WorksheetsStoichiometry Test: Ye grande finale of The Mole
Total questions: 60
Worksheet time: 2hrs 17mins
Name
Class
Date
1.
Predict this reaction, Ca + 2HCl --> ?
a)
4CaCl3 + H2
b)
no reaction
c)
CaH2 + Cl
d)
CaCl2 + H2
2.
Balance this equation:
___NH3 + ___O2 --> ___NO + ___H2O
___NH3 + ___O2 --> ___NO + ___H2O
a)
4NH3 + 5O2 --> 4NO + H2O
b)
It's already balanced.
c)
4NH3 + 5O2 --> 4NO + 6H2O
3.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
4.
Which of the following is an unbalanced equation?
a)
CaCO3 --> CaO + CO2
b)
PbO2 + 2H2-->2Pb + H2O
c)
2Na+ 2H2O-->2NaOH + H2
d)
CS2 + 2O2 --> CO2 + 2SO2
5.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
6.
Which of the following is evidence of a chemical reaction?
a)
fizzing
b)
water changing to ice
c)
saltwater
d)
paper being cut in half
7.
Which reaction type is the following: AgF + CaCl2 --> AgCl + CaF2
a)
Decomposition
b)
Single Replacement
c)
Synthesis
d)
Double Replacement
8.
Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
9.
Balance this equation...
HgO --> 2Hg + O2
HgO --> 2Hg + O2
a)
It is balanced
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
10.
Fill in the missing coefficient to balance the equation: Mg + ___ HCl → MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
11.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
12.
Name this compound: P4S5
a)
Tetraphosphide pentasulfide
b)
Tetraphosphorus pentasulfide
c)
Pentaphosphide tetrasulfur
d)
Pentaphosphorus tetrasulfide
13.
Name this compound: CaF2
a)
Dicalcium fluoride
b)
Calcium difluoride
c)
Calcium fluoride
d)
Calcium (II) fluoride
14.
_P4+_O2 ---> _P2O3
a)
3 P4+1 O2 ---> 2 P2O3
b)
1 P4+1 O2 ---> 2 P2O3
c)
1 P4+ 3 O2 ---> 2 P2O3
d)
1 P4+ 2 O2 ---> 3 P2O3
15.
Balance this equation, Ca + H2O --> CaO + H2
a)
Ca + 2H2O --> CaO + 2H2
b)
2Ca + H2O --> CaO + H2
c)
Its balanced as it is
d)
Cannot be balanced
16.
Balance this reaction: ____ HCN + ____ CuSO4 ---->____ H2SO4 + ____ Cu(CN)2
a)
2,1,1,2
b)
2,1,1,1
c)
1,2,2,1
d)
1,2,1,1
17.
Balance this reaction: ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF
a)
1,1,1,1
b)
1,2,1,1
c)
2,1,1,2
d)
2,1,2,1
18.
Balance this equation, Al2O3 ---> Al + O2
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2
c)
2Al2O3 ---> 4Al + 3O2
d)
3Al2O3 ---> 2Al + O2
19.
Balance this equation: H2 + N2 → NH3
a)
H2 + 4N2 → NH3
b)
H2 + 3N2 → 2NH3
c)
3H2 + N2 → 2NH3
d)
2H2 + 2N2 → 2NH3
20.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
21.
The best definition for a mole provided below is
a)
The SI unit for the mass of something
b)
The SI unit for the amount of a substance
c)
The SI unit for the volume of something
d)
The SI unit for the area of a substance
22.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
23.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
24.
N2 + 3H2 --> 2NH3
What is the total number of moles of NH3 produced when 10 moles of H2 reacts completely with N2?
What is the total number of moles of NH3 produced when 10 moles of H2 reacts completely with N2?
a)
6.7
b)
2.0
c)
3.0
d)
15.0
25.
2Na + S -->Na2S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?
a)
1
b)
2
c)
0.5
d)
4
26.
6CO2 + 6H2O --> C6H12O6 + 6O2
What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
a)
2.5
b)
6
c)
12
d)
15
27.
What is the molar mass of B2(CO3)3?
a)
81.6 g/mol
b)
94.8 g/mol
c)
38.8 g/mol
d)
201.6 g/mol
28.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
29.
How many grams are there is 1.35 x 1025 atoms of K2SO4?
a)
3,909 g K2SO4
b)
174.1g K2SO4
c)
3.53 x 1021 g K2SO4
d)
423 g K2SO4
30.
How many grams are in 1.2 x 1024 molecules of CO?
a)
28 grams
b)
56 grams
c)
6.02 grams
d)
1.2 grams
31.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1304 x 1024
d)
8.638 x 10-24
32.
What is the difference between a formula unit and a molecule?
a)
formula unit - ionic bond
molecule - covalent bond
molecule - covalent bond
b)
formula unit - big
molecule - small
molecule - small
c)
formula unit - covalent bond
molecule - ionic bond
molecule - ionic bond
d)
formula unit - small
molecule - big
molecule - big
33.
