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a) Experimental procedure, part A. whats is the procedure for preparing 250 mL of 0.0210 M Na2S2O3 for this experiment from a 100 mL volume of standard 0.106 M Na2S2O3?
b) For the preparation of the 0.0210 M solution in a 250-mL volumetric flask. only a 25.0-mL calibrated volumetric pipet is available. explain how you would prepare the 0.0210 M Na2S2O3 solution using the 25.0-mL pipet. what would be its exact molar concentration?
If a sample of oxygen that occupies 1.00 x10^6 mL at 575 mmHg is subjected to a pressure of 1.25 atm, what is the final volume of the the sample?
This is equal to the number of moles of HCL present in the 5.00mL of HCL delivered to the flask. Compute the molarity of the HCL.
A 5.0 L bulb filled with 175 torr of He and a 7.5 mL bulb filled with 325 torr of Kr are connected together allowing the gases to mix. What is the final pressure in the combined bulbs, assuming the gases behave ideally and the volume of the connec..
0.10 mol of argon gas is admitted to an evacuated 50cm^3 container at 20C. The gas then undergoes an isobaric heating to a temperature of 300C.
What would be the expected effect on yield if only one mole of diethylamine per mole of alpha-chloro
why do we need to excess FCR? Also give 3 reasons why gallic acid is used as standard for the total phenolic assay?
Explain why f-f transitions in the electronic spectra of lanthanide complexes are weaker than d-d transistions in the corresponding spectra
A powder contains FeSO4·7H2O (molar mass = 278.01 g/mol) among other components. A 3.585-g sample of the powder was dissolved in HNO3 and heated to convert all iron to Fe3
Combustion reaction, A fuel has the following weight percentage composition, C = 52%, H = 11%, S = 0%, O = 9%, moisture = 13%, Ash = 15%
A certain quantity of a gas occupies 61.3 mL at 68 ?C. If the pressure remains constant, what would be the volume of the gas at 128 ?C?
Explain how the enthalpy, entropy, and free energy of this system change as the dissolving process proceeds. 2. Of the three parameters, AS, AH, and AG, specified in part 1, which has a sign diferent from the other two? Explain.
Determination of Molecular SO2 Needed for Protecting Wine, You have just finished fermenting a wine and the pH = 3.7. You need 2mg/L "molecular" SO2 to protect the wine. What level of free SO2 do you have to add to achieve the level of the molecul..
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