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Worksheetschemistry final review
Total questions: 50
Worksheet time: 31mins
Name
Class
Date
1.
An atom of an element with atomic number 8 and mass number 17 contains which of the following combinations of subatomic particles?
a)
9 electrons, 8 protons, 8 neutrons
b)
17 neutrons, 8 protons, 8 electrons
c)
9 protons, 9 neutrons, 8 electrons
d)
8 protons, 8 electrons, 9 neutrons
2.
How do isotopes C-12 and C-14 differ from one another?
a)
C-14 has 2 more protons
b)
C-14 has 2 more neutrons
c)
C-14 has 2 more electrons
d)
C-14 has 14 protons
3.
Which of the following particle(s) is found inside the nucleus?
a)
protons and neutrons
b)
protons and electrons
c)
neutrons and electrons
d)
electrons only
4.
How many valence electrons are found in a Ba atom?
a)
2
b)
1
c)
4
d)
6
5.
Which is true of Rutherford’s Gold Foil experiment?
a)
atoms are mainly empty space
b)
nucleus has almost all the mass of the atom
c)
nucleus only occupy very small part of the atom
d)
all of the options
6.
Which of the following is a polar molecule?
a)
H2
b)
O2
c)
H2O
d)
NaCl
7.
What is the percent by mass of Calcium in Calcium oxide?
a)
71%
b)
17%
c)
40%
d)
47%
8.
Which of the following is an example of an organic compound?
a)
C2H6
b)
CO2
c)
O3
d)
Na2CO3
9.
Which is an example of a solution?
a)
sugar water
b)
muddy water
c)
orange juice
d)
milk
10.
More organic compounds exist than inorganic compounds because
a)
carbon has four valence electrons
b)
carbon can form long chains
c)
carbon is a metalloid
d)
carbon is very inreactive
11.
A pH of 2 indicates a solution would have
a)
more OH- ions than H+ ions
b)
less OH- ions than H+ ions
c)
equal number of OH- and H+ ions
d)
no OH- or H+ ions
12.
If a solution turns litmus paper red, which of the following must be present?
a)
acid
b)
base
c)
soap
d)
salt
13.
What describes the difference between a gas at 373 K and a solid at 373 K?
a)
solid has more energy
b)
gas has more energy
c)
gas is more ionic
d)
solid is more ionic
14.
What type of bond would be formed between Lithium and oxygen?
a)
covalent
b)
ionic
c)
metallic
d)
dispersion
15.
Which bond has the lowest polarity?
a)
H2
b)
HBr
c)
H2O
d)
HF
16.
Which of the following elements is a noble gas?
a)
N2
b)
O2
c)
H2
d)
Ar
17.
Which of the following is a property of metals?
a)
dull
b)
brittle
c)
good electrical and thermal conductor
d)
none of the options
18.
Which is the correct Lewis Structure for Na2O?
a)
..
H:O:H
..
H:O:H
..
b)
Na:O:Na
c)
Na:O::Na
d)
Na::O::Na
19.
A nonmetal with the smallest radius would be found in what period?
a)
1
b)
7
c)
2
d)
3
20.
Which atom would require the most amount of energy to lose an electron?
a)
Rn
b)
Fr
c)
He
d)
B
21.
When Calcium reacts with HCl, the gas that would be produced is?
a)
H2
b)
Cl
c)
H
d)
Cl2
22.
Which is the correct equation for the reaction between Florine gas and a solution of sodium bromide?
a)
2F (g) + NaBr (aq) → NaF (aq) + 2Br2 (g)
b)
2F (g) + 2NaBr (aq) → 2NaF (aq) + Br2 (g)
c)
F2 (g)+ 2NaBr (aq) → 2NaF (aq) + Br2 (g)
d)
F2 (g) + 2NaBr (aq) → 2NaCl (aq) + 2Br (g)
23.
What is the correct formula for Copper (I) nitride?
a)
Cu2N3
b)
Cu3N
c)
Cu3N2
d)
CuN
24.
What is the correct name for the formula Ba(NO3) 2?
a)
Barium nitride
b)
Barium dinitride
c)
Barium nitrate
d)
Barium dinitrate
25.
What is true about the following equation?
H2O2 (l) → H2O (g) + O2 (g)
H2O2 (l) → H2O (g) + O2 (g)
a)
H2O is reactant
b)
water vapor is a product
c)
oxygen gas is a reactant
d)
one of the product is in liquid state
26.