What do you call a 10th grader named Avogadro taking chemistry?
a)
Soph-o-MOLE
b)
Chemistry = the most fun class eva
c)
Hank
d)
Alice
34.
Which of the following has a larger volume at STP: a mole of CO2 or a mole of H2O?
a)
CO2 has more
b)
H2O has more
c)
They have the same
d)
Impossible to compare
35.
Which of the following has a greater mass a mole of CO2 or a mole of H2O?
a)
CO2 has more
b)
H2O has more
c)
They have the same
d)
Impossible to compare
36.
Which of the following has more molecules a mole of CO2 or a mole of H2O?
a)
CO2 has more
b)
H2O has more
c)
They have the same
d)
Impossible to compare
37.
What is the mass of one mole of aluminum chloride?
a)
62.43g
b)
116.40g
c)
133.33g
d)
97.89g
38.
How many grams are in 3.62 mol of dicarbon tetroxide?
a)
88.0 g
b)
3.62 g
c)
319 g
d)
159 g
39.
Find the percent composition of hydrogen in (NH4)2S.
a)
11.85%
b)
6.30%
c)
47.1%
d)
1.01%
40.
A container with a volume of 893 L contains how many moles of air at STP?
a)
20003.2 mol
b)
39.9 mol
c)
22.4 mol
d)
none of the choices
41.
A formula with the lowest whole # ratio of elements in a compound is called
a)
empirical formula
b)
chemical formula
c)
covalent formula
d)
molecular formula
42.
A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________
a)
ionic formula
b)
covalent formula
c)
empirical formula
d)
molecular formula
43.
A compound is 25.9 % nitrogen and 74.1% oxygen. Find its empirical formula.
a)
N2O4
b)
NO
c)
N2O5
d)
N4O6
44.
The empirical formula of a substance is CH2O. Its molar mass is 180.0. What is the molecular formula?
a)
C6H12O6
b)
C4H8O4
c)
C8H16O8
d)
C2H4O2
45.
2NaClO3 (s) → 2NaCl (s) + 3O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2?
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
46.
Cl2 + 2KBr → Br2 + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
47.
Fe2O3 + 3H2 → 2Fe + 3H2O
About how many grams of H2O will be produced from 150 grams of Fe2O3?
About how many grams of H2O will be produced from 150 grams of Fe2O3?
a)
50 grams H2O
b)
60 grams H2O
c)
5000 grams H2O
d)
6000 grams H2O
48.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
49.
2H2 + O2 → 2H2O
How many moles of water can be produced if 8 moles H2 are used?
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
50.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 3 moles of Fe2O3?
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 3 moles of Fe2O3?
a)
6 moles Fe
b)
4 moles Fe
c)
2 moles Fe
d)
1 moles Fe
51.
4 Al + 3 O2 –> 2 Al2O3 How much aluminum would be needed to completely react with 45 grams of O2?
a)
1.05 moles
b)
3.75 moles
c)
0.875 grams
d)
1.875 moles
52.
What is the first thing you must do to solve a stoichiometry problem?
a)
Write a Balanced Equation
b)
Panic
c)
Write an Unbalanced Equation
d)
Avogadro's Number
53.
How many liters of NH3 would be produced from 2.00 L of N2 (assume STP)?
N2 (g) + 3H2 (g) -----> 2NH3 (g)
a)
2.00 L NH3
b)
3.00 L NH3
c)
4.00 L NH3
d)
5.00 L NH3
54.
Avogadro's number says that there are this many items for one mole of that item.
a)
6.022 x 1023
b)
22.41
c)
1.00
d)
None of the above.
55.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
56.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6?
What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
125.2 g O2
57.
How many liters of NH3 are needed to react completely with 30.0L of NO?
4NH3+6NO --> 5N2 + 6H2O
4NH3+6NO --> 5N2 + 6H2O
a)
5.0 L
b)
20.0 L
c)
7.5 L
d)
120.0 L
58.
2H2 + O2 → 2H2O
How many moles of water can be produced if 8 moles H2 are used?
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
59.
Name the given compound - Fe2(CO3)3
a)
iron (II) carbonate
b)
Iron (III) carbonate
c)
Iron carbonate
d)
Iron carbonate (II)
60.
All alkali metal react with water to produce hydrogen gas and the corresponding alkaline metal hydroxide. A typical reaction is that between lithium and water :
2Li(s) + 2H2O(l) →2LiOH(aq) + H2(g)
Calculate the mass of H2 gas formed when 40.0 g of Li react with water [Ar H =1.0, Li = 6.9, O =16.0]
2Li(s) + 2H2O(l) →2LiOH(aq) + H2(g)
Calculate the mass of H2 gas formed when 40.0 g of Li react with water [Ar H =1.0, Li = 6.9, O =16.0]
a)
4.21 g
b)
7.31 g
c)
5.80 g
d)
4.42 g
100 %
