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WorksheetsPreAP Semester Exam Review
Total questions: 30
Worksheet time: 45mins
Name
Class
Date
1.
Which of the following is an intensive property?
a)
number of moles
b)
mass in grams
c)
density
d)
volume in liters
2.
What is the difference between a mixture and a compound?
a)
Mixtures can be separated by chemical processes, but compounds cannot.
b)
Mixtures are made of at least two different elements, but compounds require at least three different elements.
c)
Mixtures can be separated by physical processes, and compounds can be broken down by chemical processes.
d)
Compounds are homogeneous and so mixtures are heterogeneous.
3.
Italian Salad Dressing is an example of a(n)
a)
heterogeneous mixture
b)
homogeneous mixture
c)
pure substance
d)
solution
4.
Which of the following is NOT an indication of a chemical change?
a)
Change in color
b)
Formation of a precipitate
c)
Melting
d)
Change in temperature
5.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
6.
A rock weighing 36.5g is placed in a graduated cylinder. What is the density of Object X?
a)
0.406 cm3
b)
0.56 g/mL
c)
0.685 g/mL
d)
1.46 g/mL
7.
When multiplying 2.2 mm and 5.00 mm the correct number of significant figures is...? When adding 2.2 mm and 5.00 mm the correct number of significant figures is....?
a)
3, 3
b)
3, 2
c)
2 , 3
d)
2, 2
8.
JJ Thomson's experiment with the cathode ray tube led to the discovery of a negatively charged subatomic particle known as the __________.
a)
Neutron
b)
Electron
c)
Proton
d)
Nucleus
9.
Which statement is true about oxygen-17 and oxygen-18?
a)
They do not have the same number of protons.
b)
Their atoms have different number of electrons.
c)
They are isotopes of oxygen.
d)
The have the same mass number.
10.
Wavelength and Frequency are...
a)
directly related
b)
inversely proportional
c)
no correlation
d)
confusing
11.
Calculate the wavelength of light with a frequency of 3.95 x 1014 Hz. in meters, m.
a)
1.2x1023
b)
7.6x10-7
c)
7.6x107
d)
1.2x10-23
12.
Ionic compounds
a)
have high melting points.
b)
are brittle.
c)
are good conductors in their liquid state.
d)
all the choices are correct.
13.
FeSO3
a)
iron (I) sulfate
b)
iron sulfite
c)
iron (III) sulfite
d)
iron (II) sulfite
14.
P2O5
a)
phosphorus oxide
b)
phosphorus (II) oxide
c)
diphosphorus pentoxide
d)
phosphorus pentoxide
15.
chromium (III) nitrate
a)
Cr3N2
b)
Cr2N
c)
Cr2NO3
d)
Cr(NO3)3
16.
Which of the following has six valence electrons?
a)
Sodium
b)
Iodine
c)
Oxygen
d)
Carbon
17.
As atoms of elements in group 16 are considered in order from top to bottom, the electronegativity of each successive element....
a)
decreases
b)
increases
c)
remains the same
d)
none of the above
18.
When oxygen becomes an ion, it _____ electrons and becomes _____ in size.
a)
gains, smaller
b)
gains, larger
c)
loses, smaller
d)
loses, larger
19.
Which of the following families is the least electronegative?
a)
noble gases
b)
Halogens
c)
transition metals
d)
alkali metals
20.
What is this element?
1s22s22p63s23p64s23d104p65s24d10
1s22s22p63s23p64s23d104p65s24d10
a)
Zinc
b)
Cadmium
c)
Nickel
d)
Germanium
21.
A salt shaker filled with 17.0 g sodium chloride contains
a)
17.0 mol NaCl.
b)
5.85 mol NaCl.
c)
3.52 x 1020 mol NaCl
d)
0.291 mol NaCl
22.
How many moles of barium nitrate, Ba(NO3)2, contain 6.8 x 1024 formula units?
a)
6.02 x 1023 formula units
b)
11 moles
c)
11 formula units
d)
11 g
23.
The empirical formula for a compound that contains 36 g C, 8.0 g O, and 6.0 g H is
a)
C4H6O
b)
C6H12O
c)
C9H2O4
d)
C6H12O6
24.
When the equation Al + Br2 -> AlBr3 is balanced, the coefficient for Al is:
a)
1.
b)
2.
c)
3.
d)
4.
25.
Mg + 2HCl -> MgCl2 + H2 is a
a)
synthesis reaction.
b)
single replacement reaction.
c)
decomposition reaction.
d)
double replacement reaction.
26.
Which of these lists contains only soluble substances?
a)
sodium nitrate, potassium chloride, calcium carbonate
b)
lead nitrate, lead chloride, lead sulfate
c)
calcium nitrate, copper chloride, ammonium phosphate
d)
silver nitrate, barium sulfate, copper carbonate
27.
In the reaction
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
a)
Reduced
b)
Synthesized
c)
Oxidized
d)
None of the above
28.
The equation for the synthesis of ammonia is N2 + 3H2 -> 2NH3. How many moles of hydrogen are needed to produce 6 moles of ammonia?
a)
4
b)
6
c)
8
d)
9
29.
What mass of copper is produced when 3.80 g of iron reacts with excess copper (II) sulfate?
2Fe + 3CuSO4 −> 3Cu + Fe2(SO4)3
2Fe + 3CuSO4 −> 3Cu + Fe2(SO4)3
a)
6.48 g
b)
5.01 g
c)
3.3 g
d)
2.88 g
30.
If 16.4 g sodium chromate are combined with 26.2 g silver nitrate in a double replacement reaction, what will be the limiting reactant?
Na2CrO4 + 2AgNO3 −> 2NaNO3 + Ag2CrO4
Na2CrO4 + 2AgNO3 −> 2NaNO3 + Ag2CrO4
a)
sodium chromate
b)
silver nitrate
c)
sodium nitrate
d)
silver chromate
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