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Chemistry Lab Final Practice Quiz

Total questions: 45

Worksheet time: 27mins

Name
Class
Date
1.

Which of the following compound(s) is nonpolar?

a) NH3   b) H2O   c) AlF3   d) CO   e) CO2   f) CN- 

a)

AlF3 and CO2

b)

NH3 and AlF3  

c)

AlF3

d)

CO2

2.

Which of the following molecules has a linear shape?

a) H2O   b) CO2   c) CH4   d) NH3   e) SO2

a)

CH4 and SO2

b)

H2O and CO2

c)

H2O and NH3

d)

CO2

3.

Which of the following compounds has a trigonal planar geometry?

a) BF3   b) NH3   c) H2O   d) CO2   e) CH4

a)

BF3 and CO2  

b)

BF3

c)

CO2 and CH4

d)

NH3 and H2O

4.

Which of the following molecules is polar?

a) CH4   b) CO2   c) H2O   d) CCl4   e) N2

a)

CO2 and N2

b)

CH4 and CCl4

c)

CH4 and H2O

d)

H2O only

5.

A 4.95 mL volume of an unknown liquid is placed into an empty measuring cylinder giving it a total mass of 15.985g. If the mass of the measuring cylinder is 12.475g. What is the density of the unknown liquid?

a)

2.52 g/mL

b)

1.19 g/mL

c)

3.23 g/mL

d)

0.71 g/mL

6.

Which of the following is a specttator ion in the following total ionic equation?

BaCl2(aq) +FeSO4(aq) → FeCl2(aq)+BaSO4(s)

a)

BaSO4

b)

Fe2+

c)

Ba2+

d)

SO42-

7.

All below are good laboratory practices, except to

a)

Store chemicals in labeled containers

b)

Wear safety glasses at all times

c)

Dispose all chemicals down the drain

d)

Record all observations

8.

During the separation of a mixture containing NaCl, CaCO3  and Sand,  4.641 g sample was washed with distill water and dried and only 3.674 g remain. What is the percentage of NaCl in the mixture?

a)

20.8%

b)

63.9%

c)

26.3%

d)

79.2%

9.

Convert 225 nm to cm-1  ( 1 nm =1x 10-9 m, 1 cm =1 x10-2 m) 

a)

2.25 x 10-2

b)

2.25 x 104

c)

2.25 x 102

d)

4.4 x 104

10.

Determine the molecular geometry for TeO2.

a)

trigonal planar

b)

linear

c)

tetrahedral

d)

v-shaped

11.

How many moles of alum (KAl(SO4)2·12H2O ) will be produced if a student reacts 6.75 g  of aluminum with 0.35 moles of KOH and 0.76 moles of H2SO4 ? ( The molar mass of Al is 27.0g/mol)

The overall chemical reaction for the synthesis of alum is:

 2 Al(s) + 2 KOH(aq) + 4 H2SO4(aq) + 22 H2O(l) ® 3 H2(g) + 2 KAl(SO4)2·12H2O(s)

a)

0.38 moles of alum

b)

0.35 moles of alum

c)

0.25 moles of alum

d)

0.19 moles of alum

12.

What is the net ionic equation for the reaction between silver (I) nitrate and sodium chloride?

a)

Ag+ +NO3-→ AgNO3

b)

Ag+ +Cl- → AgCl

c)

Na+ +Cl- → NaCl

d)

Na+ +NO3-→ NaNO3

13.

What is the molecular geometry of ammonia ( NH3NH_3 )?

a)

Tetrahedral

b)

Trigonal pyramidal

c)

Bent

d)

Linear

14.

What is the bond angle in a molecule with a tetrahedral shape?

a)

90∘90^\circ

b)

109.5∘109.5^\circ

c)

120∘120^\circ

d)

180∘180^\circ

15.

What is the bond angle in a molecule with a trigonal bipyramidal shape?

a)

90∘90^\circ and 120∘120^\circ

b)

109.5∘109.5^\circ

c)

104.5∘104.5^\circ

d)

180∘180^\circ

16.

What is the molecular geometry of a molecule with 3 atoms attached to the central atom and no lone pairs on the central atom?

a)

Linear

b)

Trigonal planar

c)

Tetrahedral

d)

Bent

17.

What is the molecular geometry of a molecule with 4 atoms attached to the central atom and no lone pairs on the central atom?

a)

Tetrahedral

b)

Trigonal planar

c)

Linear

d)

Bent

18.

What charge will barium have when it forms an ion?

a)

56+

b)

2+

c)

2-

d)

4+

19.

Give the following reaction, which substance is oxidizing agent?

Zn +H2SO4 → ZnSO4 +H2

a)

Zn

b)

Zn2+

c)

H2SO4

d)

H2

20.

Which of the following compound(s) have lone pair electrons on the central atom?

a) NH4+  b) H2O   c) AlF3   d) CO32-   e) SO2   f) HCN 

a)

H2O and SO2

b)

H2O and AlF3

c)

H2O, AlF3 and SO2

d)

H2O only

21.

All of the following are chemical properties except:

a)

rust

b)

ductility

c)

combustion

d)

corrosion

22.

Write the chemical formula for the compound magnesium phosphate:

a)

 Mg2(PO4)3

b)

MgP

c)

Mg3P2

d)

Mg3(PO4)2 

23.