What type of reaction in represented in the following equation?
2Fr (aq) + Ba(NO3) 2 (aq) → 2FrNO3 (aq) + Ba (s)
2Fr (aq) + Ba(NO3) 2 (aq) → 2FrNO3 (aq) + Ba (s)
a)
Double Displacement
b)
Decomposition
c)
Single Displacement
d)
Synthesis
27.
The correct formula for nitric acid is?
a)
H3N
b)
HNO2
c)
HNO3
d)
HN
28.
When determining the charge of an element, the most useful information from the periodic table would be?
a)
mass number
b)
atomic number
c)
period number
d)
group number
29.
The coefficients in the correctly balanced equation below would be? Ba + N2 → Ba3N2
a)
3,1,1
b)
2,1,2
c)
3,0,0
d)
6,3,2
30.
A compound with a very high melting point and conducts electricity would be classified as what type of compound?
a)
ionic
b)
covalent
c)
metallic
d)
nonmetallic
31.
A block of Al foil reacts slower than a strip of Al foil due to?
a)
shape
b)
bonds
c)
surface area
d)
density
32.
When strong acid and strong base react, the products are?
a)
salt
b)
water
c)
salt and water
d)
pure water
33.
A substance that can form an aqueous solution that can't conducts electricity is known as an?
a)
nonelectrolyte
b)
base
c)
salt
d)
electrolyte
34.
A 6 mL sample of gas at a temperature of 100 K is cooled down to 50K. What is the resulting volume?
a)
0.8 ml
b)
3 ml
c)
1 ml
d)
2 ml
35.
A temperature of 60oC is equal to what temperature on the Kelvin scale?
a)
333 K
b)
243 K
c)
273 K
d)
303 K
36.
Which one is a heterogeneous mixture?
a)
salt water
b)
sugar water
c)
milk
d)
solution
37.
What is the molar mass of Na2O?
a)
51 g
b)
52 g/ mol
c)
62 g/ mol
d)
20 g
38.
Which of the following is an indication that a chemical change has occurred?
a)
phase change
b)
conducts electricity
c)
different shape
d)
produce light
39.
How many Mg atoms are involved in the following reaction?
MgCl2 + 2Li → Mg + 2LiCl
MgCl2 + 2Li → Mg + 2LiCl
a)
2
b)
1
c)
4
d)
8
40.
What does the Law of Conservation of Mass state?
a)
products mass > reactant mass
b)
reactant mass > product mass
c)
product mass = reactant mass
d)
products mass=reactant mass+product mass
41.
How many grams are in 2.0 moles of CO2?
a)
88 g
b)
84.006 g
c)
378 g
d)
380 g
42.
How many moles are in 90.0 grams of H2O?
a)
0.5 moles
b)
1.11 moles
c)
0.10 moles
d)
5.00 moles
43.
How many particles are in 0.050 moles of N?
a)
3.010 x1022
b)
3 x1022
c)
3.0 x1022
d)
3.01 x1022
44.
What does Avogadro’s number represent?
a)
1 mole = 6.02 x1023 particles
b)
6.02 x1023 particles = 22.4 L of any substance
c)
6.02 x1023 particles = molar mass of any substance
d)
all of the above
45.
How many grams of KCl can dissolve into 100 grams water at 50 oC?
a)
38 g
b)
50 0C
c)
42 g
d)
60 g
46.
If you spill bleach on your floor, which item you will choose to neutralize it?
a)
lemon juice
b)
white vinegar
c)
baking soda
d)
milk
47.
When a gas change into a solid directly, we call it_____________
a)
evaporation
b)
boiling
c)
sublimation
d)
deposition
48.
The label on a lotion says “pH balanced”. What does that tell you?
a)
the pH is 7
b)
the shampoo is acidic
c)
the shampoo is basic
d)
the pH is 0
49.
2H2 + O2 --> 2H2O
if 2 moles oxygen is used, how many water will be produced?
if 2 moles oxygen is used, how many water will be produced?
a)
4
b)
8
c)
2
d)
1
50.
2H2 + O2 --> 2H2O
what is the mole ratio of H2 and O2?
what is the mole ratio of H2 and O2?
a)
2:1
b)
1:1
c)
1:2
d)
2:0
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