Phosphorus, P4, can be prepared from calcium phosphate by the reaction
The molar mass for each reactant is shown below the reactant, and the mass of each
reactant for this problem is given above. Which reactant is the limiting reagent?
A)C
B)SiO2
C)Ca3(PO4)2
D)P4
E)More information is needed.
What is the mass of 9.00 x 1022atoms of magnesium, Mg?
A)0.150 g
B)0.363 g
C)1.80 g
D)3.63 g
E)36.3 g
Consider the galvanic cell shown below (the contents of each half-cell are written
beneath each compartment):
The standard reduction potentials are as follows:
What is the value of e for this cell at 25°C?
A) 1.759 V
B) 1.823 V
C) 1.837 V
D) 1.887 V
E) 2.207 V
The rate law for a reaction is found to be Rate = k[A]2[B]. Which of the following
mechanisms gives this rate law?
A)I
B)II
C)III
D)two of these
E)none of these
The second law of thermodynamics states that:
A) The entropy of a perfect crystal is zero at 0 K.
B) The entropy of the universe is constant.
C) The energy of the universe is increasing.
D) The entropy of the universe is increasing.
E) The energy of the universe is constant.
The following data were obtained for the reaction 2A + B –> C where rate = [C]/t
What is the value of the rate constant?
A)2.13
B)0.213
C)0.426
D)1.70
E)none of these
For a certain process, at 300. K, G = -10.4kJ and H = -7.0 kJ. If the process is carried
out reversibly, the amount of useful work that can be performed is
A) -17.4 kJ
B) -7.0 kJ
C) -3.4 kJ
D) -10.4 kJ
E) 3.4 kJ
What type of reaction(s) are predominantly undergone by alkanes?
A) elimination
B) addition
C) substitution
D) reduction
E) both A and B
Describe the relationship between 1,2-dimethylcyclohexane and
1,2-dimethylcycloheptane
A) optical isomers
B) structural isomers
C) geometric isomers
D) not isomers but different compounds
E) same compound
Consider an electrochemical cell with a zinc electrode immersed in 1.0 M Zn2+ and a
nickel electrode immersed in 0.10 M Ni2+.
Calculate e at 25°C for the cell shown below, given the following data:
Kspfor AgCl = 1.6 x 10-10
A) 0.83 V
B) 0.54 V
C) 1.01 V
D) 2.98 V
E) cannot be determined from the data given
Which item (a, b or c) in each of the three groups below has the lowest entropy?
A) a, a, b
B) c, b, c
C) b, b, c
D) a, b, c
E) a, a, c
How many of the following help determine whether or not a solution forms?
I.the polarities of the solute and solvent
II.the densities of the solute and solvent
III.the probability of the mixed state (of the solution)
IV.the energies needed for the solution formation to occur
V.the state of matter of the solute (solid, liquid, gas)
A)1
B)2
C)3
D)4
E)5