What the approximate boiling point (to the nearest 10 oC) of CCl4 at 500 torr?

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Consider the three statements beneath. Which statement(s) is(are) true?; 1. Hydration is a special case of solvation in which the solvent is h2o.; ii. The oxygen terminate of water molecules is attracted toward Ca²⁺ ions.; 3. The hydrogen finish of water molecules is attracted toward Cl^- ions.; (a) 1 only; (b) 2 only; (c) three only; (d) 1 and two only; (e) 1, 2, and 3
2.: Consider the following pairs of liquids. Which pairs are miscible?; 1. benzene, C₆H₆, and hexane, C₆H₁₂; ii. water and methanol, CH_threeOH; 3. water and hexane; (a) 1, ii only; (b) two only; (c) 1 only; (d) 1, 2, 3; (e) 2, three merely
iii.: Calculate the molality of a solution that contains 51.two g of naphthalene, C₁₀H₈, in 500 mL of carbon tetrachloride. The density of CCl₄ is ane.60 g/mL.; (a) 0.250 m; (b) 0.500 thousand; (c) 0.750 m; (d) 0.840 one thousand; (east) 1.69 g
four.: What is the molality of a solution labeled "8.6% glucose (C_sixH₁₂O₆) past weight?" (Note: If the question does not give the solvent, assume it is water.); (a) 0.26 yard; (b) 0.34 k; (c) 0.44 m; (d) 0.52 m; (e) 0.67 m
5.: Calculate the mole fraction of C_iiH₅OH in a solution that contains 46 grams of ethanol, C₂H_fiveOH, and 64 grams of methanol, CH_iiiOH.; (a) i/3; (b) 0.42; (c) one/two; (d) two/iii; (e) none of these
6.: Which ascertainment(s) reflect(due south) colligative properties?; (I) A 0.five m NaBr solution has a college vapor force per unit area than a 0.5 grand BaCl₂ solution.; (II) A 0.five thousand NaOH solution freezes at a lower temperature than pure water.; (3) Pure h2o freezes at a higher temperature than pure methanol.; (a) just I; (b) just II; (c) merely Three; (d) I and Ii; (east) I and Three
7.: The vapor pressure of pure h2o at 85^oC is 434 torr. What is the vapor pressure level at 85^oC of a solution prepared from 100 mL of water (density ane.00 yard/mL) and 150 k of diglyme, C₆H₁₄O_three, a nonvolatile substance?; (a) 361 torr; (b) 390 torr; (c) 425 torr; (d) 388 torr; (e) 317 torr
8.: The vapor pressure of a solution containing a nonvolatile solute is directly proportional to the; (a) molality of the solvent.; (b) osmotic pressure of the solute.; (c) molarity of the solvent.; (d) mole fraction of solvent.; (east) mole fraction of solute.
9.: If 4.27 grams of sucrose, C₁₂H₂₂O_xi, are dissolved in fifteen.2 grams of water, what will be the humid betoken of the resulting solution? (1000_b for water = 0.512 ^oC/m) (Note: If the Yard_f and M_b are not given on the exam, you lot can find them on the back of the examination envelope.); (a) 101.64 ^oC; (b) 100.42 ^oC; (c) 99.626 ^oC; (d) 100.73 ^oC; (e) 101.42 ^oC
10.: What are the ideal van't Hoff factors for the following compounds: Ba(OH)_ii, C₆H₁₂O_vi, M₃PO₄, HNO_iii ?; (a) one, 1, 1, 1; (b) 2, ane, two, ii; (c) three, 1, 4, ii; (d) 6, 3, 5, 5; (due east) none of the above
11.: Calculate the approximate initial boiling point (in ^oC) of a solution of 285 g of magnesium chloride in 2.0 kg of water. (Assume complete dissociation of the common salt.); (a) 103.1 ^oC; (b) 101.half-dozen ^oC; (c) 102.3 ^oC; (d) 100.8 ^oC; (e) 104.viii ^oC
12.: A solution made by dissolving ix.81 thou of a nonvolatile nonelectrolyte in 90.0 g of water boiled at 100.37 ^oC at 760 mm Hg. What is the gauge molecular weight of the substance? (For h2o, Thou_b = 0.51 ^oC/m); (a) 240 chiliad/mol; (b) 150 g/mol; (c) 79 k/mol; (d) 61 grand/mol; (e) 34 1000/mol
xiii.: What is the freezing point of an aqueous 1.00 thou NaCl solution? (K_f = ane.86 ^oC/1000) (Assume complete dissociation of the table salt.); (a) -one.86 ^oC; (b) +1.86 ^oC; (c) -3.72 ^oC; (d) -0.93 ^oC; (e) 0.0 ^oC
14.: A 17.iii mg sample of an organic chemical compound (a non-electrolyte) was ground upwards with 420 mg of camphor to form a homogeneous mixture melting at 170.0 ^oC. What is the apparent formula weight of the organic chemical compound? (K_f of camphor = 37.seven ^oC/m, m.p. of camphor = 178.4 ^oC) (Notation: This is a freezing point depression problem - note the Thousand_f of camphor - camphor is the solvent.); (a) 353 g/mol; (b) 285 thou/mol; (c) 231 1000/mol; (d) 185 g/mol; (east) 166 g/mol
15.: Calculate the osmotic force per unit area associated with 50.0 chiliad of an enzyme of molecular weight 98,000 g/mol dissolved in water to requite 2600 mL of solution at 30.0 ^oC.; (a) 0.484 torr; (b) 1.68 torr; (c) 1.96 torr; (d) two.48 torr; (e) three.71 torr
16.: A 250 mL solution containing 21.four k of a polymer in toluene had an osmotic pressure level of 0.055 atm at 27 ^oC. What is the apparent formula weight of the polymer?; (a) fifteen,000 g/mol; (b) 18,000 g/mol; (c) 26,000 g/mol; (d) 32,000 g/mol; (e) 38,000 g/mol

Answers:

1. (due east) 2. (a) 3. (b) 4. (d) 5. (a) 6. (d) 7. (a) 8. (d) 9. (b) ten. (c) 11. (c) 12. (b) thirteen. (c) xiv. (d) 15. (east) 16. (e)

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Source: https://www.chem.tamu.edu/class/fyp/mcquest/ch14.html

What the approximate boiling point (to the nearest 10 oC) of CCl4 at 500 torr?

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