Download 1. Given the incomplete equation

1. Given the incomplete equation:
2N2O5(g) →
Which set of products completes and balances the
incomplete equation?
1) 2N2(g) + 3H2(g)
2) 2N2(g) + 2O2(g)
3) 4NO2(g) + O2(g)
4) 4NO(g) + SO2(g)
2. Given the reaction:
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)
What is the total number of grams of O2(g) needed to
react completely with 0.50 mole of C2H2(g)?
1) 10. g
3) 80. g
2) 40. g
4) 160 g
3. When the equation
__Al2(SO4)3 + __ZnCl2 → __AlCl3 + __ZnSO4
is correctly balanced using the smallest whole number
coefficients, the sum of the coefficients is
1) 9
3) 5
2) 8
4) 4
4. Given the balanced equation:
3Fe + 4H2O → Fe3O4 + 4H2
What is the total number of liters of H2 produced at STP
when 36.0 grams of H2O is consumed?
1) 22.4
3) 44.8
2) 33.6
4) 89.6
5. Given the reaction:
2Al + 3H2SO4 → 3H2 + Al2(SO4)3
The total number of moles of H2SO4 needed to react
completely with 5.0 moles of Al is
1) 2.5 moles
3) 7.5 moles
2) 5.0 moles
4) 9.0 moles
6. Given the reaction:
2C2H6 + 7O2 → 4CO2 + 6H2O
What is the ratio of moles of CO2 produced to moles of C
2H6 consumed?
1) 1 to 1
3) 3 to 2
2) 2 to 1
4) 7 to 2
7. Given the balanced equation:
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
At STP, what is the total number of liters of hydrogen
gas produced when 3.00 moles of hydrochloric acid
solution is completely consumed?
1) 11.2 L
3) 33.6 L
2) 22.4 L
4) 44.8 L
8. Given the reaction:
(NH4)2CO3 → 2NH3 + CO2 + H2O
What is the minimum amount of ammonium carbonate
that reacts to produce 1.0 mole of ammonia?
1) 0.25 mole
3) 17 moles
2) 0.50 mole
4) 34 moles
9. Given the reaction:
2NaOH + H2SO4 → Na2SO4 + 2H2O
What is the total number of moles of NaOH needed to
react completely with 2 moles of H2SO4?
1) 1
3) 0.5
2) 2
4) 4
10. Given the reaction:
4Na + O2 → 2Na2O
How many grams of oxygen are completely consumed in
the production of 1.00 mole of Na2O?
1) 16.0
3) 62.0
2) 32.0
4) 124
11. Given the unbalanced equation:
__Al2(SO4)3 + __Ca(OH)2 → __Al(OH)3 + __CaSO4
When the equation is completely balanced using the
smallest whole number coefficients the sum of the
coefficients is
1) 5
3) 3
2) 9
4) 4
12. When the equation
__Na(s) + __H2O(l) __NaOH(aq) + __H2(g)
is correctly balanced using smallest whole numbers, the
coefficient of the water is
1) 1
3) 3
2) 2
4) 4
13. Given the reaction:
Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2
What is the total mass of H2O produced when 32 grams
of Cu is completely consumed?
1) 9.0 g
3) 36 g
2) 18 g
4) 72 g
14. When the equation
__SiO2 + __C → __SiC + __CO
is correctly balanced using whole-number coefficients,
the sum of all the coefficients is
1) 6
3) 8
2) 7
4) 9
15. Given the unbalanced equation:
__Na + __H2O → __H2 + __NaOH
When the equation is correctly balanced using the
smallest whole-number coefficients, the coefficient for H2
O is
1) 1
3) 3
2) 2
4) 4
16. Given the reaction:
2CO + O2 → 2CO2
What is the minimum number of moles of O2 required to
produce one mole of CO2?
1) 1.0
3) 0.25
2) 2.0
4) 0.50
17. Given the reaction:
3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
The total number of grams of Cu needed to produce 1.0
mole of Cu(NO3)2 is
1) 32
3) 128
2) 64
4) 192
18. Given the reaction:
2Na + 2H2O → 2NaOH + H2
How many moles of Na are needed to produce exactly
5.6 liters of H2, measured at STP?
1) 1.0
3) 0.50
2) 2.0
4) 0.25
19. Given the unbalanced equation:
__CaSO4 + __AlCl3→Al2(SO4)3 + __CaCl2
What is the coefficient of Al2(SO4)3 when the equation is
completely balanced using the smallest whole-number
coefficients?
1) 1
3) 3
2) 2
4) 4
20. Given the unbalanced equation:
__Li + __N2 → __Li3N
When the equation is correctly balanced using smallest
whole numbers, the coefficient of the lithium is
1) 1
3) 3
2) 2
4) 6
21. Given the unbalanced equation:
__ Al(s) + __O2(g) → __Al2O3(s)
When this equation is correctly balanced using smallest
whole numbers, what is the coefficient of O2(g)?
