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- In 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…Which of the following correlation coefficients indicates the strongest relationship between variables?Compute for the sum/difference/product/quotient, then let the final answer follow correct significant figures 1. 90.09 +23.4232 +0.23 = 2. 0.000392 0.000023897 = 3. 9.00*0.012= 4. 8594.32/23 = 5. 1.23 x 1023/ 90.239=
- Find the mean and median of each of the following sets of data. Determine the deviation from the mean for each data point within the seats and find the mean deviation for each set. Use a spreadsheet if it is convenient. (a) 0.0110 0.0104. 0.0105The percentage of an additive in gasoline was measured six times with the following results: 0.13; 0.12; 0.16; 0.17; 0.20 and 0.11%. What is the 99% confidence interval for the additive percentage?Question: Using a method for the determination of % CaO in limestone the following results were obtained for a NIST Certified Reference Sample (CRM): % Cao 50.38, 50.20, 50.31, 50.22 50.41 Five samples were obtained from a railcar of limestone. The analysis of the samples gave the following results: % CaO 55.01, 59.61, 58.82, 64.39, 62.49 a) Determine the variance due to sampling. b) If the samples taken from the railcar had a mass of 0.500 g, what mass
- The accompanying table shows the ages (in years) of 11 children and the numbers of words in their vocabulary. Complete parts (a) through (d) below. Click here to view the data table. Click here to view the table of critical values for the Pearson correlation coefficient. (a) Display the data in a s A. Vocabulary size 3000+ 2400+ 1800- 1200- 600+ 0+ • .. 0 2 4 6 8 Age (years) (b) Calculate the sample r= (Round to three decimal Data Table Age, x 1 OF ANG W SA W N 5 6 3 2 4 6 Print Vocabulary size, y 9 240 540 1100 2300 2600 650 2200 270 1300 2300 Done - X +++ ars) 3000 O D. Vocabulary size 3000+ 2400- 1800- 1200- 600- of 02468 Age (years) Q oChemistry 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 ± 0.3Evaluate the following expressions. Impose the rules for significant figures different ways for the same expression. Do you find any truncation errors? a) 99.0x(44.1-(-22.007)) b) 0.633/21.9+(3.40x0.09022)
- Please see the attached image. I am unfamiliar with the standard error of regression & I can't find it anywhere in my text.Identify and provide an explanation of the differencesbetween homogeneous and heterogeneous sampling in the context of samplingmethods.Chemistry HW need help. How to do these calculation base on the data that is given？