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When 15.12 mL of 0.1194M NaOH is added to 25.00 mL of 0.1246M HX (an unknown weak acid), the resulting pH is 5.9. What is the Ka of the unknown acid?
zinc hydroxide is insoluble in water but dissolves when nitric acid solution is added, why? Write a balanced total ionic and net ionic equation for this reaction.
If a total of 13.5 mol NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of COs and NA3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)
A certain protein was found to contain 0.230 % iron by mass. Determine the minimum molecular mass of the protein.
provide mechanism for trans-1-bromo-2-methylcyclohexane rxn under e1 conditions
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 127.00pm. What wavelength of light would have sufficient energy to ionize the atom
the rate constant for the elementary reaction is 7.1x109mmiddots at 25degc. 2 nog o2g 2 no2gnbspwhat is the rate
We put the sample 50.0 cm3 0.02 M HCl solution and for the back titration of the acid we needed 25.3 cm3 0.02 M NaOH solution. Calculate the concentration of the ester which reacted.
Draw the structure for thin layer chromotography? what is it melting and boilng point, density, molecular weight and strucural formula
disulfur dichloride is produced by reacting chlorine gas with molten sulfur.s8 4 cl2 --gt 4 s2cl2what is the percent
How many joules of heat are needed to raise the temperature of 5.00 g of mercury from 25.1°C to 65.3°C?
The pressure in a gas arises because the particles of a gas strike each other and the walls of their container, exerting a ________. The larger the number of gas particles in a particular volume, the _______ the pressure within the gas.
In a particular solution, [Cr3+]=3.9x10-4 mol/L. What is the minimum pH at which Cr(OH)3(s) will precipitate from this solution. Assume the temperature is 25oC. For Cr(OH)3(s), Ksp=6.3x10-31 at 25oC. Give your answer with three digits
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