Final Inorgo Exam Questions And Complete Correct Answers Graded A+.
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Module
NA 701
Institution
NA 701
Consider ionic compound, MX3, composed of generic metal M and generic gaseous halogen X.
Enthalpy of formation of MX3 =-701kJ/mol
enthalpy of sublimation of M= 177 kJ/mol
1st, 2nd, and 3rd ionization energies of M=625 kJ/mol, 1583 kJ/mol, and 2469 kJ/mol
Electron affinity of X =-315kJ/mol...
What is the ground state electron configuration for C+2? bond order? - correct answer
ground state e- config:
,(σ1s)^2 (σ1s*)^2 (σ2s)^2 (σ2s*)^2 (π2p)^3
bond order= 1.5
Bond order= (bonding e-)- (antibonding e- *)/ 2
= (7-4)/2= 3/2=1.5
classify as polar or nonpolar - correct answer Polar: SO2, SF4
Nonpolar: BCl3
Determine the point group of the molecule shown. SF6 - correct answer Oh
Sodium lauryl sulfate is used in shampoos and cleansers. The structure is shown . Which atom in sodium
lauryl sulfate has an expanded octet? In which period is the atom with the expanded octet? How many
electrons are in the valence energy level of the atom with the expanded octet? - correct answer
sulfur
period 3
12 electrons
arrange the metals according to their densities. Based on the trend where would you expect the density
of Zn to be ranked? Where is the density of Zn actually ranked? - correct answer
Most dense
Fe
Mn
Cr
V
Ti
Least dense
More dense than Fe
, Somewhere in between Ti and Fe
The radius of a single atom of a generic element X is 133 picometers (pm) and a crystal of X has a unit
cell that is body- centered cubic. Calculate the volume of the unit cell. - correct answer
2.90 x 10^-29
Determine the point group of the molecule: PF2Cl3 - correct answer D3h
Calculate the enthalpies of formation of group 1 chloride compounds from the Born-Haber cycle. -
correct answer Sublimation of Na(s)= 108
Sublimation of Rb(s)= 86
Dissociation of Cl2(g)= 244 (divide by 2 so 122)
Ionizatinon energy of Na(g)= 496
Ionization energy of Rb(g)= 403
Electron affinify of Cl(g)=-349
Lattice enthalpy of NaCl(s)=787
Lattice enthalpy of RbCl(s)=695
Enthalpy of formation of NaCl= -410 kJ/mol
Enthalpy of formation of RbCl=-433 kJ/mol
Add together.
Give the highest oxidation state for Sc - correct answer +3 (equal to its charge)
identify the packing in the unit cell of the ionic crystals shown - correct answer
cube with one gray ball inside is simple (primitive) cubic
cube with gray balls all over is it face-centered
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