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The following chemical shifts (in ppm) were observed for a given molecule using a 120 MHz NMR:
CH3= 2.25ppm; CH2= 3.63ppm
What is the frequency difference in these shifts, assuming that TMS is tuned to a frequency of 120 MHz? What would be the frequency difference for the above shifts using a 600 MHz instrument?
a 5 mw gas turbine power plant is reported to have a thermodynamic efficiency of 35. assume products of reaction exit
Use Le Chatelier's principle to explain the color change which you observed after the addition of distilled water to the equilibrium mixture above.
What volume of 3M H2SO4 is needed to neutralize all of the disodium salicylate and the excess NaOH present after the initial reaction? How much sulfuric acid was in excess
The color of most coordination compounds can be explained by the energy difference between the two sets of d orbitals in a complex.
The Coal is fed with 200% excess water ( excess is calculated with respect to CO formation) 100% of coal is consumed. the selectivity to CO (with respect to CO2) is 1:1 the functional conversion of the CO is 50% what is the final gas composition? ..
if 24g mg is used and the percentage yield is 95 how many grams of magnesium hydroxide should be
A solution was prepared by dissolving 5.76g of KCL*MgCl2*6H2O (277.85g/mol) in sufficient water to give 2.000L
The most important commercial process for converting N2 from the air into nitrogen-containing compounds is based on the reaction of N2 and H2 to form ammonia (NH3)
calculate the volume of air at 35 degrees Celsius and .96 atmosphere that is needed to burn completely 12.51 grams of pentane
Which conformation of bromo-cyclohexane undergoes reaction with potassium t-butoxide and use a Newman diagram to explain
Hydrochloric acid (HCl) reacts with sodium carbonate (Na2CO3), forming sodium chloride (NaCl), water (H2O), and carbon dioxide (CO2). This equation is balanced as written: 2HCl(aq)+Na2Co3(aq) --- 2NaCl(aq)+H2O(I)+CO2(g)
a solution is prepared by dissolving 4.21g of a nonelectrolyte in 50.0 g of water. if the boiling point increases by
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