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How many grams of dry NH4Cl need to be added to 2.50 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8*10^-5.
Write the structure of the conjugate acid of this base while consider the base monosodium phosphate, Na (HO)2P( O)O also explain why an aqueous solution of monosodium phosphate would be ineffective for extracting benzoic acid? pKa of this conjugat..
calculate the energy (in kJ) of a photon which has a wavelength of a mircowave with a wavelength of 2.84 cm
A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 ml. The mass of the water
The activation energy for a reaction is found to be 80 kj/mol. calculate the temperature at which the rate will be ten times that of 0 deg. celsius.
If you drop 25 g warm nails initial temp 65.4 into coffee cup calorimeter that contains 100.0 g water at 20 degrees Celsius, what will the temperature be.
A mixture of NaCl and NaBr has a mass of 2.08g and is found to contain 0.78 of Na.What is the Mass of NaBr in the mixture.
Rank the following aqueous solutions in order of increasing boiling point: 0.10 mNa2SO4, 0.10 m SrSO4, 0.25 m sucrose, 0.20 m glucose, 0.15 m NaCl
a sample of nitrogen gas is collected over water at a tempature of 23.0 c. what is the pressure of the nitrogen gas if atmospheric pressure is 785 mm hg
How much energy is released during the complete combustion of 433 grams of cyclopropane
A quantity of N2 occupies 62.2 L at a particular temperature and pressure. Its density is 0.900 g/L. How many moles of N2 are in the container?
How much energy (heat) is released when 1.9 moles of H2 reacts with 0.7 moles of Cl2 to create HCl(g) if the ΔHrxn = -184.6 kJ.
The total molarity of acid and conjugate base = 0.100M. A boy adds 4.20 milliliters of a 0.370 M solution to the beaker. Determine how much will the pH change?
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