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You are provided an unknown sample with the molecular formula C8H9NO
Name and draw the structure of the compound based from the NMR spec
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- In the concentration range of 1 to 100 g/mL P, phosphate suppresses the atomic absorption of Ca in a linear manner. The absorbancc levels off, however, between 100 and 300 g/mL P. Explain. How can this effect be reduced?From this mass spectroscopy, determine the molecule correspond? Masse molaire (g/mol) Abundance 70000] 60000 50000 40000 30000 20000 10000 m/z--> 0 38 50 Bromo-2,4- dinitrobenzène 75 247 g/mol 107 100 154 KSCN à 50 % 97,18 (d=1,34) (12.703 min) 170 218 246 150 200 250 Bu4NBr 322,37 g/mol 3 03:23 36382 300 350 400 2,4- dinitrophényl thiocyanate 225 g/mol 449473 5833 TITIITT 450 500 550 KBr 119 g/molAP Questions // Questions 10 - 11) A student creates four solutions with varying concentration of FeSCN2 and gathers the following data at 298 K using a spectrophotometer calibrated to 460 nm: [FESCN] Absorbance 1.1 x 10-4 M 0.076 1.6 x 10-4 M 0.112 2.2 x 104 M 0.167 2.5 x 10-4 M 0.199 On the axis below, create a Beer's Law calibration plot for [FESCN2*]. Draw a best-fit line through your data points.
- Determine the isotopic peak scheme for [ReCl]+ fragment in the mass spectrum? 185Re: %37 ; 187Re: %63; 35Cl: %76; 37Cl: %24Unrounded Rounded ε∗,L/μmol 0.0259825 0.0260 Heres the data if needed: TZ # Concentration Absorbance at 430 nmnm 1 33.6480 0.931 2 25.2360 0.757 3 16.8420 0.210 4 8.41200 0.137 5 4.20600 0.122Chemistry 58 un 5 5 498 998 ¥ a ल OOGL 0OSZ 3000 3500 Navenumbers (cm-1) Please annotate this IR and label ALL peaks
- 36 5 s > Q2/ A) ethyl propyl ether (M=88) that has the following absorption peaks in mass spectrum (m/z= 73, 59, 43,31,29) suggest fragment mechanism for this compound :Mass Spectrum 1000 - 800.0 600.0 400.0 200.0 0.000- 50.00 100.0 m/z 150.0 200.0 lamalan saldassallaalan C-H;BRO, D00 3000 2000 1000 500 HAVENUNBERIl AbundanceBelow is the mass spectrum and mass data of an unknown compound. 100 ns-Ku-0253 70 80 79 80 98 55 20- 66 25 50 75 100 125 m/z m/z Relative intensity (M + 1)* Peak 99 2.4% M" Peak 98 35.5 % 80 38.9 % 79 78.4 % 70 100 % 55 30.2 % Write the molecular formula of the unknown compound. Reative htensity
- Calculate the resolution required to resolve the following peaks; i) CH3N+ (MW = 28.0187) and N2+ (MW = 28.0061) ii) C2H4+ (MW = 28.0313) and CO+ (MW = 27.9949) iii) C3H7N3+ (MW = 85.0641) and C5H9O+ (MW = 85.0653) iv) 116Sn+ (At W = 115.90219) and 232Th2+ (At W = 232.03800)c. Upon mixing CFP-a-p34 with GFP-a-p34 and 3-p34, the fluorescence of CFP drops from 100,000 to 96,000. When CFP-a-p34 is mixed with GFP-B-p34 in the presence of 0.5M GdnHCl the fluorescence of CFP drops from 100,000 to 63,900. If the Förster radius for the donor/acceptor pair is 50Å, how far apart are the donor and acceptor in each case?7) The correct structure that corresponds to the spectroscopic data given below is [IR 2720, 1710 1 point cm*1. 1H NMR 9.80(s, 1H), 7.50(dd, J = 8,0Hz, 2Hz, 1H), 7.40(d, J = 2.0Hz, 1H), 6.90(d, J = 8.0Hz, 1H), 3.90(s, 3H), 3.80(s, 3H)] COOH OMe Me CHO OMe OMe CHO OMe OMe COOH OMe Me