Which of the following would have the highest boiling point?
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baam
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seesaw
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shark
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thief
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25
Identify the following atom from the electron configurations. Y : 1s22s22p63s23p64s23d104p65s24d105p1
Indium
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5
For the reaction: Ag+ (aq) + Cl-(aq) <--> AgCl(s) ÎH = -127kJ/mol In which direction does the equilibrium shift as a result of adding NaCl?
to the right
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25
Identify the following atom or ion from the electron configurations. Y - : 1s22s22p63s23p64s23d104p65s24d105p6
Iodine anion
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15
Using the following thermochemical data: 2Y(s) + 6HF(g) â 2YF3(s) + 3H2(g) ÎH° = â1811.0 kJ/mol 2Y(s) + 6HCl(g) â 2YCl3(s) + 3H2(g) ÎH° = â1446.2 kJ/mol calculate ÎH° for the following reaction: YF3(s) + 3HCl(g) â YCl3(s) + 3HF(g)
182.4 kJ/mol
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20
What is the hybridization of a carbon in ethene?
sp2
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20
For the reaction 2A + 4Bâ2C + 2D, at a particular instant in time, the rate of the reaction is 0.0352 M/s. What is the rate of change of B?
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15
How many electrons in an atom can have the quantum numbers n = 3, l = 2?
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20
Which one of the following is a redox reaction? a) 2KBr(aq) + Pb(NO3 )2 (aq) â 2KNO3 (aq) + PbBr2 (s) b) 2Al(s) + 3H2SO4 (aq) â Al2 (SO4 )3 (aq) + 3H2 (g) c) CaBr2 (aq) + H2SO4 (aq) â CaSO4 (s) + 2HBr(g) d) H+ (aq) + OHâ (aq) â H2O(l)