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How many grams of dry NH4Cl need to be added to 1.80L of a 0.400M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.90? Kb for ammonia is 1.8*10^-5.
Equilibrium between the composition of Hydrogen sulphide in the gaseous and liquid phases can be represented as Yn=48.3Xn.
How many mL Hydrochloric acid of 0.1 M must be added to 100 mL of a 0.2 M solution of tris base to form a buffer ( pH 7.8)?
What is the probability of populating the first excited vibrational state (n = 1) at 298 K? Does isotopic substitution affect the probability? Would the intensity of absorption peaks be affected by isotopic substitution?
Determine which monomer will have the higher degree of polymerization (DP) and by how much?
What volume of 0.140 M Hydrochloric acid is required to neutralize 2.68g of Magnesium hydroxide.
For the equilibrium H2+CO2-> Kc= 3.18 at 1106K. If each of the 4 species was initially present at a concentration of 3.000M.
Identify the nuclide produced when americium-241 decays by alpha emission, 241 / 95 Am→ 4 / 2 He + ? Express your answer as an isotope using prescripts.
Compute the enthalpy change, , for this reaction per mole of (Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] )
Determine How much heat energy, is needed to convert 64.0 grams of ice at -18.0 degrees Celsius to H 2 O at 25.0 Normal Temperature ? express your answer in kilojoules
The combustion of an organic compound releases 35.6 kJ of energy and causes the temperature of a constant volume calorimeter to increase by 4.76 °C .
Determine what percent by weight of sodium carbonate does it contain If the specific gravity of the sodium carbonate solution = 1.25,?
The visual raw meat color was red(outside) and brown(inside) and when mixed with NaNO2 and NaNO3 the color changed to slight maroon and medium brown and pink.
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