Calculate the relative intensities of the major molecular ions of 1,2-dibromo-1,1,2,2-tetrachloroethane
Calculate the relative intensities of the major molecular ions of 1,2-dibromo-1,1,2,2-tetrachloroethane
4. (2 pts) For 1,2-dichlorobenzene, calculate the masses (to 5 significant figures) and relative abundances (to two significant figures) of the molecular ions: M, M+2, and M+4.
Calculate the theoretical yield of the product, 1,2-dibromo-1,2-diphenylethane, if 0.400 g of (E/Z) stilbene and 0.800 g of pyridinium tribromide were used in the reaction.
So we are doing a Green Bromination of Stilbene and need to calculate the percent yield of the reaction Percent yield of 1,2-dibromo-1,2-diphenylethane the starting material: molecular weight =66g/mol starting mass = 1.28 g the product molecular weight= 164 g/mol At the completion of your reaction you isolated 2.61 g of your desired product. From the following information calculate the % yield of your reaction. Show your work and watch sigfigs!
Be sure to answer all parts. The molecular scene at right depicts the relative concentrations of H3O+ (purple) and OH− (green) in an aqueous solution at 25 ° C. (Counter ions and solvent molecules are omitted for clarity.) (a) Calculate the pH. (b) How many H3O+ ions would you have to draw for every OH− ion to depict a solution of pH 4.90? Enter your answer in scientific notation. × 10 We were unable to transcribe this imageWe were unable...
Problem: 1.3: Calculate the number average and weight average relative molecular mass for a sample of polystyrene made by blending eight separate fractions, each of which has a very narrow molecular mass distribution, as follows: RMM | Weight/ g 15k 0.10 27k 0.19 39k56k78k 0.25 0.17 0.12 104k120k 0.08 0.06 153k 0.04 | Solution:
molecular formula is not given No forma For the IR spectrum, each major signal should be identified by wavenumber (stretching. frequency) and assigned to the corresponding bond. A conclusion about functional groups should also be drawn from the spectrum. In the C-NMR spectrum, the chemical shift of each signal should be noted and a structural assignment should be made. In 'H-NMR spectrum, the chemical shift, integration, and splitting pattern for each signal should be noted and a structural assignment should...
label each major peak with a molecular formula (including charge) label the molecular ion peak as "M+" (if present) label major peaks other than the molecular ion with three things: 1) the mass to charge ratio 2) the structure or formula for that charged fragment 3) another formula to show which fragment was lost by the molecular ion to form that ion Mass spec NEUTRAL COMPOUND 100- 80 2-6utanene 60 40 20- 75 60 65 70 35 40 45 10...
Ouestion 2 The relative molecular mass of carbon dioxide, CO2, is 44. The value of y is 1.3 and was determined experimentally. Assume that CO2 behaves as a perfect gas. 2.1. Calculate the specific gas constant, R. 2.2. Calculate the specific heat capacity at constant volume, C 2.3. Calculate the specific heat capacity at constant pressure, Cp
Construct a molecular orbital diagram showing the relative energy spacing of cyclopentadienyl. Use real energy values. Calculate the coefficients in front of the five pi orbitals, giving us the five orthogonal Huckel pi molecular orbitals of cyclopentadienyl. Draw all possible pi molecular orbital orientations for cyclopentadienyl, including the nodal planes, relating them to the energy levels determined in the first question.
Name: 2.2 Hydrogen The relative isotopic abundance for hydrogen 2H: 1H is about 0.00016: 1, and therefore hydrogen isotopic substitutions are unlikely to play a major role in any observed (M+1) peak. The isotope 2H is called "heavy hydrogen or deuterium, and is given the symbol D. We can often provide support for mechanisms by incorporating isotopes such as 13C or D into compounds using isotopically labelled reagents. Mass spectrometry is a useful tool for analyzing such isotopic incorporation by...