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- Chemistry In an analysis of the content of carbohydrate present in a glycoprotein, the following results were found: 12.6, 11.9, 13.0, 12.7 and 12.5 g of carbohydrate per 100 g of protein. Taking into account that σ is unknown, the confidence interval for the average value at a 90% confidence level of the carbohydrate content is: Select one:to. 12.5 ± 0.4b. 12.5 ± 0.2c. 12.5 ± 0.5d. 12.5 ± 0.3In the technique of high performance liquid chromatography (HPLC) the peak area response for a particular analyte is directly proportional to concentration Analgesic tablets typically consist of aspirin and caffeine as the active ingredients, the remainder made up of inert binding material. The concentrations of aspirin and caffeine may be routinely monitored using HPLC, whereby the peak areas obtained from a solution of the tablet are compared with those obtained from standard solutions of the analytes. In an analysis to determine the concentration of caffeine in such a tablet, the following data were recorded: Solutions Analysed: Tablet Sample: Mass of tablet (dissolved in 250 cm methano): 0.523 g Caffeine Standard: Mass of caffeine (diessolved in 500 cm methanol) 0.105 g HPLC results: Solution Peak Area (catfeine) 1. Tablet Sample 325 2. Caffeine Std. 865 The concentration of caffeine in the tablet (expressed as a mass (w/wl percentage) was Oa 1.89 Ob 13.4 O 3.77 Od. 267 Oe 7.54 You…The ages of a group of 122 randomly selected adult females have a standard deviation of 18.5 years Assume that the ages of female statistics students have less variation than ages of females in the general population, so let o = 18 5 years for the sample size caloulation How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 95% confidence that the sample mean is within one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population? The required sample size is (Round up to the nearest whole number as needed)
- 5HelppppConstants I Periodic Table Part A For the following reaction studied in the gas phase (Fridgen, T. D., et al. J. Phys. Chem. A 2005, 109, 7519): Ci-+ C3H7CN → C1C3H7+ CN- Is the overall reaction exothermic or endothermic? Match the words in the left column to the appropriate blanks in the sentence on the right. the following potential energy surface was derived: [Cl–C;H;-CN]¯ Reset Help ClC;H,+ CN exothermic The overall reaction is because at a higher energy endothermic than the products are the reactants are Cl +C;H¬CN the transition state is [CIC;H,-CN] Submit Request Answer [Cl–C;H;CN] Reaction progress Part B The mechanism for the reaction, based on the potential energy diagram, There are six activation energies, one associated with each of the rate constants in the mechanism. Two of the elementary steps are barrierless, in that they have activation can be written as: energies equalling zero. Which of the six activation energies, Eal, Ea–1 Ea2 Ea-2 Ea3 Ea-3 are equal to zero? k…
- For the following data set: 18.3g, 184g 13g 15.0S Determines whether the questionable data is retained or discarded at 95% confidence. Critical Q values a. Reject b. Retain Valores críticos Número de datos 90% 95% 99% 3 0.941 0.970 0.994 0.765 0.829 0.926 0.642 0.710 0.821 56. Using dimensional analysis, show how 0.082057 Latm mol. K Significant figures note: the last digit on both values has been rounded. NOTE: 1 J = 1 N-m = 1 kg.m², and 1 Pa = 1 N m² is equal to 8.3145 or 1 kg m.s mol - KYou have the following data points which belong to a function of the form y = ae, where b can be positive or negative. ม 13.7 29.6 34.6 x 2.00 4.00 5.00 You wish to determine the value of the constant, b, and to do so you will construct a linear plot. What will you plot against what? y-axis label: x-axis label: From the values of x and y in the table above, calculate the values of the three corresponding data points. Click on the graph below, and use the "Freeform Curves" tool to plot the data. Line segments will automatically connect the points. Enter Solution. What is the numerical value of the constant, b?
- What is the difference between computational calculations based on Molecular Mechanics and Semi-empirical Models?2. As the director of a research laboratory you are paid to decide if there is a significant difference between the mean values of two sets of data obtained by two different scientists, a senior scientist and one recently hired. Use 95% CL. (t at df = 10 is 2.23) Data of Senior Scientist: xmoan = 24.66% with s = 0.06% for n = 5 Data of the New Kid: xmean = 24.55% with s = 0.10% for n = 710:31 PM Tue Oct 12 AA www-awn.aleks.com G periodic table - Goo... Favorites - YouTube... XA ALEKS - Caliyah Hel... G kno3 acid or base -... G linear programming... G write formulas for t... C Solved A. Objective Knowledge Check Question 6 Caliyah A chemistry student weighs out 0.259 g of ascorbic acid (H,C,H,O,), a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1400M NAOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Be sure your answer has the correct number of significant digits. mL x10 Privacy Center Accessibility
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