[HL question] if you are in SL 5 marks automatically. Full marks for answer 1 guess only: Which of the following is a non-spontaneous process?
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monster
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star
Double points!
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rocket
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baam
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20
The temperature of a 2.0 g sample of aluminum increases from 25C to 30C. How many joules of heat energy were added? (Specific heat of aluminum = 0.90 J/gK)
9.0
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15
Which of the following does NOT have an enthalpy of 0 kJ/mol
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20
What is the arrangement of the bonds in diamond as shown in this structure?
tetrahedral - (4 bonds each 109.5 degrees apart)
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trap
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gold
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rocket
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lifesaver
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15
What would be the best use of graphite?
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15
In an exothermic reaction, the temperature of the surroundings increases because the molecules in the surrounding have
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20
What is the molecular geometry of the carbonate ion? What would be the angles?
trigonal planar; 120 degrees
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15
What is the chemical formula for the compound barium bromide?
BaBr2
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20
What is the electron and molecular geometry for carbon dioxide. From this data, is it polar?
Electron: linear. Molecular: linear. - It is symmetric therefor NOT POLAR
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15
Maitha claims that a single sodium ion and a single oxygen ion do not bond together to form a stable binary ionic compound. Is she correct? You must explain completely
Maitha is correct. The sum of the charges of the two ions must be zero in order for them to form a stable ionic compound.
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15
In the formation of the compound of sodium chloride
a sodium atom donates an electron to a chlorine atom
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10
Why is CHCl3 more polar than CCl4?
CCl4 is symmetric and therefore no net dipole; CHCl3 is asymmetric
