CHEM1011nd Major Review

1
CHEM101-1nd Major Review

• Dr. M. A. Morsy
• Chemistry Department
• KFUPM

2
1. Perform the following mathematical operation
and express the results to the correct number of
significant figures(2.100 0.35 0.05) x
18.55/3.247

• 14.3
• 14.28
• 14.282
• 14.0
• 14

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2. A gas has a boiling point of -321 oF. What is
this temperature in Kelvin?

• 77 K
• 196 K
• 362 K
• 546 K
• 82 K

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3. A 15.9361 g solid was placed in a graduated
cylinder which contains 113.3 mL of water. The
water level was increased to 119.1 mL. What is
the density of that solid?

• 2.7 g/mL
• 2.75 g/mL
• 2.748 g/mL
• 27 g/mL
• 0.27 g/mL

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4. Which of the following is a heterogeneous
mixture?

• Soil
• Gasoline
• Silver
• NaCl salt
• Sugar/water-solution

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5. What is the name of Ag2SO3?

• Silver sulfite
• Silver(I) sulfate
• Silver sulfate
• Silver(I) huposulfite
• Silver persulfate

7
6. and have the same number of

• electrons
• protons
• neutrons
• net charge
• protons neutrons

8
7. Which of the following is a transition metal?

• Os
• Al
• Na
• U e
• Gd

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8. Which of the following pair of compounds
illustrates the Law of Multiple Proportions?

• SO2 SO3
• SO2 CO2
• CO SO3
• NO2 CO2
• NO2 SO3

10
9. A sample of atomic hydrogen weighing 1.01 g
contains the same number of atoms asI. 32.00
g of oxygen gas.II. 8.00 g of oxygen gas.III.
12.00 g of 12C.

• I and III
• II and III
• I only
• II only
• III only

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10. When a 1.50 g sample of a compound containing
only carbon and sulfur is burned, 0.87 g of CO2
and 2.53 g of SO2 are produced. Determine the
empirical formula of this compound.

• CS2
• CS
• C2S
• C2S3
• C3S2

12
If 2.00 g of NaI are produced from a mixture of
10.0 g of I2 and 10.0 g of NaOH, what is the
percent yield?3I2(s) 6NaOH(s) ? 5NaI(s)
NaIO3(s) 3H2O(l)

• 20.3
• 76.9
• 40.6
• 65.6
• 15.5

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12. Antimony (Sb) occurs naturally in two major
isotopic forms 121Sb with mass 120.9038 amu and
123Sb with mass 122.9041 amu. Determine the
percentage natural abundance of the 121Sb
isotope, if the weighted average atomic mass is
121.75 amu for antimony.

• 57.7
• 42.3
• 50.0
• 99.3
• 75.7

14
Identify the reducing agent in the following
redox reaction5Fe2 MnO4- 8H ? 5Fe3
Mn2 4H2O

• Fe2
• MnO4-
• H
• Mn2
• Fe3

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14. 25 mL of 0.60 M Mg(OH)2 are added to 25 mL of
0.40 M HCl. Calculate the molar concentration of
OH- in the resulting solution. (Assume that the
base is completely dissociated)

• 0.20 M
• 0.30 M
• 0.40 M
• 0.50 M
• 0.10 M

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15. What volume of water must be added to 15 mL
of 0.60 M H2SO4 to prepare a 0.045 M solution?

• 185 mL
• 135 mL
• 385 mL
• 385 mL
• 240 mL

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16. Given the redox reaction MnO4- I- ? MnO2
IO3-When the above equation is balanced in
basic solution, the smallest whole number
coefficient of H2O is

• 1
• 2
• 3
• 4
• 5