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When excess aqueous silver was added to 25.00 mL of magnesium chloride solution, a precipitate of silver chloride formed. The dry precipitate had a mass of 6.2g. What was the concentration of the chloride ions in the solution of magnesium chloride?
The enthalpy of fusion of methanol (CH3OH) is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol?
Carbon dating is a well-calibrated radiometric dating system used for items generally younger than 50,000 years old (14 C has a half-life of 5730 years). A recently unearthed Viking burial mound contained a ship, a sample of which was found to hav..
What is the simplest formula of a compound if a sample of the compound contains 0.298mol X, 1.192mol Y, and 2.682mol Z?
The osmotic pressure of the resulting solution was 4.86 atm. Calculate the molar mass of the compound.
A sample of poylethylene is found to have an average molecular weight of 3.2x10^6. estimate the root-mean-square end-to-end distance if the sample is dissolved in a theta solvent. assume that the "persistence length" is equal to √2 times the C-C b..
Fe2O3(s)+3CO(g) --> 3CO2(g)+2Fe(s) the mass of carbon dioxide produced in the above reaction when 250 kJ of energy are released is:
Explain why butyl alcohol and isopropyl iodide are not formed in the reaction. Write a suitable mechanism for the cleavage of butyl isopropyl ether with HI at 100 degrees C to form exclusively isopropyl alcohol and 1- iodobutane.
calculate delta s values for following reactions. in each case, account for the sign of delta s. a) C2H4(g) + H2(g) ---> C2H6(g)
Calculate the mass of sodium acetate that must be added to 500.0mL of 0.200M acetic acid to form a pH = 5.00 buffer solution.
An aqueous solution ofhydroiodic acidis standardized by titration with a0.200M solution of barium hydroxide. If14.2mL of base are required to neutralize17.1mL of the acid, what is the molarity of thehydroiodic acidsolution?
A solution was prepared by mixing 50.00 mL of 0.190 M HNO3 and 124.00 mL of 0.150 M HNO3. Calculate the molarity of the final solution of nitric acid.
What is the best number of times to run the process? Consider four possible policies of running the process 1, 2, 3 or 4 times.
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