Worksheet 31:
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Grady
Chem177
Kingston
12/02/15
1. Which substance has the highest normal boiling point?
a. CH3Cl
b. CH3Br
c. CH3I
d. CH4
e. CH3OH
2. Again, which has the highest boiling point?
a. Ar
b. SO2
c. KCl
d. CH2Cl2
e. H2O
3. Ethane, CH3CH3, dimethyl ether, CH3OCH3, and ethyl alcohol, CH3CH2OH,
are each a liquid at -100 oC.
a. Draw the lewis structures and determine which are polar
b. Rank each in expected order of increasing vapor pressures
c. Which can exhibit Hydrogen bonding?
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4. What is the density of Ne gas in g/L at STP conditions and when the temperature
is raised from STP conditions to 1500 oC and all other conditions remain
constant?
5. According to the following equation:
2𝐴𝑙(𝑠) + 2𝑂𝐻 − (𝑎𝑞) + 2𝐻2 𝑂 → 2𝐻2 (𝑔) + 2𝐴𝑙𝑂2− (𝑎𝑞)
How many liters of H2(g) are released when 0.200 g of Al are dissolved in an
excess of OH- at 25 oC and 1.00 atm?
6. A 0.153 g sample of a gas that reacts with ozone in the atmosphere exerts a
pressure of 470.6 torr in a 50.00 mL vessel at 298K. What is the molecular
formula of the gas given its elemental composition: 9.934% C; 58.64% Cl;
31.43% F.