Fairleigh Dickinson University General Chemistry Multiple Choice Problems

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QUESTION 1
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Calculate the amount of ZnO(s) produced during the reaction when 2410 kJ of heat were produced.
2 ZnS(s) + 3 O2(g) 2 ZnO(s) + 2 SO2(g) AH = -879 kJ
4.68 mole Zno
8.23 mole Zno
2.74 mole Zno
5.48 mole Zno
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QUESTION 2
The following equation is given:
H2(g) + 1/2O2(g) H200 AH = – 286 kJ
What is the AH for this equation? 2 H20 (1) – 2 H2 (g) + O2(g)
AH = + 572 kJ
AH = -572 k)
0 AH = + 286 kJ
AH = -286 kJ
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QUESTION 3
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A 584 g piece of solid iron is heated from 22°C to 375°C. The specific heat of Fe is 0.444]/gºC. Calculate the heat absorbed by
the iron.
464 kJ
97.2 kg
0 91.5 kJ
O 57.0 kJ
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QUESTION 4
A photon has a wavelength of 456 nm. What is the energy of this photon?
6.57 x 1015,
4.36 x 10-19)
4.36 x 10-37
6.57 x 10-19,
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QUESTION 7
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Write the ground state electron configuration for the element tin, Sn.
2s22p6 352 3p6 452 30 10 4p6 552 40 10 5p2 652
152 253 2p5 352 3p6 452 30 10 4p6 552 40 10 5p2
152 252 2p 3s 3p 452 30 10 4p6 552 4d10 5p2
152 252 2p 3s 3p 452 30 10 4p65s1 4d 10 5p3
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QUESTION 8
Arrange the following atoms in order of increasing atomic radius: Xe, Ar, Kr, He
Xe, Kr, Ar, He
He, A, E, Xe
_ An, He, Kr, Xe
Oxe, Kr, He, Ar
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QUESTION 5
How many total electrons can there be in the n=4 orbital?
20 electrons total: 452 4p64d12
18 electrons total: 452 4p64010
Gina
32 electrons total: 452 4p6 4d 10 4f14
30 electrons total: 452 4p64d10 4812
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QUESTION 6
Wh
Indicate the number of unpaired electrons in the following atom. Also indicate the number of valence electrons in the atom.
Sulfur
2 unpaired electrons, 7 valence electrons
3 unpaired electrons, 5 valence electrons
O unpaired electrons, 6 valence electrons
2 unpaired electrons, 6 valence electrons
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QUESTIONS
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For the elements listed below, which element has the highest first Ionization energy and which element has the lowest first
jonization energy?
Ca, Kr, As, K
Kr is the highest and K is the lowest
K is the highest and Kr is the lowest
Ca is the highest and As is the lowest
As is the highest and Ca is the lowest
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QUESTION 10
Which one of each of the following pairs is the smallest?
Ca or Ca2+
S or S2-
Ca and S are the smaller ones.
Ca and s2- are the smaller ones.
Ca2+ and s2- are the smaller ones.
Ca2+ and S are the smaller ones.
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