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Stoichiometry Review LPHS
Test Description: Questions including, mole review, stoichiometry and limiting reactants.
Instructions: Answer all questions to get your test result.
1) Using the balanced equation 3 HCl + 1 Al(OH)3 -- 3 H2O + 1 AlCl3, how many molecules of hydrochloric acid will react with 12.5 grams of aluminum hydroxide?
A
0.48 molecules HCl
B
5.13x10^23 molecules HCl
C
2.89x10^23 molecules HCl
D
3.22x10^22 molecules HCl
2) What is the molar mass of Na2SiO3?
A
122.04 g Na2SiO3 = 1 mole Na2SiO3
B
178.23 g Na2SiO3 = 1 mole Na2SiO3
C
99.07 g Na2SiO3 = 1 mole Na2SiO3
D
67.06 g Na2SiO3 = 1 mole Na2SiO3
3) The chemical that is used up first in a chemical reaction is known as ...
A
restricting reactant
B
limiting reactant
C
surplus reactant
D
excess reactant
4) Usingthe following balanced equation, 1 Fe3O4 + 4 CO -- 3 Fe + 4 CO2, how many moles of iron will be produced when 6 moles of carbon monoxide are reacted with Fe3O4?
A
6.0 moles Fe
B
1.5 moles Fe
C
8.0 moles Fe
D
4.5 moles Fe
5) To solve problems in the stoichiometry unit, we use a method called ...
A
geometry
B
dimensional analysis
C
cross multiplication
D
guess check
6) What are the coefficients when the following equation is balanced? Mg + H3PO4 --- Mg3(PO4)2 + H2
A
3, 2, 1, 3
B
6, 4, 1, 6
C
4, 3, 2, 3
D
6, 4, 1, 6
7) What is the limiting reagent when 65 grams of iron and 130 grams of chlorine gas react? 2 Fe + 3 Cl2 -- 2 FeCl3
A
Fe
B
FeCl3
C
Cl2
D
Cl
8) What is the mass of 7.29x10^24 molecules of iodine gas?
A
3073.4 g iodine gas
B
1536.7 g iodine gas
C
3373.2 g iodine gas
D
1736.8 g iodine gas
9) How many grams of iron (III) chloride is produced when 24 g iron and 37g chlorine gas react? 2 Fe + 3 Cl2 -- 2 FeCl3
A
84.6 g FeCl3
B
54.9 g FeCl3
C
56.4 g FeCl3
D
69.7 g FeCl3
10) If 3.4 g Copper react with silver nitrate, how many moles of silver will be produced? 1 Cu + 2 AgNO3 --- 1 Cu(NO3)2 + 2 Ag
A
13.4 moles Ag
B
11.54 moles Ag
C
0.11 mole Ag
D
0.054 moles Ag
*select an answer for all questions
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