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Explain what are the concentrations of benzoic acid as well as benzoate if a solution containing 0.2 mM benzoic acid is adjusted at pH 7.2?
Aluminum has many different isotopes. What percentage of the mass of 26Al is attributable to its neutrons
Remember that M1V1=M2V2. What volume of distilled water do you need to add to dilute 10 mL of a 100 mM Tris- HCl buffer solution to a concentration of 10 mM
Which of the following buffer systems would be the best choice to create a buffer with the pH= 9.00? For the best system , calculate the ratio of the masses of the buffer components required to make the buffer.
What is the molality of a solution prepared by dissolving 40.0g of glucose (C6H12O6) in 4.00kg of water?
Explain if the enthalpy of combustion of the compound is -3298.0 kJ/mol as well as the temperature of the calorimeter rises from 25.14 C to 27.9 C, Define how many moles of the compound were oxidized
Predict the chemical formulas and IUPAC names of the missing reactants or products, to complete the following chemical reactions
the vapour pressure of pyridine is 50.0 kpa at 365.7 k and the normal boiling point is 388.4 k. what is the enthalpy of
look up the densities of ethanol and water at room T in a habnbook ethanol 0.789 g/cm^3 and water 0.998 plot these two points on a graoh at 0 and 100%H2O
The molar volume of the liquid at this temperature and pressure is 163.3 cm^3/mol. At 100 atm the melting temp changes to 351.26 K. Calculate the enthalpy and entropy of fusion of the solid.
The [Br] of the resulting solution if 0.672 M. Assuming the volume is additive, calculate the molarity of the first solution?
If you put 120 volts of electricity through a pickle, the pickle will smoke and start glowing an orange-yellow color. The light is emitted because the sodium ions in the pickle become excited; their return to the ground state results in light emis..
A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation.
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