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Hello, I'm just stuck on finding k value here on part a. Would write out step by step how they got the k value here of 0.121 hr-1.
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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? Note: I need right answer with clear calculations.In a study of the gas phase decomposition of sulfuryl chloride at 600 KSO2Cl2(g)SO2(g) + Cl2(g)the concentration of SO2Cl2 was followed as a function of time.It was found that a graph of ln[SO2Cl2] versus time in minutes gave a straight line with a slope of -4.28×10-3 min-1 and a y-intercept of -6.95 . Based on this plot, the reaction is________. (firest, zero, or second) order in SO2Cl2 and the rate constant for the reaction is min-1.1 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.
- In a study of the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 °C CH3NC(g)CH;CN(g) the concentration of CH,NC was followed as a function of time. It was found that a graph of In[CH3NC] versus time in seconds gave a straight line with a slope of -4.77x10-3 s1 and a y-intercept of -3.86 Based on this plot, the reaction is v order in CH,NC and the rate constant for the reaction is -1 zero first second1-arr In a study of the gas phase decomposition of phosphine at 120 °C PH3(g)- →1/4 P4(g) + 3/2 H2(g) the concentration of PH3 was followed as a function of time. It was found that a graph of In[PH3] versus time in seconds gave a straight line with a slope of -2.50×10² s1 and a y-intercept of -3.24. Based on this plot, the reaction i v O order in PH, and the half life for the reaction is seconds. zero first secondDrug Concentration A pharmaceutical companyclaims that the concentration of a drug in a patient’sbloodstream will be at least 10% for 8 hours. Supposeclinical tests show that the concentration of a drug (aspercent) t hours after injection is given byC(t) = 200t/2t2 + 32During what time period is the concentration at least10%? Is the company’s claim supported by the evidence?
- Researchers working on a Lake measured the following in the anoxic bottom waters:[Fe2+] = 100 μM and [S2-] = 50 fM (femtomolar). The formation of FeS(s)Fe2+ + S2- is an important controlling reaction for the solubilityof Fe(+II) under anoxic conditions. In this lake, the temperature at the bottom is about 10°C inthe summer.a. Calculate Kideal for this reaction, ignoring non-idealities.b. Correct K for the temperature at the lake bottom.c. Is the lake water at equilibrium with FeS(s) in the aquifer? If not, given more time,would more solid dissolve or precipitate?In a study of the gas phase decomposition of sulfuryl chloride at 600 KSO2Cl2(g)SO2(g) + Cl2(g)the concentration of SO2Cl2 was followed as a function of time.It was found that a graph of ln[SO2Cl2] versus time in minutes gave a straight line with a slope of -4.34×10-3 min-1 and a y-intercept of -5.20 .Based on this plot, the reaction is _______zerofirstsecond order in SO2Cl2 and the rate constant for the reaction is min-1.(d) A 5.6 dm sample of ethene, CH2=CH2 measured at s.tp. was reacted with 0.05 mol dm acidified potassium manganate(VII). Ethylene glycol, CH2(OH)CH(OH), is formed as the only carbon containing product. The half-equation for reduction of manganate(VII) ion is shown below. Mnos + 8H* + 5e - Mn?* + 4H2O (i) Construct a half-equation for the oxidation of ethene and hence write an overall equation for the reaction between ethene and manganate(VII) ions. ...[2] (ii) Calculate the minimum volume of potassium manganate(VI) required for a complete reaction with the ethene sample. [2]
- 6. Five reaction mixtures containing equal concentrations of an enzyme are made up to the substrate concentrations [S] indicated in the table below and the initial rates of the reaction (V) are measured. The experiment is repeated with an enzyme inhibitor I present at 0.22 mM in each reaction mixture. (a) Determine Km for the substrate and K, for the inhibitor. (b) Can you say anything about the type of the inhibitor? [S], mM V (µmol/min) (no I) V (µmol/min) (+ 0.22 mM I) 0.1 28 17 0.15 36 23 0.2 43 29 0.5 65 50 0.75 74 61The Arrhenius equation shows the relationship between the rate constant k and the temperature T in kelvins and is typically written as k = Ae-E/RT where R is the gas constant (8.314 J/mol K), A is a constant called the frequency factor, and Da is the activation energy for the reaction. However, a more practical form of this equation IS In = (1-12) Ea R which is mathmatically equivalent to In Ea F (1/2 R T₂ k2 T1 where ki and k2 are the rate constants for a single reaction at two different absolute temperatures (T₁ and T₂). ▼ Part A The activation energy of a certain reaction is 42.1 kJ/mol. At 20 °C, the rate constant is 0.0150s¹. At what temperature in degrees Celsius would this reaction go twice as fast? Express your answer with the appropriate units. T₂ = Submit Part B Value k₂ = Request Answer Submit Given that the initial rate constant is 0.0150s¹ at an initial temperature of 20 °C, what would the rate constant be at a temperature of 200. °C for the same reaction described in Part…reactant: 0.400g of p-amionphenol (MW=109.1) 0.450 ml of acetic anhyride (mw= 102.1 d= 1.08 ml) product: acetaminophen mw = 151.2 Calculate the E-factor of the process (78% actual yield).