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Lujan Test 3 Balancing Chemical Equation, Conservation Of Matter, Naming Compounds
Test Description: Test 3
Instructions: Answer all questions to get your test result.
1) What coefficients are needed to balance the following equation: __H2 + __O2 = __H2O
A
2, 2, 2
B
2, 1, 2
C
1, 2, 1
D
1, 1, 1
2) How many atoms does the compound, K2MnO7 contain?
A
11
B
10
C
1
D
14
3) Chemical equations illustrate
A
Law of Conservation of Energy
B
Law of Conservation of Matter
C
chemical reactions
D
all of the above
4) What coefficients will balance the following equation: __Na + __O2 = __Na2O
A
4, 1, 2
B
none of the above
C
1, 2, 4
D
1, 4, 2
5) Fe + Cl2 -- FeCl3, what coefficients would balance the equation?
A
3, 2, 2
B
4, 2, 2
C
1, 1, 1
D
2, 3, 2
6) How many oxygens are in 2(NO3)
A
3
B
1
C
6
D
2
7) How many aluminums are in 2Al2O3
A
6
B
8
C
2
D
4
8) What is a coefficient in a chemical equation?
A
the subscript after an atomic symbol
B
a number following an elemental or molecular symbol
C
a subscript before an atomic symbol
D
a number preceding an elemental or molecular symbol
9) MgO
A
Magnesium Oxide
B
Monomanganese monoxide
C
Manganese Oxide
D
Magnesium monoxide
10) CaSO4
A
calcium hydrogen sulfate
B
Calcium sulfite
C
Calcium monosulfur tetraoxide
D
Calcium sulfate
11) FeCl3
A
Iron (III) Chloride
B
Iron trichloride
C
Iron chloride
D
monoiron trichloride
12) K2O
A
potassium oxide
B
Potassium oxalate
C
Potassium monoxide
D
dipotassium monoxide
13) CO2
A
carbide oxide
B
monocarbon dioxide
C
carbon dioxide
D
carbon oxide
14) Sodium nitrite is
A
Na3N
B
NaNO2
C
NaNO
D
NaNO3
15) Copper (II) sulfide is
A
Cu2S2
B
Cu2S
C
CuS
D
CuS2
16) What is the correct name of CrPO4
A
Chromium (II) phosphide
B
Chromium (III) phosphite
C
Chromium (II) phosphate
D
Chromium (III) phosphate
17) The formula for calcium bromide is
A
Ca2Br2
B
CaBr2
C
Ca2Br
D
CaBr
18) If your cation is a transition metal, it should have a
A
prefix
B
roman numeral
C
subscript
D
polyatomic ion
19) What does the law of conservation of mass state?
A
The total mass of the reactions is less than the total mass of the products.
B
Mass can be created but not destroyed
C
The total mass of the reactions equals the total mass of the products.
D
The total mass of the reactants is greater than the total mass of the products.
20) Which of the following equations does NOT demonstrate the law of conservation of mass?
A
NaOH + HCl = NaCl H20
B
2K + 2Cl = 2KCl
C
2Na + Cl2 = 2NaCl
D
P4 + 5O2 = 2P4O10
*select an answer for all questions
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