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Compute the pH of .325L of a .545M NaHSO3- .295M Na2SO3 buffer before as well as after the addition of the subsequent substances.
Compute the after the addition of 5.0ml of 0.240M HCL
Compute the after the addition of 5.0ml of 0.150 M NaOH
The efficiency of light source = energy of visible light/ total energy 7. What is the relationship between light intensity and distance from the source?
Which solution will be a better buffer at pH 4.74? a. 0.5 M acetic acid + 0.5M sodium acetate b. 0.1 M acetic acid + 0.1 M sodium acetate
A quantity of ice at 0°C is added to 66.4 g of water in a glass at 55°C. After the ice melted, the temperature of the water in the glass was 15°C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(..
How many mL of .360M HNO3 are needed to neutralize a 22.5mL sample of .240M KOH.
Melting point of a mixture A + B was measured to be higher than any of the melting points of pure individual components A and B. When this might be the case. (A possibility of an experimental error was excluded).
Calculate the concentrations of species in solution and the pH when 0.1 moles of FeSO4 are placed in 1 L H2O at T=25 deg C. Consider hydrolysis and assume ideal solution. The pK of FeSO4 is 10^-2.65.
which of the following ionic compounds are soluble in water and which are insoluble: a)KCl. b)MgSO4. c)CuS. d)AgNO3. e)Ca(OH)2
Uric acid dissociates as shown in the figure at the right with a pKa of 5.80, and can be treated as a simple monoprotic acid in this pH range.
The enthalpy change for the reaction below at 25oC is -1,249 kJ (per mole of C6H14). What is the internal energy change for the reaction at 25oC? 6 CO(g) + 13 H2(g) --> C6H14(l) + 6 H2O(l)
A gas mixture containing methane and n-butane enters an absorber tower at 20°C and a flowrate of 125 m 3 /h. The partial pressures at these conditions are 105 kPa for methane and 580 kPa for n-butane
A 0.325 mol sample of PCl5(g) is injected into an empty 4.15 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
0.000333 g fluorescein (332.32 g/mol) is dissolved in 225 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)
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