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A chemist obtains 250.0 mL of a solution containing an unknown concentration of calcium iodide, CaI2. He pipets 25 mL of this solution into a 100 mL volumetric flask and dilutes to the mark. He then pipets 10 mL of this diluted solution into a 100 mL volumetric flask and dilutes to the mark. He analyzes some of the solution from the final volumetric flask and finds that the iodide ion concentration is 2.46E-6 (2.46 × 10-6) M. (Note: in solution, calcium iodide breaks apart into one Ca2+ ion for every two I- ions, so a solution that is 1.0 M in CaI2 is 2.0 M in I-.) Determine the molar concentration of calcium iodide in the original solution
The basic Salt sodium acetate, CH3COONa, is completely soluble in water. What is the pOH of a 0.25 M solution of sodium acetate?
Calculate the energy of a mole of photon with wavelength of (a) 200nm (ultraviolet), (b) 150pm(X ray), and (c)1.00cm (microwave).
Which substance would provide the best protection for an iron pipe buried in the ground? for a lead pipe. Ag, Au, Cu, Mg, and Zn
Give the two substitution products (skeletal isomers) when the following compound is added to a solution of sodium acetate in acetic acid
A gaseous mixture containing 0.150 mol fraction of carbon tetrachloride (CCl4) and 0.850 mol fraction of dry air is initially at 65.0°C
A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mph when he throws a fast ball. Find the de Broglie wavelength
Which one of the following reactions is a combination reaction. a. A + B -› AB b. AB + CD -› AD + CB c. HX + BOH -› BX + H2O d. A + BC -› B + AC e. AB -› A + B
You need 70.2K to raise the temperature of 34.0 g of ammonia from 23 c to 24 c. Calculate the heat capacity of ammonia
A 330 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 626 mmHg. Calculate the moles of Ar present.
What mass percent of ethylene glycol in water must be used to reduce the freezing point of the mixture to -5.0degrees c?
what quanitity of energy does it take to convert 0.500kg ice at -20 Celsius to steam at 250 celsius? specific heat capacities: ice, 2.03J/g Celsius
The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m above the ground. The ball travels straight upward. In the absence of air resistance, to what maximu..
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