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Which if the following cells will produce the highest voltage? Show your work.
A. Mn I Mn^2+ II Zn^2+ I Zn
B. Zn I Zn^2+ II Ni^2+ I Ni
C. Ni I Ni^2+ II Cu^2+ I Cu
—————————— will produce the highest voltage.
Write the correct name for each of the following structures.
A. CH3CH2CH2CH2CH3
B. CH3CH = CHCH2CH3
C. CH4CH2C = CCH3
Write the correct name for each of the following structures.
A. CH3CH2CH = CHCH2CH2CH = CH2
B. CH3CH2C = CCH2CH3
if 500,000 kj of heat are released by the reaction, how grams of C12H26 must have been consumed
For the following overall cell reaction, write the oxidation and reduction half-reactions, calculate the standard cell potential, E^0cell and determine if the reaction is spontaneous or not. Show your work.
Fe^3+(aq) + Cu^+(aq) —> Fe^2+(aq) + Cu^2+(aq)
Use the IUPAC rules to name the following structures:
A. CH3
I
CH3CH2CH2CH2CHCH3
I
CH2
I
CH3
B. CH3
I
CH2CH2CH2CH2CH2CH2CH3
Draw the structure of each of the following alkanes.
A. 2,3,4 - trimethylpentane
B. 2 - methylheptane
Calculate the standard entropy values for the following reactions at 25°C.
1. N2(g) + 3H2(g) ⟶ 2NH3(g)
2. H2(g) + Cl2(g) ⟶ 2HCl(g)
3. 2CO2(g) + O2(g) ⟶ 2CO2(g)
4. 3O2(g) ⟶ 2O3(g)
5. 2NH3 (g) + CO2 (g) ⟶ NH2CONH2 (aq) H2O(l)
Question 23
25.00 cm3 of a 0.7892 mol.dm-3 solution of potassium hydroxide is transferred to an empty 350.00 cm3 volumetric flask. This flask is made up to the mark with distilled water and then shaken well. The concentration of the potassium hydroxide in this second flask is:
a. 0.01109 mol.dm-3
b. 0.05637 mol.dm-3
c. 0.7892 mol.dm-3
d. 17.74 mol.dm-3
e. None of the above.
Question 24
What is the molarity of glacial acetic acid (CH3COOH, Mr = 60.05 g/mol) at 25°C given that the density of acetic acid at that temperature is 1.049 g/mL?
a. 0.0174 M
b. 0.057 M
c. 57.2 M
d. 60.1 M
e. None of the above
Question 25
Calculate the molarity of a KF (aq) solution containing 116.2 g of KF in 3.00 L of solution?
a. 0.02585 M
b. 0.667 M
c. 38.7 M
d. 58.1 M
e. None of the above
Question 19
Suppose that a solution is prepared by mixing 25 mL (0.22 mol, 16 g) of pentane (the solute) with 45 mL (0.34 mol, 30 g) of hexane (the solvent). If the volumes add on mixing, answer questions 19-21 below.
Calculate the molality of the pentane
a. 3.1 mol/kg
b. 4.8 mol/kg
c. 7.3 mol/kg
d. 3.1 mol/L
e. 7.3 mol/L
Question 20
Calculate the molarity of the pentane?
a. 3.1 mol/kg
b. 7.3 mol/kg
c. 3.1 mol/L
d. 7.3 mol/L
e. 45.8 mol/L
Question 21
What is the mole fraction of the pentane?
a. 0.35
b. 0.39
c. 0.64
d. 39%
e. 64 %
Question 22
If I prepare a solution by adding 25 mL of 2.0 M NaOH into a 500 mL volumetric flask, and filling the flask to the mark with water, what will the final concentration of the solution be?
a. 0.05 M
b. 0.10 M
c. 0.5 M
d. 2.0 M
e. 40.0 M
