exam1fall2011f5

exam1fall2011f5 - GeneralChemistryI exam1 R.LopezdelaVega...

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exam 1 4/22/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A solution containing less than the equilibrium amount is called __________. A) an unsaturated solution B) a concentrated solution C) a dilute solution D) a saturated solution E) a supersaturated solution 1) 2) What are the units of k in a zero order reaction? A) M s B) M 2 s C) Ms D) M - 1 s - 1 E) s M 2 2) 3) Determine the solubility of CO 2 in soda water at 25°C if the pressure of CO 2 is 5.2 atm. The Henry ʹ s law constant for carbon dioxide in water at this temperature is 3.4 × 10 - 2 M/atm. A) 0.15 M B) 0.65 M C) 0.29 M D) 0.18 M E) 0.57 M 3) 4) Choose the aqueous solution below with the lowest freezing point. These are all solutions of nonvolatile solutes and you should assume ideal van ʹ t Hoff factors where applicable. A) 0.075 m NaI B) 0.075 m KNO 2 C) 0.075 m (NH 4 ) 3 PO 4 D) 0.075 m NaBrO 4 E) 0.075 m LiCN 4) 5) Determine the rate law and the value of k for the following reaction using the data provided. S 2 O 8 2 (aq) + 3 I (aq) 2 SO 4 2 (g) + I 3 (aq) [S 2 O 8 2 ] i (M) [I ] i (M) Initial Rate (M - 1 s - 1 ) 0.30 0.42 4.54 0.44 0.42 6.65 0.44 0.21 3.33 A) Rate = 120 M - 2 s - 1 [S 2 O 8 2 ] 2 [I ] B) Rate = 86 M - 2 s - 1 [S 2 O 8 2 ][I ] 2 C) Rate = 195 M - 3 s - 1 [S 2 O 8 2 ] 2 [I ] 2 D) Rate = 23 M - 1/2 s - 1 [S 2 O 8 2 ][I ] 1/2 E) Rate = 36 M - 1 s - 1 [S 2 O 8 2 ][I ] 5) 6) The first - order decay of radon has a half - life of 3.823 days. How many grams of radon decomposes after 5.55 days if the sample initially weighs 100.0 grams? A) 16.6 g
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exam1fall2011f5 - GeneralChemistryI exam1 R.LopezdelaVega...

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