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Determine the shortest frequency of light required to remove an electron from a sample of Ti metal, if the binding energy of titanium is 3.14 x 103 kJ/mol.
Some wastewater has a BOD5 of 150 mg/L. The reaction rate is 0.23/d. What is the ultimate carbonaceous BOD
A 100. mL sample of 0.10 M HCl is mixed with 50. mL of 0.11 M NH3. What is the resulting pH. (Kb for NH3 = 1.8 x 10^-5)
a balloon contains 0.140 g of helium at a pressure of 1.00 atm. at what temperature will the balloon have a diameter of
The bromination solution is prepared by mixing liquid bromine with glacial acetic acid 1:4 v/v (bromine to acid). The density of bromine is 3.12 g/mL. Calculate the molarity of 1.00 L of bromine solution.
What is the value of at this temperature? 23.15 At this temperature the rate constant for the reverse reaction is 310. . What is for the reaction?
Complete and Balance the following redox equation. MnO4 + H +Br-->Mn2 +Br2 +H2O (acidic Solution). The sum of the smallest whole number coefficients is
A sample of 30.0 ml of krypton gas, Kr, is at 756 mm Hg and 25.0 degree celsius. What is the new volume if the pressure is decreased to 325 mm Hg and the temperature is decreased to -12.5 degree celsius?
Calculate the Boyle temperatures for carbon dioxide, oxygen, and nitrogen using the van der Waals constants. How close do they come to the experimental values? (CO2 = 713, O2=405, and N2=327)
The very dense metal iridium has a face-centered cubic unit cell and a density of 22.56 g/cm3. Use this information to calculate the radius of an atom of the element.
Determine the pH of a solution that is 1.80% NaOH by mass. Assume that the solution has density of 1.01 g/ml.
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid C6H5CO2H and 0.15 M sodium benzoate C6H5CO2Na. For benzoic acid, Ka = 6.5 x 10-5.
if the amount of hg in an industrial-waste pond is 0.39 micrograms ugml how much hg is present in kg if the pond has a
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