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1. Place the following compounds in order from the LOWEST to the HIGHEST melting point: SCl22a.SClb.Mg Cl

, CaO, and MgCl.

--> MgCl-->  CaO

2 --> SCl2 --> CaO

c.No correct order is found.

d.Mg Cl2 --> CaO --> SCl

e.SCl2  --> CaO --> MgCl2


2. ABC and XYZ are elements. Metal ABC crystalizes into  FCC  (face center cubic) structure, and Metal XYZ crystalizes into  BCC (body center cubic)  structure. If the radius of ABC atoms is the same as the radius of XYZ atoms, we can conclude that the edge length of the cubic unit cell of ABC metal should be _________ the edge length of the cubic unit cell of XYZ metal.


a.greater than

b.less than

c.More information is needed to answer this question.

d.equal to


3. Assuming ideal behavior, which of the following aqueous solutions should have the HIGHEST boiling point?



a. 1.00 m LiBr (strong electrolyte)


b. 0.75 m NaCl (strong electrolyte)


c. 0.50 m Ca(NO3)(strong electrolyte)

d. 1.25 m C6H12O(non-electrolyte)


e. 0.75 m K2SO(strong electrolyte)


4. Place the order from the LEAST T to MOST soluable in water for the following compounds: Butane (CH3-CH2-CH2-CH3), Butanol CH3-CH2-CH2- CH2-OH, Pentanol ( CH3-CH2-CH2-CH2- CH2-OH).


Butane  --> Pentanol --> Butanol 

Butane --> Butanol --> Pentanol  

None of the answers is correct.

Pentanol -->  Butane -->  Butanol

Pentanol --> Butanol -->  Butane  


5. Calculate the molality of methanol (CH3OH); MW = 32.0 g/mol) in a solution composed of 26.5 g of methanol and 244 g H2O.


a.0.00306

b.3.39

c.0.00339

d.None of the answers is correct.

e.3.06

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