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Electrolysis of molten MgCl2 is the final production step in the isolation of magnesium from seawater. Assuming that 30.8 g Mg metal forms, calculate the following.
(a) How many moles of electrons are required?(b) How many coulombs are required?(c) How many amps are required to produce this amount in 2.25 h?
The first ionization energies for Ge, As, and Se are 762, 944, and 941kJ/mol, respectively. Explain these values in terms of their electron configurations.
How much heat would be released if 12.0 g of methane, CH4, was completely burned in oxygen to form carbon dioxide and water at standard state conditions
Glucose makes up about 0.10 % by mass of human blood. how do you calculate the molality.What further information would you need to determine the molarity of the solution
If you add a solvent called "dioxane" to water, a homogenous mixture forms. Dioxane and water have the same boiling point (100oC). How do you explain that the mixture of the two compounds shows a boiling point that is lower than the one found for ..
The pKas of the groups are 2.0, 4.4, and 8.9, respectively. A biochemist has 100 mL of a 0.1 M solution of this compound at a pH of 9. She adds 70 mL of 0.1 M HCl. What will be the pH of the solution after addition of the HCl?
What is the change in internal energy (in J) of a system that releases 675 J of thermal energy to its surroundings and has 5.60 * 10^2 cal of work done on it?
Calculate the molar solubility of CaCO3 ( Ksp = 4.5*10-9) neglecting the acid-base character
A 25.0 mL sample of 0.723 M HClO4 is titrated with a 0.27 M KOH solution. What is the pH after the addition of 80.0 mL of KOH
A specific steroid has max = 291 nm and molar absorptivity = 11,500. What is the concentration of the compound in a solution whose absorbance at 291 nm is A = 0.050 with a sample pathlength of 1.00 cm
The vapor pressure of benzene is 100 mmmHg at 26.1 C. Calculate the vapor pressure of a solution containing 26 g of camphor (C10H16O) dissolved in 98.5g of benzene. (Camphor us a low-volality solid.)
N2 is used industerial to produced Nitric acid, but contributes to acid rain and photo chemical smog. What value of nitrogen is formed at 742 torr and 28.7dgree by reacting 2.78cm^3 of cuppor 8.95gm/cm^3 .with 246 ml of nitric acid and 68% by mass
The following plot shows experimental data from a reaction. What is the third half life of the reactions if the slope of the plot if 0.0023 1/M*s and the y-intercept is 0.45 1/M ?
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