Spectroscopy Unknown. The spectra and data provided were obtained from a pure organic molecule. For ¹H NMR Spectra, the integral is given in number of hydrogens (#H) or as a relative ratio. Important coupling constants (J-values) are listed next to the peaks for some examples. For some spectra, an inset (grey box) is also given showing a "zoom-in" on an important part of the spectrum. Mass Spectrum (not shown): [M] = 177 (100%) m/z IR Spectrum (not shown): 3200 (sh m), 3060, 2981, 1685, 1600, 1495 cm¹ (all listed are strong (s) unless otherwise indicated) ¹H NMR Spectrum (400 MHz, CDCI3, 25 °C) br s 180 10 1H (C) 8 13C NMR Spectrum, proton-decoupled (125 MHz, CDCl3, 25 °C) 160 2H 2H (CH) (C) (C) 140 (CH) PPM 120 100 PPM 80 60 E 2 1H 3H (CH3) (CH) 40 6H (CH3) 20

The triprotic form of the amino acid cysteine is shown below, along with the pK, value for each ionizable site. The isoelectric point (pl) for cysteine occurs at pH= 5.1. B 10.8 CH₂ SH C13 A LA -OH (1) What is the charge on the molecule at the isoelectric point? (2) In the predominant form of the molecule at the isoelectric point, is each of the sites (labeled A, B, and C) protonated or unprotonated? site A site B: site C

In a study of the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 CH 3 NC(g) CH 3 CN(g) the concentration of CH 3 NC was followed as a function of time It was found that a graph of ln[CH 3 NC] versus time in seconds gave a straight line with a slope of - 4.17 * 10 ^ - 3 * s ^ - 1 and a y intercept of -4.05 Based on this plot , the reaction is order in CH 3 NC and the rate constant for the reaction is

Page Grades for Nancy Duran: CHE 103 X A ALEKS - Nancy Duran - Learn × + ✰ www-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQgHlvdL2donGg9plnQUm9kiGJhghYuAiZLqZVWgwEXBsd4IBLw36AkXLcyDcVVrmllCzwt0IT1g... ? O CHEMICAL REACTIONS Limiting reactants QU N OO EXPLANATION Gaseous butane (CH₂(CH₂)₂CH3) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂) and gaseous water (H₂O). Suppose 2.3 g of butane is mixed with 4.49 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 3 significant digits. The question is a limiting reactant problem. You can tell it's a limiting reactant problem by the fact that you were given the initial amounts of more than one reactant. Here is the balanced chemical equation for the reaction you will need to solve the problem: 2 CH₂ (CH₂), CH₂(g) + 130₂ (g) → 8 CO₂(g) + 10 H₂O(g) You can solve limiting reactant problems in the following three steps: Step 1: Find the initial…

Part A Consider the equation for the decomposition of SO2 Cl2, SO2Cl2 (g) → SO2 (g) + Cl2 (g) Use the graph and the best fitting line to predict the concentration of SO2 Cl2 at 1700 s. The graph of In SO2 Cl2] versus time is Express your answer to two significant figures and include the appropriate units. -2.3 Slope y-intercept HẢ ? -2.4 y = -0.000290t - 2.30 -2.5 Value Units -2.6- -2.7 Submit Request Answer -2.8+ 500 1000 1500 2000 Time (s) Provide Feedback In [SO,Cl2]

I’m really stuck here how can I do this ?

A group of students compiled the data shown in data table 1 below.  What is the exact calculated order for H+(aq) to 2 decimal places? Exp. # [IO3-]0 (M)   [I-]0 (M)    [H+]0 (M) Time (s) 1 0.005 0.05 2 x 10-5 22.12 2 0.010 0.05 2 x 10-5 86.84 3 0.005 0.10 2 x 10-5 5.35 4 0.005 0.05 4 x 10-5 2.65     Question 6 options:   2.82   -2.51   3.34   2.71   -2.58   3.12   2.91   3.49   3.41   3.23   3.06   2.64

Given the plot: 5x 10 4x 10 3x 10 2x 10 1x 10 100 200 300 400 Time (sec) What rate is being referred to by the following expression rate = [ 6 x10-3 mol/LJ /0 sec A. Instantaneos rate rate = [3 x103 molL - 4 x103 movL ]/ (99 sec -50 sec) B. initial rate rate = [1 x103 mol/L - 6 x10-3 molVL]/ (0 sec -400 sec) C. Average rate Phenolphthalein concentration (molL)

Consider the equation for the decomposition of SO2C22, SO2Cl2 (g) → S02(g) + Cl2 (g) The graph of In SO2 Cl2] versus time is -2.3- Slope y-intercept -2.4 y -0.000290t 2.30 -2.5 -2.6- -2.7 -2.8+ 0. 500 1000 1500 2000 Time (s) You may want to reference (Page) Section 14.4 while completing this problem. In [SO,Cl]