Calculate the capacity factor of the compound identified in the following chromatogram: Non-retained compound 0.25 ○ 1.5 ○ 35 ○ 3.5 13 لليل 5 01 6 7 8 9 10 Time (min)
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- A student performed chromatography on a mixture of benzoic acid (C6H5CO₂H), acetophenone (C6H5C(O)CH3) and styrene (C6H5CHCH₂). She used alumina (Al₂O3) as the stationary phase and a 9 : 1 mixture of hexane : ethyl ethanoate as the mobile phase. Rank the order in which the compounds moved, from fastest to slowest. benzoic acid acetophenone styreneWhat is the relative average deviation in the following percent KHP values in ppt? 46.80% 47.23% 48.03%Consider the peaks for heptane (14.56 min) and p-difluorobenzene (14.77 min) in the chromatogram. The column is 30.0 m long. (a) Measure w1/2 for each peak and calculate the number of plates and the plate height for each. (b) From w1/2, compute w for each peak and find the resolution between the two peaks.
- Q1: The following are relative peak areas for chromatograms of standard solutions of methyl vinyl ketone (MVK) MVK concentration mmol/L 0.5 Relative peak area 3.76 1.5 9.16 2.5 15.03 3.5 20.42 4.5 25.33 5.5 31.97 A sample containing MVK yielded relative peak area of 21.3. Calculate the concentration of MVK in the sample.(use excel)Given the following spectrophotometric data, what is the concentration of the sample? Concentration, M Abs 0.000 (Blank) 0.021 0.100 0.193 0.250 0.322 0.350 0465 0.500 0668 0.750 0,801 1.00 0955 Sample 0.751Analysis of several plant-food preparations for potassium ion yielded the following data: Sample Percent K+1 6.02, 6.04, 5.88, 6.06, 5.822 5.29, 5.13, 5.14, 5.28, 5.20 The preparations were randomly drawn from the same population.(a) Find the mean and standard deviation s , variance , andCV for each sample.
- Three students did a chromatography experiment, where Rf = distance of solute / distance of solvent. What could be the possible errors why student 3 had results that are quite far from that of students A and B?Suppose a difference in changes in plasma oxytocin levels between two groups of 0.2 pg/mL would be of interest to researchers and that changes within each group have standard deviation o = 0.1 pg/mL. The power of a one-sided two-sample t-test to detect a difference in changes in oxytocin levels of 0.2 pg/mL between two groups of 5 women at the 5% level is(81310 - 76200) ÷ 0.00216 With Sig Figs
- Describe with illustrations the observed peak for a chromatogram with the following tailing factors (TF): a. TF = 1b. TF > 1c. TF < 1A student was performing paper chromatography and let the separation continue overnight. Thestudent wished to determine if the mixture contained a substance with an Rf factor of 0.343 where:Rf = (distance travelled by the component)/(distance travelled by the solvent)a) What data would be affected by this error?b) Explain the effect on the calculated Rf.Chromatography involves the separation of two or more compounds/ions caused by their molecular interactions with two phases. True False