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For the subsequent compound, illustrate in its acidic form, state the form that will predominate in solution at pH = 5.5 and at pH = 3.5: CH3COOH (pKa =4.76)
an aqueous solution of ethanol c2h5oh is 19.00 ethanol by mass and has a density of 0.9700 g ml-1. calculate the
Determine the enthalpy change for the combustion of ammonium nitrate(NH4NO3)with decane (C10H22) in oxygen. Hf for C10H22= -249.7 kJ/mol
why is it best to cool the crucible and lid (and sample) in a desiccator rather than on the laboratory bench
Upon digestion and analysis of DNA sample from animal tissue, there are almost always equal amounts of purines and pyrimidines. Explain why this is so.
The relationship of [A]t / [A]o = 0.50^n, where n=number of half lives. n = I understand that the linear plot of 1/[C4H6] means second order.. but i do not understand how to calculate the half life from this information for part b.
calculate the amount of heat needed to boil 50.6g of ethanol ch3ch3oh beginning from a temperature of 24.4c . round
Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. Express your answer as a chemical formula.
Chlorine trifluoride is used in processing nuclear reactor fuel. It has a vapor pressure of 29.1 torr at -47.0°C and its heat of vaporization is 30.61 kJ/mol.
Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 3.0 10-6) by 0.200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added.
Find the volume (mL) and pH of 0.0588 M KOH needed to reach the equivalence point(s) in titrations of the following. (a) 20.8 mL of 0.0376 M HNO2 (b) 14.8 mL of 0.104 M H2CO3 (two equivalence points so both the first and second volumes and pHs are re..
Explain what is the purpose of washing the ether layer in separatory funnel with saturated aqueous sodium chloride in the synthesis of triphenylmethanol
Give the term symbol for the term occurs from each of the subsequent H-atom electron configurations, 1s, 2p, 3d. Give the values for L and S for a 4F term
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