1) 6
3) 3
2) 2
4) 4
22. Which equation is correctly balanced?
1) H2 + O2 → H2O
2) Ca + Cl2 → CaCl
3) 2H2 + O2 → 2H2O
4) Ca + C12 → Ca2Cl
23. Given the reaction:
2H2 + O2 → 2H2O
The total number of grams of O2 needed to produce 54
grams of water is
1) 36
3) 61
2) 48
4) 75
24. Given the reaction:
C3H8(g) + 5O2(g) → 4H2O(g) + 3CO2(g)
What is the total number of liters of CO2 produced when
150 liters of O2 reacts completely with C3H8?
1) 90.
3) 3.0
2) 150
4) 250
25. Given the unbalanced equation:
Al(OH)3 + H2SO4 → Al2(SO4)3 + H2O
What is the coefficient in front of the H2O when the
equation is completely balanced using the smallest whole
number coefficients?
1) 6
3) 3
2) 2
4) 4
26. Given the equation:
X + Cl2 - C2H5Cl + HCl
27.
28.
29.
30.
31.
32.
33.
34.
Which molecule is represented by X?
1) C2H4
2) C2H6
3) C3H6
4) C3H8
Given the reaction:
2CH3OH(l) + 3O2(g) →2CO2(g) + 4H2O(g)
How many liters of O2(g) are needed to produce exactly
200 liters of CO2(g)?
1) 100 L
3) 300 L
2) 200 L
4) 400 L
Given the reaction:
CH4 + 2O2 → CO2 + 2H2O
What amount of oxygen is needed to completely react
with 1 mole of CH4?
1) 2 moles
3) 2 grams
2) 2 atoms
4) 2 molecules
Given the reaction:
C3H8(g) + 5O2(g) →3CO2(g) + 4H2O(g)
What is the total volume of H2O(g) formed when 8.00
liters of C3H8(g) is completely oxidized?
1) 32.0 L
3) 8.00 L
2) 22.4 L
4) 4.00 L
Given the reaction:
2C2H6 + 7O2 → 4CO2 + 6H2O
What is the total number of moles of CO2 produced
when one mole of C2H6 is completely reacted?
1) 1
3) 3
2) 2
4) 4
Given the balanced equation:
NaOH + HCl → NaCl + H2O
What is the total number of grams of H2O produced
when 116 grams of the product, NaCl, is formed?
1) 9.0 g
3) 36 g
2) 18 g
4) 54 g
Given the reaction:
4Al + 3O2 → 2Al2O3
How many moles of Al2O3 will be formed when 27
grams of Al reacts completely with O2?
1) 1.0
3) 0.50
2) 2.0
4) 4.0
When the equation
__H2O2 → __H2O + __O2
is completely balanced, the sum of all the coefficients
will be
1) 5
3) 3
2) 8
4) 4
Given the reaction:
Ca + 2H2O → Ca(OH)2 + H2
How many moles of H2O are needed to exactly react
with 2.0 moles of Ca?
1) 1.0
3) 0.50
2) 2.0
4) 4.0
35. Given the unbalanced equation:
__C3H8(g) + __O2(g) → __H2O(g) + __CO2(g)
When the equation is completely balanced using smallest
whole numbers, the coefficient of O2 is
1) 5
3) 3
2) 2
4) 10
36. Given the reaction:
Ca + 2H2O → Ca(OH)2 + H2
How many moles of H2O are needed to react completely
with 2.0 moles of Ca?
1) 1.0 mole
3) 0.50 mole
2) 2.0 moles
4) 4.0 moles
37. Given the equation:
H2(g) + Cl2(g) → 2HCl(g)
What is the total number of moles of HCl(g) produced
when 3 moles of H2(g) is completely consumed?
1) 5 moles
3) 3 moles
2) 2 moles
4) 6 moles
38. Given the balanced equation:
Fe(s) + CuSO4(aq) - FeSO4(aq) + Cu(s)
What
total mass of iron is necessary to produce 1.00 mole of
copper?
1) 26.0 g
3) 112 g
2) 55.8 g
4) 192 g
39. Given the equation:
__FeCl2 +__Na2CO3 → __FeCO3 +__NaCl
When the equation is correctly balanced using the
smallest whole numbers, the coefficient of NaCl is
1) 6
3) 3
2) 2
4) 4
40. If an equation is balanced properly, both sides of the
equation must have the same number of
1) atoms
3) molecules
2) coefficients
4) moles of molecules
41. Which equation is correctly balanced?
1) Zn + Ag+ →Zn2+ + Ag
2) Cu + Au3+ →Cu2+ + Au
3) Al + Sn2+ →Al3+ + Sn
4) Ca + Mg2+ →Ca2+ + Mg
42. Given the reaction:
Ca(s) + 2H2O(l) →Ca(OH)2(aq) + H2(g)
When 40.1 grams of Ca(s) reacts completely with the
water, what is the total volume, at STP, of H2(g)
produced?
1) 1.00 L
3) 22.4 L
2) 2.00 L
4) 44.8 L
43. Given the reaction:
N2 + 3H2 → 2NH3
How many grams of ammonia are produced when 1.0
mole of nitrogen reacts?
