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A 5.00-mL aliquot of a solution that contains 2.79 ppmFe2+ is treated with an appropriate excess of thiocyanate and diluted to 50.0 mL. The molar absorptivity of aFe2+-thiocyanate solution at 580 nm is 7000 Lmol-1 cm-1. What is the absorbance of the above diluted Fe2+-thiocyanate solution at 580 nm in a10.00-cm cell?
The ClO2 molecule was involved in a chemical reaction in which it underwent oxidation. Based on the change in oxidation numbers, which of the species listed below is a possible product of the reaction
how much sodium carbonate kgday is required to precipitate 60 mgl of non-carbonate calcium in a water treatment plant
calculate the number of tons of carbon dioxide and sulfur dioxide produced by the plant during the year. (b) If 55% of SO2 could be removed by reaction with powdered CaO to form CaSO3, how many tons of CaSO3 would be produced.
Match the following physical and chemical properties with the compounds cyclohexane,C6H12 , or calcium nitrate, Ca(NO3)2. CHOICES: A: C6H12 or B: Ca(NO3)2
A 3.00 L container at 25 C contains 0.464 atm of CO2. When graphite is added to the container, some CO2 is converted to CO and at equilibrium the total pressure is 0.746 atm.
Determine the molarity of Ni in the 20.0 mL solution. Determine the mass in grams of Ni in the original sample. Determine the weight percent of Ni in the sample.
If the volume of the ocean (calculated above=6.3x10^20 Liters) contains 2.8 percent sodium chloride ("salt") by mass and the density of the water is 1.16 g/mL, calculate the total mass of sodium chloride. (1ton=2000lb, 1lb=453.6g) Calculate the ma..
The molecular mass of an unknown compound was determined by measuring the freezing point depression of an aqueous solution of the compound
A sample of CO2 gas at 795 torr is cooled from 25°C until the new pressure is 125 torr. Calculate the new temperature of the gas.
The orbital energy of any atomic species depends on factors other than the principle quantum number n and any given energy level in H is more stable than the same level in H+.
a 3.140 molal solution of nacl is prepared. how many grams of nacl are present in anbspsample containing 3.000 kg of
the maximum velocity of the ejected electrons is 3.45 multiplied by 105 m/s. Calculate the binding energy of electrons to the magnesium surface.
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