2O4 2-

a)

+3

b)

+6

c)

-6

d)

-3

e)

-4

43.
Which of the following half reactions correctly represents a reduction half reaction?
a)
Fe →Fe2+ + 2e-
b)
Pb4+ + 2e- →Pb2+
c)
2O-2 →O2 + 4e-
d)
Fe + 3e- →Fe3+
44.
     In the reaction Zn + H2O --> ZnO2 + H2
 which element, if any, is oxidized? 
a)
Zinc
b)
Hydrogen
c)
Oxygen
d)
None
45.

Which element was reduced in the reaction below?

Na + PbCl2 → Pb + NaCl

a)

Na

b)

Pb

c)

Cl

d)

No element was reduced

46.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
47.

What is this element?

1s22s22p63s23p64s23d104p6

a)

Argon

b)

Krypton

c)

Selenium

d)

Bromide

48.
How many valence electrons does Chlorine have?
a)
5
b)
2
c)
7
d)
5
49.
How many Protons does Chlorine have?
a)
17
b)
35
c)
18
d)
39
50.

A bar of copper has a mass of 216g and a volume of 24 cm3. What is the density of copper?

a)

9g/cm3

b)

5184g/cm3

c)

.11g/cm3

d)

322mL

51.

What functional group is shown?

a)

halide

b)

hydroxyl

c)

amino

d)

carboxyl

52.
Classify the functional group present in the molecule. 
a)
carbonyl
b)
carboxyl
c)
phosphate
d)
hydroxyl
53.

What geometry will this molecule have?

a)

pyramidal

b)

tetrahedral

c)

trigonal planar

d)

bent

54.

What geometry will this molecule have?

a)

bent

b)

tetrahedral

c)

linear

d)

pyramidal

55.
When Pressure increases then the Volume must...
a)
Increase
b)
decrease
56.

What will happen to the volume of a balloon if you warm it up into over hot water?

a)

Volume will increase

b)

Volume will decrease

c)

Volume will not change

57.

Conducts electricity in solid form.

a)

ionic compounds

b)

covalent compounds

c)

metallic compounds

58.

Forms a "sea" of electrons.

a)

ionic

b)

covalent

c)

metallic

59.

CAN conduct electricity when dissolved in water

a)

ionic

b)

covalent

c)

metallic

60.

The number 0.0069 has...

a)

2 sigfigs

b)

4 sigfigs

c)

5 sigfigs

d)

1 sigfig

61.

The number of SigFigs in the answer of the following: 12.34 x 567

a)

3

b)

4

c)

3.5

d)

7

62.

The name of FeCl₂ is

a)

iron chloride

b)

iron (II) chloride

c)

iron (I) chloride

d)

iron dichloride

63.

What is the name of the compound Na2(SO4)?

a)

Sodium sulfate

b)

Sodium sulfide

c)

Sodium sulfite

d)

Sodium sulfuroxide

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