Given the following reaction, which substance is oxidized  ?

CuSO4 + Zn →  ZnSO4 +Cu

a)

zinc

b)

copper

c)

zinc (II) sulfate

d)

copper (II) sulfate

24.

The correct name for the compound MnO2 would be:

a)

Manganese(II) oxide

b)

Manganese(IV) oxide

c)

Magnesium oxide

d)

Manganese oxide

25.

A student removed his hot metal from  100oC hot boiling water  and places it into the calorimeter. After running his experiment, the following information was recorded. His calorimeter contained 19.994 g of water, the metal has a mass of 25.250 g. The initial temperature of the water was 22.3oC and the final temperature of the solution was39.4oC . Calculate the specific heat of the metal.

a)

0.800 J/gC

b)

0.934 J/gC

c)

0.531 J/gC

d)

0.333 J/gC

26.

What is the formula of a hydrated sample of copper (II) chloride, if it is found to contain  0.499g of copper (II) chloride and 0.267g of water? (the molar mass of CuCl2 and H2O  are 134.5 and 18 g/mol respectively).

a)

Cu2Cl . 4H2O

b)

CuCl2 . 2H2O

c)

CuCl2 . 4H2O

d)

CuCl2 . 3H2O

27.

How many grams of aluminum are required to produce 0.743 moles of hydrogen gas?

(The molar mass of Al is 27.0 g/mol)

2Al +6HCl → 2AlCl3 +3H2


a)

6.2 g

b)

30.0 g

c)

13.4 g

d)

20.1 g

28.

A student generated a 79.43% yield of alum. If the student collected 19.67g of alum,

calculate the theoretical yield of alum.

a)

40.43g 

b)

not enough information is given

c)

15.62 g

d)

24.76 g

29.

The reaction:  3Ca(NO3)2 +2Na3PO4 →Ca3(PO4)2 +6NaNO3  is a __________reaction.

a)

neutralization

b)

redox

c)

decomposition

d)

precipitation

30.

In an atomic spectroscopy experiment, a student plots a graph of 1/λ vs 1/ni2 and generates the following equation y = -109893x + 27442. What series is observed for the line emission of the gas?

a)

Lyman

b)

Balmer

c)

Brackett

d)

Paschen

31.

The reaction between copper and nitric acid generate nitrogen dioxide.

This reaction is done in the hood because:

a)

NO2 is corrosive only

b)

NO2 is flammable and toxic

c)

NO2 is toxic only

d)

NO2 is toxic and corrosive

32.

In an atomic spectroscopy experiment, a student generates two trendlines of

y = -92257x + 10081 and y =-106240x + 12015 from her data when plotting 1/λ  vs 1/ni2.

What is her calculated Rydberg's constant?

a)

92257

b)

106240

c)

-92257

d)

-106240

33.

Determine the electron domain geometry for XeF4.

a)

Trigonal bipyramidal

b)

Tetrahedral

c)

T-shaped

d)

Octahedral

34.

Write the balanced chemical reaction between sulfuric acid and barium chloride:

a)

H2SO4  + BaCl2 → BaSO4 + 2HCl

b)

H2S + 2BaCl → 

Ba2S + 2HCl

c)

HSO4  + BaCl → 

BaSO4 + HCl

d)

H2SO4  + BaCl2 → BaSO4 + HCl

35.

Determine the number of sigma and pi bonds in AlF3.

a)

3 sigma and 1 pi

b)

2 sigma and 2 pi

c)

3 sigma bonds

d)

2 sigma and 1 pi bond

36.

What is the bond angle in a molecule with a tetrahedral shape?

a)

90∘90^\circ

b)

109.5∘109.5^\circ

c)

120∘120^\circ

d)

180∘180^\circ

37.

What is the molecular geometry of a molecule with a steric number of 3 and no lone pairs on the central atom?

a)

Linear

b)

Trigonal planar

c)

Tetrahedral

d)

Bent

38.

A gas occupies 10.0 mL at a pressure of 760 torr. If the volume of the gas is compressed to 8.4 mL, what is the new pressure (in torr), assuming temperature and number of moles remain constant?

Use Boyle’s Law:
P1V1=P2V2

a)

780 torr

b)

905 torr

c)

950 torr

d)

850 torr

39.

Will this molecule be polar or nonpolar? H2S

a)

polar

b)

nonpolar

40.

When you have H-Cl, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

41.

If a liquid has a density of 1.5 g/mL, what volume will 75 grams of this liquid occupy?

a)

50 mL

b)

75 mL

c)

100 mL

d)

150 mL

42.

What is the density of a liquid with a mass of 500 g and a volume of 250 mL?

a)

0.2 g/mL

b)

2

c)

200 mL

d)

2 g/mL

43.

A copper penny turning greenish after a few years is an example of ...

a)

Chemical Change

b)

Physical Change

44.

How many moles of NH3 are in the reaction?

a)

6

b)

8

c)

2

d)

3

45.

A 6.80 mL volume of an unknown liquid is placed into an empty flask. The total mass is 18.65 g. If the flask itself weighs 14.20 g, what is the density of the liquid?

a)

0.7850 g/mL

b)

0.5000 g/mL

c)

0.7000 g/mL

d)

0.6544 g/mL

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