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A solution of HCl in water conducts an electrical current, but a solution of HCl in hexane does not. Explain this behavior in terms of ionization and chemical bonding?
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Hydrazine, N2H4, is dibasic and has Kb1 = 3.35x10-7 and Kb2 = 1.42x10-16. Calculate the concentration of OH- ions in a 29.91 M aqueous solution of hydrazine. Express your answer in mM.
The mass of a sample of CaCO3 is 751 grams How many total atoms are present in this sample?
In the spring time, a background ozone level of 29.0 ppbv was measured in Edmonton. Convert the mixing ratio of 29.0 ppbv ozone to units of molecules cm-3. Assume a pressure of 1.108 atm and a temperature of 12.5 ºC.
What was the initial energy level of an electron if it was excited by a photon of wavelength 38.9µm and jumped to an energy level of 10?
The common charges of an element can be related to the electron configuration of the element. Why would copper ions have 2 common charges? Explain each of them in terms of the electron configuration.
While heating your copper sulfur mixture the original crucible lid fell and was broken. You replace the lid with another one. You used the mass of the original lid in your calculations. However the mass of the second lid ...
Question - The solubility of O 2 (g) in water is 4.43 mg of O 2 /100g H 2 O at 20 o C and 1 atm pressure. What pressure of O 2 (g) would be required to produce a saturated solution that is 0.010 M O 2 ?
An aqueous solution has a normal boiling point of 102.0°C. What is the freezing point of this solution? For water K b is 0.51°C/ m and K f = 1.86°C/ m.
Consider reacting 100.00 mg magnesium with 20 mL of 1 M hydrochloric acid. Which reactant is limiting reagent? What is theoretical yield of hydrogen? express your answer in millimoles.
An 80-proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in 750mL of brandy?
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Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
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