General Chemistry Principles and Modern Applications 11th edition Test bank
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General Chemistry, 11e (Petrucci)
Chapter 4 Chemical Reactions
1) A formula is a
shorthand way of representing a chemical reaction.
Answer: FALSE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-1
2) In a balanced
equation, the number of atoms of each element in the products must equal to the
number of atoms of each element in the reactants.
Answer: TRUE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-1
3) (aq) indicates that
the compound is dissolved in alcohol.
Answer: FALSE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-1
4) In a chemical
equation, Δ above the yield sign means the reaction will produce heat.
Answer: FALSE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-1
5) Stoichiometric
factor relates the amounts, in moles, of any two substances involved in
chemical reaction.
Answer: TRUE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-2
6) In a solution of
alcohol and water that is 70% water, alcohol is the solvent.
Answer: FALSE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-3
7) A chemical equation
is a shorthand way of representing a chemical reaction.
Answer: TRUE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-3
8) The numbers in
front of formulas in balanced equations are called stoichiometric coefficients.
Answer: TRUE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-3
9) Molarity is defined
as moles of solute per kg of solution.
Answer: FALSE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-3
10) The reactant that
is in excess determines the amount of products formed.
Answer: FALSE
Diff: 1
Type: TF Var: 1
Reference:
Section 4-4
11) When the equation
K2S2O3 + I2 → K2S4O6 + KI is balanced with the smallest integer
coefficients, the coefficient of KI is:
1.
A) 2
2.
B) 1
3.
C) 3
4.
D) 4
5.
E) 5
Answer: A
Diff: 1
Type: MC Var: 1
Reference:
Section 4-1
12) When the equation
Fe2(C2O4)3 → FeC2O4 + CO2 is balanced with the smallest integer
coefficients, the coefficient of CO2 is:
1.
A) 1
2.
B) 2
3.
C) 4
4.
D) 3
5.
E) 5
Answer: B
Diff: 1
Type: MC Var: 1
Reference:
Section 4-1
13) When the equation
CS2 + Cl2 → CCl4 + S2Cl2 is balanced with the smallest
integer coefficients, the sum of the coefficients is:
1.
A) 5
2.
B) 6
3.
C) 4
4.
D) 3
5.
E) 7
Answer: B
Diff: 1
Type: MC Var: 1
Reference:
Section 4-1
14) What is the sum of
the coefficients when the following is balanced with the smallest integer
coefficients?
K2O + H2O → KOH
1.
A) 2
2.
B) 6
3.
C) 3
4.
D) 8
5.
E) 4
Answer: E
Diff: 1
Type: MC Var: 1
Reference:
Section 4-1
15) What is the sum of
the coefficients when the following is balanced with the smallest integer
coefficients?
Na + HCl → NaCl + H2
1. A) 7
2. B) 4
3. C) 2
4. D) 10
5. E) 9
Answer: A
Diff: 1
Type: MC Var: 1
Reference:
Section 4-1
16) What is the sum of
the coefficients in the balanced equation that represents the complete
combustion of the relatively new gasoline additive “MTBE,” for which the
molecular formula is C5H12O?
1.
A) 39
2.
B) 37
3.
C) 29
4.
D) 24
5.
E) 20
Answer: A
Diff: 2
Type: MC Var: 1
Reference:
Section 4-1
17) How many grams of
N2 are required to react with 2.30 moles of Mg in the following process?
3 Mg + N2 →
Mg3N2? (Mg = 24.3 g/mol, N = 14.0 g/mol)
21.
A) 21.5 g
22.
B) 0.767 g
23.
C) 64.4 g
24.
D) 0.027 g
25.
E) 193.2 g
Answer: A
Diff: 1
Type: MC Var: 1
Reference:
Section 4-2
18) How many moles of
H3PO4 are produced when 20.0 g of HCl are produced by the reaction
20.
A) (20.0/36.5) g
21.
B) (20.0/35.5)/5 g
22.
C) (20.0/36.5)/5 g
23.
D) (20.0/98.0) g
24.
E) (20.0/98.0)/5 g
Answer: C
Diff: 2
Type: MC Var: 1
Reference:
Section 4-2
19) For the reaction
and 7.2 g of Fe2O3 (159.8 g/mol) produce how many g of Fe (55.9
g/mol)?
2.
A) 2.5 (55.9/27.0) g
3.
B) 2.5
(55.9)(2)/(27.0)(2) g
4.
C) 7.2 (55.9)(2)/159.8
g
5.
D) 7.2 (55.9/159.8) g
6.
E) 2.5 (55.9/159.8) g
Answer: C
Diff: 2
Type: MC Var: 1
Reference:
Section 4-2
20) Which metal will
produce the most hydrogen per gram of metal?
1. A) 2 Li + 2 HCl → 2 LiCl + H2
2. B) Sn + 4 HCl → SnCl4+ 2 H2
3. C) 2 Fe + 6 HCl →2 FeCl3+ 3 H2
4. D) Mg + 2 HCl → MgCl2+ H2
5. E) 2 Cr + 6 HCl → 2 CrCl3+ 3H2
Answer: A
Diff: 2
Type: MC Var: 1
Reference:
Section 4-2
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