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The mass spectrum of an organic compound shows the relative abundances of M to be 62.87% and M 1 to be 4.760%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundances: 12C is 98.93% and 13C is 1.07%
How much energy (in Joules) is required to heat 10.99 g of water from 12.9 Celsius to 42.4 Celsius?
What is the theoretical yield of aspirin if 190 kg of salicylic acid is allowed to react with 128 kg of acetic anhydride?
Draw the most stable form of the major mixed Claisen product formed in the reaction.
Calculate the resulting pH if 455 mL of 0.200 M HCl is mixed with 315 mL of 0.0850 M Ca(OH)2.
The concentration of methane in the biogas leaving an anaerobic digester (part of a wastewater treatment system) is 55% (volume basis) at 50 °C. The remaining 45% is CO2.
Use a systematic treatment of equilibrium to calculate the pH of a solution prepared by diluting 0.467 g of aniline (aminobenzene, C6H5NH2) to 100.0 mL.
If you dilute 28.0 of the stock solution to a final volume of 0.540 , what will be the concentration of the diluted solution?
A 15 mL sample of a solution of Pb(ClO3)2 was diluted with water to 19 mL. A 15 mL sample of the dilute solution was found to contain 0.027 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution.
Estimate the average concentration of methylene chloride. Look up the TL V or the 1WA for methylene chloride and consider how the: evaporation might be performed.
What are some reasons why there would be a difference between the expected and actual values for the moles of copper oxide produced from heating copper in the air.
determine the value Keq at 400K for the decomposition of phosphorus trichloride of [PCl5]=0.135 mol/L, [PCl3]=0.550mol/L.. and [Cl2]=0.550mol/L the equation for the reaction.
At what temperature will 6.21 g of oxygen gas exert a pressure of 5.00 atm in a 10.0-L container
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