Reference no: EM13132368
1 Describe the intermolecular force that must be overcome in converting each of the following from a liquid to a gas:
A. Liquid O2
B. Mercury
C. CH3I (methyl iodide)
D. CH3CH2OH (ethanol)
2 Rank the following in order of increasing strength of intermolecular forces in the pure substances. Which do you think might exist as gasses at 25"C and 1 atm: Ne, CH2, CO, and CCl4?
3 Explain why the boiling point of H2S is lower than that of water?
4 Which of the following compounds would be expected to form intermolecular hydrogen bonds in the liquid state?
A. CH3OCH3 (dimethyl either)
B. CH4
C. HF
D. CH3CO2H (acetic acid)
E. Br2
F. CH3OH (methanol)
5 The enthalpy of vaporization of liquid mercury is 59.11 kj/mol. What quantity of heat is required to vaporize 0.500 mL of mercury at 357'C, its normal boiling point? (The density of mercury is 13.6 g/mL.)
6 Assume you seal 0.1 g of diethyl ether in an evacuated 100.-mL flask. There are no molecules of any other gas in the flask. If the flask is held at 30'C, what is the approximate gas pressure in the flask? If the flask is place in an ice bath, does additional liquid ether evaporate of does some ether condense to a liquid?
7 Rank the following substances in order of increasing strength of intermolecular forces:
A. Ar
B. CH3Oh
C. Co2
D. Cao
8. If you place 1.0 of ethanol in a room that is 3.0 m long, 2.5 wide, and 2.5 high, does all the alcohol evaporate? If some liquid remains, how much remains? The vapor pressure of ethanol at 25'C is 59 mm Hg, and the density of the liquid at this temp is 0.785 g/cm3.
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Calculate the mass of sodium iron produced
: In a reaction 8200 g of sodium reacts with 74.00 g of ferric oxide to form sodium oxide and iron metal. Calculate the mass of sodium iron produced.
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Recognizing the gain problem
: At the formation of the BD Partnership, Betty contributes land with a basis of $10,000 and a FMV of $30,000 and Dick contributes cash of $30,000. Betty and Dick share profits and losses equally. When the land is sold two years later for $50,000, B..
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What is the partial pressure of the gas
: A gas sample was collected over water at 25.3 0C. The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected?
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Required tax year-end for the partnership
: The partnership does not have a natural business year. What is the required tax year-end for the partnership (if no Sec. 444 election is made)?
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Explain the intermolecular force that must be overcome
: Describe the intermolecular force that must be overcome in converting each of the following from a liquid to a gas
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What is the ph of a solution
: What is the pH of a solution made by mixing 30.00 mL of 0.10 M acetic acid with 30.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive. Ka = 1.8 × 10-5 for CH3CO2H.
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Division and euclidean algorithm
: Assume that d=sa+tb is a linear combination of integers a and b. Find infinitely many pairs of integers ( s sub k, t sub k ) with d=s sub k a + t sub k b
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Explain and identifying organic compounds
: Identifying Organic Compounds, A colorless liquid A (C3H6O) was soluble in water and ether, and had a boiling point of 94-96 degrees Celsius. It decolorized a Br2-CH2Cl2 solution and gave a positive ceric nitrate test
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How many moles each of na+ and cl- are in saline soln
: A physiological saline solution contains 154mEq/L each of Na+ and Cl-. How many moles each of Na+ and Cl- are in 0.600L of the saline solution?
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