CHM 110 Final Exam Review F22 (2)
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Chem 110 F22
Dr. Pfirman
Final Exam Review Packet Name:____________________________________________________________ Section 1: Conversions 1.
Express the following numbers in proper scientific notation.
93,000,000
________________
22.47
________________
0.0000529
________________
2.
Express the following numbers in decimal form.
2.38029 x 10 2
________________
1.375 x 10 - 3
________________
1.09674 x 10 4
________________
3.
Calculate the following conversions and use the correct number of significant figures. 2.24 cm = ___________________ in
2.24 L = ___________________ mL
10.0 mol H
2
O = _________________ g H
2
O
10.0 molecules H
2
O = _______________ moles H
2
O
1
Chem 110 F22
Dr. Pfirman
2 lbs = __________ kg
1.200 x 10
5
g CO
2
= _________________ moles CO
2
0.00100 ft = _______________ in
5.00 g sulfuric acid = ___________________ molecules Sulfuric acid
2.000 atm = __________________ mm Hg = __________________ torr
32.0 moles potassium carbonate = _____________________ g potassium carbonate
Section 3: Accuracy and Precision 8. Classify the following sets of measurements as accurate, precise, both, or neither.
(a) Checking for consistency in the weight of chocolate chip cookies: 17.27 g, 13.05 g, 19.46 g, 16.92 g
(b) Testing the volume of a batch of 25-mL pipettes: 27.02 mL, 26.99 mL, 26.97 mL, 27.01 mL (c) Determining the purity of gold: 99.9999%, 99.9998%, 99.9998%, 99.9999%
2
Chem 110 F22
Dr. Pfirman
Section 4: Chemical and Physical Properties and Changes 9. Label each of the following changes as physical or chemical:
(a) condensation of steam
(b) burning of gasoline
(c) souring of milk
(d) dissolving of sugar in water
(e) melting of gold
(f) coal burning
(g) ice melting
(h) mixing chocolate syrup with milk
(i) explosion of a firecracker
(j) rusting of metal chair in the rain
Section 5: Ions, Isotopes, and Electron Configurations 12. Naturally occurring silver has two isotopes. Isotope A has a relative mass of 106.9051 and an abundance of
51.82%. Isotope B has a relative mass of 108.9047. Calculate the atomic mass of silver from these data. 3
Chem 110 F22
Dr. Pfirman
13. Use the periodic table to find the numbers of protons, neutrons, and electrons for the following atoms or ions.
Name of
Element
Element
Symbol
Mass
Number
Atomic
Number
Protons
Neutrons
Electrons
Copper
29
35
Tc
98
43
Pb
+4
207
Thallium
204
81
H
+1
0
Carbon
12
14. Cobalt–60 and iodine–131 are radioactive isotopes commonly used in nuclear medicine. How many protons, neutrons, and electrons are in atoms of these isotopes? Write the complete electron configuration for each isotope.
15. Write BOTH the expected
full electron configuration, AND the actual
full electron configuration.
a.
Cu
b.
Cr
16. Write the abbreviated electron configurations (noble gas configuration) AND state how many valence shell
electrons the atom has. a.
Mn
b.
Be
4
Chem 110 F22
Dr. Pfirman
Section 6: Periodic Trends
17. Which has the largest atomic radius in each pair?
a.
K
Ge
b.
Eu
Pm
c.
Ge
Pb
d.
Bi
Ni
18. Which has the largest ionization energy of each pair?
a.
Sn
Pb
b.
Be
B
19. Which has the highest electron affinity of each pair?
a.
F
Cl
b.
Rb
Sb
c.
Hg
Pb
Section 7: Quantum Theory and Advanced Bonding Theory
20. Write the set of quantum numbers for the 8
th
electron of O. Write out the electron configuration and
orbital-filling diagram FIRST, and circle the eighth electron to fill in the orbitals of O. 21. How many electrons fit into: a.
one orbital? b.
the p-subshell?
c.
the valence shell of a noble gas?
5
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reactant - product
If there are 4 grams of reactant, how many grams of product are produced by the chemical reaction?
es 4)
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