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What is the mole ratio of CH3COONa to CH3COOH (Ka= 1.8×10-5 ) would be in a buffer solution at pH 5?
A quantity of 6.0 moles of an ideal gas is reversibly heated at constant volume from 17 C to 35 C. Calculate the entropy change.
Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu. The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu. Answer 3.507 amu 1.056 amu 0.079 amu 0.564 amu 0.528 amu
Water soluble proteins do not contain amino acids with hydrocarbon R-groups. The hydrocarbon chains on these amino acid R-groups aren't long enough to make them not soluble in water.
A radioactive sample contains 1.30g of an isotope with a half-life of 3.5 days. What mass of the isotope will remain after 5.6 days? (Assume no excretion of the nuclide from the body.)
A cell measured by a student was found to be -0.461V against a Ag/AgCl reference electrode (0.222V). What is the potential when measured against SCE and NHE
How many grams of glucose are in 100. rm mL of the final solution?
sample of KHP requires 19.27mL of NaOH to reach the end point. What is the concentration of NaOH?
Determine ΔG for this reaction When A is full into a cylinder at a pressure of 9.89 atm and the system is permitted to come to equilibrium, the final pressure was 15.94 atm.? Express your answer in units of kJ/mol
Coal = 3.9% sulphur power plant while producing electricity turns coal into sulphur dioxide gas calcium oxide is used to react with sulphur dioxide and forms solid calcium sulfite coal
using the hendersoon hasselbach equation calculate the pH of a solution made by adding 50.0mL of 1.00M sodium acetate to 50.0mL
They were also planning to react ethyl bromide with a nucleophile. They came across the following nucleophiles in the lab: i) OH- ii)CH3CO2- iii) HO2- iv) H2O What is the relative order of of their reactivity in an Sn2 reaction with ethyl bromide
What is the concentration of a solution that has 2.79 g of Co(NO3)2 dissolved into enough water to give a total volume 125 mL
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