What is the sign of the cathode for the following reaction?
Al + Cr 3+ --> Al 3+ + Cr
positive
100
True or False: A collision between the molecules which appear in the net chemical equation is required for a reaction to occur.
False
100
What are the allotropes of Carbon?
diamond, graphite, C60
100
What kind of battery is found in lap-tops?
Li-ion
200
Name the following organic molecule.
8-ethyl-3-methyl-5-phenylundecane
200
Rank the following from strongest to weakest reducing agents:
ClO2 + e- --> ClO2 - E=0.954
Co 3+ + e- --> Co 2+ E=1.82
Cd 2+ + 2e- --> Cd E=-0.4
La 3+ + 3e- --> La E=-2.37
La>Cd>ClO2 - >Co 2+
200
What is the order of A from the following data?
3
200
Which element from what group is in the following?
concrete, limestone, tooth enamel.
Ca, Group II
200
True or False: The activation energy for the forward reaction is always less than that for the reverse reaction.
False
300
Draw all of the isomers of C6H14 and name them all.
What is the potential of the following cell if all of the concentrations are 0.1 M?
2Ag 2+ + Cu --> 2Ag+ + Cu 2+
1.63 V
300
What is the half-life of a reactant A if the initial concentration is 3 M and the rate constant is 0.15 M/s?
10 sec.
300
Which element in which group is found in bleach, dry cleaning agents, and pesticides?
Cl, Group VII
300
Are alkali metals reactive in water? If so, write the balanced reaction that takes place.
Yes.
2Na + 2H2O --> 2NaOH + H2
400
Give the most important starting material(s) and the product for these processes: Haber, Claus, Ostwald, Hall.
Haber: N2 and H2 --> NH3
Claus: H2S --> S
Ostwald: NH3 --> HNO3
Hall: Al 3+ (cryolite) --> Al
400
What is the current of the following reaction if the rate of the reaction is 36 mol/hr.?
Zn 2+ + 2e- --> Zn
1930 A
400
A reaction of the form A-->B has the rate law rate=k[A]^2. What is the rate constant if the concentration goes from 6 M to 1.5 M in 5 seconds?
0.1 M-1s-1
400
What is the elemental form of Sulfur?
S8
400
In what form is Al mined as?
Bauxite
500
Give the groups that each of these gems belong to: amethyst, emerald, fool's gold, topaz, onyx.
amethyst, onyx: Group IV
fool's gold: Group VI
emerald: Group II
topaz: Group III
500
What is the oxidation state of iron if 9650 C of charge are used to make 1.4 g. of Fe(s)? The molecular weight of Fe is 56 g/mol.
4+
500
What is the initial temperature if the rate constant increases 4 fold when the temperature is increased to 400 K? The activation energy is 1.152 kJ/mol.
80 K.
500
Which group contains elements found in ATP, matches, detergents, and laughing gas?
Group V or Nitrogen Group
500
Balance the following chemical reaction in acidic solution.
Cr2O7 2-(aq) + Cl-(aq) --> Cr 3+(aq) + Cl2(g)