1) 8.5
3) 34
2) 17
4) 68
44. Given the equation:
2 C2H2(g) + 5 O2(g) - 4 CO2(g) + 2 H2O(g)
How many moles of oxygen are required to react
completely with 1.0 mole of C2H2?
1) 2.5
3) 5.0
2) 2.0
4) 10
45. When the equation
__ Cu + __H2SO4 → __CuSO4 + __H2O + __SO2
is correctly balanced, what is the coefficient of CuSO4?
1) 1
2) 2
46. Given the reaction:
3) 3
4) 4
2H2(g) + O2(g) → 2H2O(l)
47.
48.
49.
50.
51.
What is the total number of liters of O2(g) at STP needed
to produce 6.0 × 1023 molecules of H2O(l)?
1) 11.2 L
3) 33.6 L
2) 22.4 L
4) 44.8 L
When the equation
__NH3 + __O2 → __HNO3 + __ H2O
is completely balanced using smallest whole numbers,
the coefficient of O2 would be
1) 1
3) 3
2) 2
4) 4
Given the balanced equation:
2Na + S → Na2S
What is the total number of moles of S that reacted when
4.0 moles of Na were completely consumed?
1) 1.0 mole
3) 0.5 mole
2) 2.0 moles
4) 4.0 moles
According to the reaction
H2 + Cl2 → 2HCl,
the production of 2.0 moles of HCl would require 70.
grams of Cl2 and
1) 1.0 g of H2
2) 2.0 g of H2
3) 3.0 g of H2
4) 4.0 g of H2
When the equation
__H2 + __N2 → __NH3
is completely balanced using smallest whole numbers,
the sum of all the coefficients will be
1) 6
3) 3
2) 7
4) 12
Given the unbalanced equation:
__Fe2O3 + __CO - __Fe + __CO2
When the equation is correctly balanced using the
smallest whole-number coefficients, what is the
coefficient of CO?
1) 1
3) 3
2) 2
4) 4
52. Given the reaction:
2KClO3(s) → 2KCl(s) + 3O2(g)
What is the total number of moles of KClO3(s) needed to
produce 6 moles of O2(g)?
1) 1
3) 3
2) 2
4) 4
53. Given the reaction
2KClO3→ 2KCl + 3O2
What is the total number of moles of KCl produced when
1.50 moles of KClO3 is decomposed?
1) 1.50
3) 3.00
2) 4.50
4) 0.75
54. Given the unbalanced equation:
__N2(g) + __H2(g) →_NH3(g)
When the equation is balanced using smallest wholenumber coefficients, the ratio of moles of hydrogen
consumed to moles of ammonia produced is
1) 1:3
3) 2:3
2) 3:1
4) 3:2
55. Given the reaction:
2SO2(g) + O2(g) → 2SO3(g)
What is the total number of liters of SO3 produced when
32.0 liters of SO2 reacts completely? (All measurements
are made at STP.)
1) 11.2 L
3) 40.0 L
2) 32.0 L
4) 44.8 L
56. When the equation
__ C2H4 + __ O2 → __ CO2 + __ H2O
is balanced using smallest whole numbers, what is the
coefficient of the O2?
1) 1
3) 3
2) 2
4) 4
57. Given the equation:
6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g)
What is the minimum number of liters of CO2(g),
measured at STP, needed to produce 32.0 grams of
oxygen?
1) 264 L
3) 192 L
2) 32.0 L
4) 22.4 L
58. Given the reaction:
N2(g) + 3 H2(g) ↔ 2 NH3(g)
What is the mole-to-mole ratio between nitrogen gas and
hydrogen gas?
1) 1:2
3) 2:2
2) 1:3
4) 2:3
59. Given the reaction:
2C2H6 + 7O2 → 4CO2 + 6H2O
What is the total number of moles of CO2 produced by
the complete combustion of 5.0 moles of C2H6?
1) 1.0 mole
3) 5.0 moles
2) 2.0 moles
4) 10. moles
60. Given the reaction:
4NH3 + 5O2 → 4NO + 6H2O
What is the maximum number of moles of H2O that can
be produced when 2.0 moles of NH3 are completely
reacted?
1) 1.0
3) 3.0
2) 2.0
4) 6.0
Reference Tables
Answer Key
1.
3
30.
2
2.
2
31.
3
3.
1
32.
3
4.
3
33.
1
5.
3
34.
4
6.
2
35.
1
7.
3
36.
4
8.
2
37.
4
9.
4
38.
2
10.
1
39.
2
11.
2
40.
1
12.
2
41.
4
13.
2
42.
3
14.
2
43.
3
15.
2
44.
1
16.
4
45.
1
17.
2
46.
1
18.
3
47.
2
19.
1
48.
2
20.
4
49.
2
21.
3
50.
1
22.
3
51.
3
23.
2
52.
4
24.
1
53.
1
25.
1
54.
4
26.
2
55.
2
27.
3
56.
3
28.
1
57.
4
29.
1
58.
2
Answer Key
59.
4
60.
3