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Explain what is the volume percentage of a solution prepared by disolving 17 g of NaOH in enough water to make a final volume of 120 ml?Explain how many ml of a 10% solution can be made from the solution in the first question?
a 1.00 L solution contains 4*10^-4 M Cu(NO3)2 and 1.6*10^-3 M ethyleneddiamine. the Kf for Cu(en)2^2+ is 1*10^20, what is the concentration of Cu+2 in the solution
The pH of a bicarbonate-carbonic acid buffer is 8.30. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
Using the triple point of water as the reference temperature, use the heat capacity equations for water to estimate the heat of vaporisation of water (in kJ/kg) at 1 atm.
pure ag melts at 961.8 degc and boils at 2162 degc. the heat of fusion for ag is 11.28kj per mol and the heat of
Calculate A for a process in which 0.160 mole of an ideal gas expands from 1.0 L to 3.5 L against a constant pressure
the quantity 432 mg of a monoamino monocarboxylic amino acid isobserved to consume 7.39 meq of acid and base in the
assume that due to dwindling supplies of crude oil and natural gas the us embarks on a plan to implement the hydrogen
The free energy change Delta GT at 2400 K is equal to 1.22*10^5 J/mol. Calculate the equilibrium constant at 2400 K.
Sulfur dioxide (SO2) is an unwelcome result of burning soft coal in power plants. Some of the SO2 ends up as sulfuric acid in acid precipitation.
Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of red brass consisting of 80.0%Cu and 20.0% Zn by mass has a density of 8780 k/m3. a)What is the molality of in the solid solution
if a 1.00 g piece of gold (density = 19.32 g/cm^3) is hammered into a sheet 8.0 x 5.0 ft what is the average thickness of the sheet in meters?
what is the molarity of a potassium permanganate solution if 25.0 ml of it reacts with 10.0 ml of .0100 M sodium sulfite under acidic condictions.
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