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- The enthalpy of combustion of hard coal averages −35 kJ/g, that of gasoline, 1.28 × 105 kJ/gal. How many kilograms of hard coal provide the same amount of heat as is available from 1.0 gallon of gasoline? Assume that thedensity of gasoline is 0.692 g/mL (the same as the density of isooctane).Five identical biood samples were analyzed to deterttmine cholesterol level in a patient The feilwing values were ohtained 157, 154, 155, 152, 155. Calculate the standand enor of the mean (SEM) fo thee dataAbout what thermometer reading (in degrees Celsius) do you expect as you approach the end of the fractional distillation of a 1:1 ethyl acetate-toluene mixture? 100 110 125 82
- fill in the volumes required to make the various dilutions of Coomassie Blue and their respective concentrations. show sample calculations.Regarding the reasoning for the Michaelis-Menten equation to be unsuitable for accurate analysis of experimental data, select all that apply: It is nonlinear It is only valid for reactions at equilibrium It is not valid under experimental conditions Extrapolation to Vm is inaccurate and therefore Km also cannot be accurately describedThe concentration of alcohol 1CH3CH2OH2 in blood, calledthe “blood alcohol concentration” or BAC, is given in unitsof grams of alcohol per 100 mL of blood. The legal definitionof intoxication, in many states of the United States, is that theBAC is 0.08 or higher. What is the concentration of alcohol,in terms of molarity, in blood if the BAC is 0.08?
- A mixture containing only KCl and NaBr is analyzed by the Mohr Method. A 0.3172-g sample is dissolved in 50 mL water and titrated to the Ag2CrO4 endpoint, requiring 36.85 mL of 0.1120 M AgNO3. A blank titration requires 0.71 mL of titrant to reach the same endpoint. Report the % (w/w) KCl and NaBr in the sample. [Ans . 84.41 % (w /w); 17.59 % (w /w)]Explain how acetaminopen gives such spectroscopic and chromatographic graph by interpreting the peaks that appeared in the graphs. Fig1. Mass Spectrometric Chromatogram of Acetaminophen (the two graphs) Fig2. IR Spectrograph of AcetaminophenFor the TylenolTM dose, calculate how much (in mg) did Erthy consume for all six doses. To do that, you will need the following information: Mrs. AB used a 100 mL bottle of TyelnolTM (concentration is 160 mg per 5 mL) and followed the package instructions (1.5 tsp per dose for a child weighing 16 – 21.9 kg).
- One complication examining a cadaver for BAC is that the decomposition process can produce alcohol. Postmortem alcohol production is usually less than 70 mg/dL, but it can be as high as 100 mg/dL. Would it be possible to mistakenly report that a sober victim had been legally drunk at the time of death? Assume that the legal BAC level is 0.08 g/dL.Table of caffeine standards concentration Sample Conc, ppm Std1 16 Std2 32 Std3 48 Std4 64 Std5 80 If the volume used to make 100 mL of std 1 is 2 uL what is the concentration in M used to make a standard calibration curve? The standards are going to be used to build calibration curve to analyze caffeine in an energy drink. If 500 mL of the energy drink has target of 400 mg caffeine, how will you prepare the sample if you need 10 mL for the analysis ? . Caffeine MM=194.19 g/mol.A clinical technician finds that the activity of a sodium-24 sample is 1088 cpm. What will be the activity of the sample 90. h later if the half-life of sodium-24 is 15 h?