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Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 6.9×104 A flowing for a period of 23h . Assume the electrolytic cell is 80% efficient.
A student wants to conduct an experiment requiring 500 ml of a 3 M sulfuric acid 18 M concentrated sulfuric acid is available. How could the student prepare the desired solution
Consider the lewis structure for the polyatomic oxyanion shown below, where X is the element from the 3rd period (Na- Ar). By changing the overall charge
A sample of sulfur weighing 0.210g was dissolved in 17.8g carbon disulfide. (Kb= 2.340C/m ) If the boiling point elevation was 0.1070C, what is the formula of a sulfur molecule in this environment
Assuming that the drug components whose spots you identified dissolved completely when you stirred the tablet with 1:1 ethanol/dichloromethane, what was the solid that remained behind?
Which of the following wave functions are eigen functions of the operator d^2/dx^2? If they are eigen functions what is the eigen value? b) sin (2?x/a)
carbon dioxide escapes due to A leak , leaving only 3.5 moles of CO 2 inside the balloon. Determine the new volume of the balloon?
What is the molality of CrCl3 in a solution prepared by dissolving 75.2 g chromium(III) chloride hexahydrate in 250.0 g of water.
formic acid is titrated with 0.50 M sodium hydroxide, calculate the pH before any of the titrant (NaOH solution) is added and after 15.0 mL of the titrant has been added.
How many grams of carbon dioxide (CO2) can form when a mixture of 4.95 g of ethylene (C2H4) and 3.25 g of oxygen is ignited. Assume complete combustion to CO2 and H2O.
An equilibrium mixture of propanoic acid (propionic acid), CH3CH2COOH, and its conjugate base has a pH of 4.87. Draw the form that predominates after H3O is removed from the equilibrium mixture
If you are given sodium acetate and asked to make a .5 M acetate buffer at pH 4.75, will you have to add acid, base, or nothing in order to achieve the proper pH? What is the approximate pH after adding the sodium acetate?
what is the energy difference between the heats of formation you calculated for carbocation A and B?
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