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5 mL of a 0.002M solution of HCl is dissolved in 0.5 Liters of water. What is the concentration of H3O+ ions in the solution?
a. 1 x 10^-4 Mb. 2 x 10^-5 Mc. 1 x 10^-6 Md. 1 x 10^-7 Me. 2 x 10^-7 M
62 mL of 1.7M solution is diluted to a volume of 208mL. A 104mL portion of that solution is diluted using 141mL of water. What is the final concentration
What is the molality of a solution prepared by dissolving 40.0g of glucose (C6H12O6) in 4.00kg of water?
A reaction mixture initially contains 4.2 mol ZnS. a. How many moles of oxygen will be required to react with ZnS b. Assuming there is enough oxygen,
When NO(g) reacts with H2(g) to form N2(g) and H2O(l), 376 kJ of energy are evolved for each mole of NO(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
what is the conduction electron density of copper/ Answer should be stated as number of conduction electrons per cubic meter.
Two reactions have the same activation energy, but their rates at the same temperature differ by a factor of 10. Explain.
Tris is a commonly used buffer in biochemistry. It works well in the neutral to slightly basic pH range. A working solution of Tris-HCl buffer was made by mixing equal volumes of Tris base solution
The redox reaction of peroxydisulfate with iodide has been used for many years as part of the iodine clock reaction which introduces students to kinetics. If Eºcell = 1.587 V and Eº of the anode half-cell is 0.536 V, what is Eº of the cathode half..
A sample of commercial hydrogen peroxide solution was analyzed using the procedure in this experiment. the results from three determinations were 3.03% ,2.89% and 3.22%
How much heat energy is liberated when 11.0 grams of manganese is used in the formation of Mn2O3
a solution is 0.010 m in both br- and so42-. a 0.250 m solution of leadii nitrate pbno32 is slowly added to it. a which
How many silicon atoms are there in 1 cm3 of material. Suppose you dope that 1cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required
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