CHEM 1E EXP 5 Spectroscopy and Beers Law Analysis_Revision_Fall18 (1)

True or false Magnetic coils reduce magnetic field when current flows through them.   Most NMR machines can detect excitement from different types of atom.   NMR is a spectroscopic technique to observe local magnetic fields around atomic proton.   A 12C NMR can only see activity from carbon atoms.   NMR signal is produced by the inactivation of the nuclei sample with radio waves into nuclear magnetic resonance, which is detected with sensitive radio receivers.

Group the electronic configurations of neutral elements in sets according to those you would expect to show similar chemical properties. 15²2s²2p²38²3p³ 1s²2s²2p³: Set A 1s²2s²2p 3s²3p: 15²25²2p% 15² 3400 4p/5 1s²2s22p 3s23p648²3d¹04p6: 1s²2s²2p638²3p³: Answer Bank Determine the chemical symbols for the neutral elements corresponding to the electronic configurations. Use proper formatting; letter case matters. 1s²2s²2p³ 35²3p² 13²23²2p³ Set B

. Atomic Absorption Spectroscopy (AAs) and Atomic Emission Spectroscopy (AEs) have many uses including in forensic science and choice of colors for fireworks. Explain in not more than six (6) sentences how this is so.

In NMR we use solvents such as tetrachloromethane to prepare samples for the machine What is the molecular formula of tetrachloromethane? ii Why do you think tetrachloromethane is used as a solvent? iii Solvents that contain deuterium, D, are also used as solvents in NMR. Deuterium is the isotope 2H. A substance in which 'H is replaced by 2H is said to be deuterated. Why would the deuterated solvent CDCI, be used instead of CHCI,? Your answer

Analyzing a mixture of salts with differing cations and/or anions can be far more complicated than analyzing a single simple salt. Interference between cations or between anions can greatly increase the complexity of the results. Using sound chemical knowledge, suppose your simple salt is a white granular solid. At what specific step in the cation procedure might you begin your analysis? Explain your reasoning.  The steps are:  Chemistry of Group 2 Cation, Cu2+ Chemistry of Group 3 Cations, Fe3+, Ni2+, Mn2+ Chemistry of Group 4 Cations, Ba2+, Ca2+

What is the experiment isolation of casien about? how is it relevant to real world applications? Describe the overall purpose of the experiment?

A east.cengagenow.com C OWLV2 |Online teaching and learning resource from Cengage Learning urse: CHM 103 003 General Chemistry 0:58:02 [References] Which of the following compounds contains only one unshared pair of valence electrons? NH3 1 pt 1 pt O H,0 1 pt O CH4 O NaCl 1 pt O BF3 1 pt 1 pt Try Another Version 5 item attempts remaining Submit Answer 1 pt 1 pt 1 pt 1 pt 1 at gnment Cengage Learning Cengage Technical Support

TSO .. -SH DMF, SN2 OTS xs KCN

Calculate the densHy of Zinc using the atomic masS Gf Zinc and W dimensions of 3.5 x 2.5 x 2.5mm

1s2 25? 2p3 is the electronic configuration of O carbon O nitrogen O fluorine O chlorine

Chemistry  1.The following neighboring lines are observed in the microwave spectrum of H81Br: 64.275 and 81.436 cm-1. What is the bond length of this molecule? (1 amu = 1.66×10-27 kg; h = 6.626×10-34 J•s) A. 0.190 nm B. 0.141 nm C.0.163 nm D.None of the above is within 10% of the correct answer.

number of valence electron: Periodic Table Jacksonville University -X / mod /flcn/view.php?id=9635823 HW 3 A Activities and Due Dates HW3 Cive Uph Resources Group the electronic configurations of neutral elements in sets according to those you would expect to show similari chemical properties. Set A Set B Answer Bank 1s22s22p 1s2s22p 3s23p64s23d104p Is2s22p 3s23p 1s2s22p6 3s23p

Assuming HCl and DC1 have the same force constant (k) or potential energy, V(x) = kx², what is the vibrational frequency of DC1 if the vibrational frequency for HCl is 3000 cm ¹? (the atomic masses for H atom, D, atom and Cl atom are 1, 2, and 35, respectively) A. 516 cm-¹ B. 1250 cm-¹ C. 2150 cm-¹ D. 3000 cm-¹ E. 4190 cm-¹

Please refer to the image attached.

ks People Tab Window Help 82% Mon 1:1 kind Tap - Cengage Learning /evo/index.html?deploymentld%355750828934189288909969212&elSBN=9781305657571&nbld%3D2199... MINDTAP Q Search this cours Use the References to access important values if needed for this question. For each of the following species, give the total number of electrons, the number of electrons in the valence shell, and the number of core electrons. Species Number of electrons Number of electrons Number of core electrons in valence shell Ca Cs+ p3-

Consider the table. Metal | Tm (K) (kJ/mol) Ть (к) АНуар (kJ/mol) AHfus vap Li 454 2.99 1615 134.7 Na 371 2.60 1156 89.6 K 336 2.33 1033 77.1 Rb 312 2.34 956 69 Cs 302 2.10 942 66 for K. Using the data, calculate ASfus and ASvap J ASvap K-mol J ASfus K-mol

D ОН -ОН H30 (trace) H2O ? НО HN но -ОН HN. LOH

Hydrogen (H) and oxygen (O) are commonly found as diatomic molecules (not atoms). Upload a visual representation of molecular hydrogen (H2) and molecular oxygen (O2), using different colors to represent the different types of atoms. (And be sure to include a key to tell us which is which!)

What is the process of instrumentation in Potentiometry as well as in polarography? Include the common features of the instrument

. What is meant by inert pair effect? explain. List two (2) major reasons for the inert-pair effect.

Answer correctly

To estimate the boiling point of Oganesson by extrapolating the data for theboiling points of the other noble gases. The boiling points of the noble gases are given below: Helium -269oCNeon -246oCArgon -186oCKrypton -153oCXenon -108oCRadon -62oC 1. Make a nicely labeled graph of boiling point vs. number of electrons.Using this graph, extrapolate your data to make a prediction for the boiling point of oganesson.2. A brief explanation of why this method can be used to make a reasonableestimate of the boiling point of oganesson Your explanation should include a description of the intermolecular forces that are present in samples of these elements, and how they affect their boiling points.