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The absorbance of a solution of NiCL2 Of unknown concentration is found to be 0.388. What is the concentration of this solution?
Calculate the concentration of Hg2+, HgCl+, and HgCl2 that result when 1.00 L of a 0.100M Hg(NO3)2 solution is mixed with an equal volume of 0.100M HgCl2 solution.
What would you expect to observe in terms of the angle of rotation if you were to double the concentration of a sample, but kept all other variables constant?
A liquid unknown was found to be insoluble in water and soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58 degrees C at 670mm Hg
If a 1.22 g piece of gold is hammered into a sheet whose area is 32.4 ft2, what is the average thickness of the sheet? (The density of gold is 19.32 g cm-3.)
Zinc chloride (ZnCl2) is 52.02% chlorine by mass. What mass of chlorine is contained in 65.0 g of ZnCl2?Answer in units of g.How many moles of Cl is this?Answer in units of mol.
find the density of a substance with a mass of 51.2g and a volume of
The conductivity of a solution can be measured easily with a probe that dips into a solution and a meter that reads out in siemens (1 siemens = 1 ohm-1). The equivalent conductance,
50.00 mL of 0.10 M HNO2 (nitrous acid, Ka = 4.5 ´ 10-4) is titrated with a 0.10 M KOH solution. After 25.00 mL of the KOH solution is added, the pH in the titration flask will be
Ammonium carbamate (NH2COONH4) is found in the blood and urine of mammals. At a temperature of 466 K, Kc = 0.080 for the following equilibrium: NH2COONH4(s) 2 NH3(g) + CO2(g). If 10.2 g of ammonium carbamate is introduced into a 0.500 L containe..
what is the pH of a buffer system in which the relevant pKa is 5.0 and there is an acid/base ration of 2
Tenzic acid is a H2Tenz is a diprotic acid with ionization constants Ka1 = 4.1 x 10-4, Ka2 = 1.5 x 10-9. Calculate a value for the [Tenz2-] in a 0.500 molar solution of H2Tenz.
The Environmental Protection Agency has estimated that 119 tons of mercury are currently emitted to Earth's atmosphere annually due to human activities
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