Describe and explain the relationships between the variables of the Beer-Lambert law: i) When concentration is varied, how are absorbance and extinction coefficient affected? ii) How are absorbance and extinction coefficient affected when pathlength is varied? When answering each question, first state your finding, make specific references to your data in the table, then state whether the observed trends match what was expected according to the Beer-Lambert law. Be sure to describe the trends quantitatively (how much did absorbance change when c or I was varied?). Finally, explain these phenomena on a molecular level.

1.Explain out plane and Asymmetrical vibration 2.Explain the principle of operation of UV-Spectroscopy 3. Discuss 2 factors that result in deviation from Beer's law

why is a calibration curve likely to be linear over a wider range of concentrations at the wavelength of maximum absorption compared to a wavelength on a shoulder of the absorption curve?

The HNMR spectrum of acetic acid is shown below. Explain why the downfield singlet is much broader than the upfield singlet.

Please refer to the images as much as you need to. For the following hydrocarbons, pick out 5 wavenumbers for each hydrocarbon, and give it its probable assignment for its structure. You may find this link useful:    https://www.sigmaaldrich.com/US/en/technical-documents/technical-article/analytical-chemistry/photometry-and-reflectometry/ir-spectrum-table   o-xylene (cm-1) : 985.76, 1021.06, 1052.51, 1119.30, 1383.43, 1465.62, 1495.11, 1604.66, 2859.82, 2874.76, 2922.19, 2937.08, 2968.08, 3016.57, 3049.67, 3063.02, 3105.51   m-xylene (cm-1) : 876.16, 904.28, 1039.26, 1094.05, 1169.56, 1376.70, 1397.17, 1458.12, 1491.51, 1538.93, 1557.96, 1591.83, 1612.18, 1652.69, 2730.72, 2863.59, 2920.44, 2944.72, 3015.77, 3104.24   p-xylene (cm-1) :1023.01, 1042.16, 1102.92, 1119.19, 1219.51, 1378.51, 1455.91, 1515.82, 1557.92, 1631.57, 1889.80, 2732.29, 2868.22, 2921.93, 2976.07, 2999.25, 3018.79, 3044.59, 3093.20, 3133.55, 3134.26

This question pertains to vibrational spectroscopy. Which of the following molecules would have a pure vibrational spectrum and why? HCl, CO2, N2, H2O What is the selection rule for vibrational spectroscopy? The wavenumber of the fundamental vibrational transition of Cl2 is 565 cm-1. Calculate the force constant of the bond.

Point out three most important absorptions, including frequency and molecular motion, to support the IR structure of  3,5-Dimethylbenzaldehyde. The focus is on determining the substitution pattern of the benzene ring and point out the functional groups present, with one of the absorptions coming from the fingerprint area of the spectrum

Explain the basic principle of Raman spectroscopy. 2. What type of scattering and can be observed and explain the differences. 3. What does it mean by Raleigh scattering and draw the energy difference. 4. What does it mean by inelastic scattering? 5. Why does Stokes scattering has higher intensity compared to anti-stokes?

please quickly  ,within 1hour thanks ! If it takes longer than an hour, i don't need the answer (4) Please briefly compare the similarities and differences between atomic absorption spectroscopy and UV-Vis absorption spectroscopy.

The concentration of chemical solutions can be expressed in several different units of measurement (e.g. M, mM, mg/ml), and the same applies to a compound's extinction coefficient. Remember that absorbance has no units, so in the Beer-Lambert law, the units in the extinction coefficient need to cancel out those from concentration x pathlength. Pathlength is typically given in cm. You place a 4 mM solution of compound X into a 1.0 cm cuvette and measure an absorbance of 1.000. If you were to calculate an extinction coefficient of 2.5 x 10^2?, which units would you have been using? Note- two of the answers below are correct. i) uM-1cm-1 ii) M-1cm-1 iii) L/mol/cm iv) L/(mmol cm) v) L/umol/cm Assuming that compound X has a molecular weight of 370 g/mol, recalculate extinction coefficient of the solution in question (a) using each of these units: L/g/cm, ml/mg/cm, ml/ug/cm