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Chem 102 Exam 1

Ci mole fraction d mass fraction 15 the boiling point

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'C'i mole fraction d. mass fraction 15. The boiling point elevation constant for water is 0.52'C /m. At what temperature will a mixture of 58.5 g of NaCl and 1 kg of water boil? a.98.4"C b.99.2"C c) 101.0"C d. 100.0'c
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$ erura[ an[ fl.n"atyticaf fEfementaL) e fremistry I I, qa [[ 2 0 1 2 Irutructor: ,(4. Song 16. which of the following statements concerning osmosis is/are C6RRECT? i. Osmosis involves the movement of a solvent through a semipermeable membrane. ii. Solvents move from regions of high solute concentration to regions of |ower solute concentration. iii. Osmotic pressure is a colligative property. a. i only b'. i and iii c. ii and iii d. i, ii, and iii is likely to have a van't Hoff factor equal to 4? c. KCIOz d. Na:pOa 17. Which of the following electrolytes b. MgF2 18. Assume the reaction below 2No(g) + oz(e) -+ 2Noz(e) proceeds via the following rate expression: rate : k[NO]2[O2] Which of the following statements is/are CORRECT? i. The reaction is second-order with respect to NO. ii. The reaction is fi.rst-order with respect to 02. iii. According to the balanced chemical equation, the reaction is fifth-order overall. ' a. i only b. ii only c. i and ii d. ii and iii 19. Dinitrogen pentaoxide decomposes to nitrogen dioxide and oxygen according to the following balanced chemical equation and rate expression. 2N2O5(g) -+ 4NOz(g) + Oz(g) rate: k[NzOs] What is the overall reaction order? a.0 b. I c.2 d.5 20. The reaction A(g) -+ B(g) is first-order with respect to A. which of the aiCaClz ,.-i correct for this reaction? [A] tn[Al tirne b. following plot is ln[Al d 1/l^l tlrne tirne tlme a. c.
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[A] (mol/L) [B] (mol/L) was used to study the reaction below. Itutructor: W. Song d.0.175 M Initial rate mol/L.s 2.51 x 10- 1.03 x 10-2 2.07 x L0-2 0.150 0.300 0.300 25. What is the half-life ty,of the above ia.46.21seconds b. 60.00 seconds c.7.24 x 10-2 M reaction (question 24)? c.32.11 seconds $ercraf anfflna$tica[nfementat) efremistry II, lFa[[ 2012 21. The initial rates method A+38 -+2C 0.210 0.210 0.420 Determine the rate expression and calculate the rate constant for the reaction. a.
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Ci mole fraction d mass fraction 15 The boiling point...

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