A river water sample of 25°C is contaminated with diazepam with initial concentration of 5000 ppb (or ng/L) when it secondary biodegradation rate in water, Kd = 10^1.3 (cu cm/mol-sec) at 25°C and molar mass of diazepam is 284.7g/mol. What is the half life of the diazepam in hours?
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A river water sample of 25°C is contaminated with diazepam with initial concentration of 5000 ppb (or ng/L) when it secondary biodegradation rate in water, Kd = 10^1.3 (cu cm/mol-sec) at 25°C and molar mass of diazepam is 284.7g/mol. What is the half life of the diazepam in hours?
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- 1 Ten (10) ml aqueous solutions of drug A (10% w/v) and drug B (25% w/v) are stored in two identical test tubes under identical storage conditions at 37°C for 3 months. If both drugs degrade by first-order, which drug will retain the highest percentage of initial concentration? (a) Drug A (b) Drug B (c) They will be the same.LEARNING ACTIVITY 4 The reaction 2 CIO2(aq) + 2 OH(aq) - CIO: (aq) +CIO, (aq) + H2O(1) was studied with the following results: Experiment Initial Rate (M/s) [CIO,) (M) 0.060 0.020 [OH'] (M) 0.030 0.030 0.0248 0.00276 2 3 0.020 0.090 0.00828 Calculate the rate when [CIO2] = 0.100 M and [OH] = 0.050 M.Time left 0 A mixture of 0.72 g BaCl2.2H20 (molar mass = 244.2g/mol) and 0.72 g of NagP0412H20 (molar mass = 380.2g/mol) was dissolved in water Calculate the moles of unreacted species that excess. 2Na3PO4 + 3BaCl2Ba3(PO4)2 (s) + 6NACI O a. 1.1 x 10 mol. BaCl2 O b. 1.48 x 103 mol. Na3PO4 Oc. 3.78 x 103 mol. BaCl2 O d. 5.0 x 105 mol. NazPO4 O e. 1.48 x 10 mol. BaCl2 Ni
- Calculation Tables Table 4- Logarithms [l]o (M) -log[I]o -log(rate) [H2O2]o (M) 0.0100 -log[H2O2]o 2.00 Experiment # Rate (M/s) 1 2.63 x10-6 5.58 0.0200 1.70 5.18 x 106 0.0100 0.0400 0.0600 8.01 x 10-6 1.62 x 105 0.0100 4 0.0200 0.0600 3.21 x 105 0.0400 0.0600 Table 5- Rate Constants Experiment [H2OzJo(M) [H2O2]om Initial rate k # (M/s) 2.63 x10-6 1 0.0100 0.0200 2 0.0100 0.0400 5.18 x 10-6 0.0100 0.0600 8.01 x 106 4 0.0200 0.0600 1.62 x 105 5 0.0400 0.0600 3.21 x 105 Value of m (2 significant figures): Value of n (2 significant figures): verage value of k (3 significant figures):You continue with the Arrhenius Plot with the slope of the curve to be approximately -12,500 K and the Arrhenius factor of 4.367 E10 hours^-1. What is the shelf life of the drug at 22 C? What is the shelf life at 4 C? Did your coworker achieve a century shelf life in either storage condition? Be sure to show your calculations. Arrhenius Plot In (k) -8 -10 -12 -14 -16 -18 0.0026 0.0028 0.0030 1/T 0.0032 0.003Part A Magnesium reacts with hydrochloric acid to form hydrogen gas. The data below shows how the hydrochloric acid concentration varied with time. Time (s) [HCI) (mol dm-3)1.00 0.51 10 70 0.08 20 30 40 50 60 80 0.25 0.16 0.13 0.11 0.09 0.06 a) Plot a graph of acid concentration against time. b) By drawing gradients, calculate the rate at 0, 10, 20 and 30 seconds. c) Explain why the rate changes during the reaction as it does. Part B The initial rate method was used to investigate the following reaction: 2Hzia) + 2NOLg) + 2H2Olg) + Naia) The results of some studies which were made at 775°C are shown below: [H2] / 102 mol dm [NO]/ 102 mol dm3 Rate / 10 mol dms1 2.0 2.50 4.8 2.0 1.25 1.2 2.0 5.00 19.2 1.0 1.25 0.6 4.0 2.50 9.6 Using the data shown above, answer the questions on the following page. a) What is the order of reaction with respect to Hzg)? b) What is the order of reaction to NOy? c) Write down the rate equation for this reaction. d) Calculate a value for the rate constant for…
- SMF91RREAVRRCOCAU 14 Answer the exercise indicated in the image The reaction rate was investigated as a function of the initial reactant pressures, for the reaction 2NO(g) + 2H2(g) → N2(g) + 2H,0(g) and the following results were obtained: Experiment PH, (kPa) (kPa) Speed (kPas) 53.3 40.0 0.137 2. 53.3 20.3 0.033 3 38.5 53.3 0.213 19.6 53.3 0.105 What is the rate law expression for this reaction?Run Reactants Temperature (Celsius) Initial Rate (kPa/s) 1 10 ml 3% H2O2 = 5ml 0.5M KI 23.0 0.0798 2 5ml 3% H2O2 = 5ml 0.5 M KI 23.0 0.0391 3 5ml 3% H2O2 + 10ml 0.5 M KI 23.0 0.0794 Run Initial Rate (mol/L*s) [H2O2] after mixing [I-] after mixing 1 3.24 x 10^-5 0.147 M 0.0417 M 2 1.59 x 10^-5 0.0733 M 0.417 M 3 3.23 x 10^-5 0.0733 M 0.0833 M Calculate the rate law for the reactionIdentify each of the following elementary reactions as unimolecular, bimolecular, or termolecular, and write the rate expression. Reaction Molecularity Rate expression CH3 + 0z + N2 - (a) CH30,N2 rate unimolecular bimolecular (b) НСО + 0, HO2 + CO rate = - termolecular (c) NO,C1 NO, + Cl rate = Submit Answer Try Another Version 10 item attempts remaining
- With the enzyme activity results in Table 1, without plotting a graph, determine: a) b) c) Vmax (explain) Why is the velocity v constant at [S] greater than 2 x 10° M? What is the free [E] at [S] = 2 x 102 M? Table 1 [S] (mol/L) 2 x 10-1 2 x 10-2 2 x 10-3 2 x 10-4 1,5 x 10-4 1.3 x 10-5 v (umol/min) 60.00 60.00 60.00 48.00 45.00 12.002. a) Calculate the hard-sphere (HS) collision theory rate constant ks for the reaction NO(g) + C₁₂(g) Þ NOCl(g) + HS Cl(g) at 300 K in units of dm³ mols. The collision diameters of NO and Cl₂ are 370 and 540 pm, respectively. 16.0 g/mol, and mcı Use masses of m₁ = 14.0 g/mol, mo = 35.0 g/mol. N = b) Now include the line-of-centers (LOC) energy criterion to find koc in units of dm³ mol¹ s¹ using E₁ = 84.9 kJ mol LOC LOC c) Calculate the ratio of kчs and kLoc to the experimental rate constant at 300 K given A = 3.981 10° dm³ mol¹ s and E₁ = 84.9 kJ mol¹. a -1A solution of the antibiotic, penicillin contains 300 units/mL. If it is eliminated from plasma through a first order linear process and has a half-life of 8 days in the plasma, what will be the concentration in 7 days? (5 points - Solution, 1 point - Answer)