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What is the concentration of free [Cu2+] in an aqueous solution prepared as 0.25M in Cu2+ and 1.50M [NH3]. Cu2+(aq) + 4NH3? [Cu(NH3)4]2+ (aq) Kf = 5.0 x10^12
The temperature of the calorimeter rose from 25C to 33.73C. If the heat capacity of the calorimeter was 9,630 J/C, what is the value of delta H for the combustion reaction in KJ/mol.
The group D2h has a C2 axis perpendicular to the principal axis and a horizontal mirror plane. show that the group must therefore have a center of inversion.
During a period of discharge of a lead-acid battery, 404 g of Pb} from the anode is converted into PbSO_4 (s). What mass of PbO_2 (s) is reduced at the cathode during this same period. Also How many coulombs of electrical charge are transferred fro..
A 15.0 L flask contains 2.00 moles of N2 and 6.00 moles of H2 at 728 oC. A. Before any reaction takes place, what is the partial pressure of N2 in the flask?
Draw the major and minor resonance structure for the carbonate ion (CO3^-2). Include any formal charges, Indicate which are the major resonance structures and why.
What mass of ammonium chloride should be added to 2.45L of a 0.145M NH3 in order to obtain a buffer with a pH of 9.45
Determined if CS 2 of 2.500 grams mix with an excess of chlorine gas , 9.310 Kilo joule of heat is evolved. What sort of reaction is this , Is the reaction exotermic also find out delta H for the reaction?
Do the following planes all belong to the same zone: (-1 1 0), (-3 1 1), (-1 -3 2)? If so, what is the zone axis?
Diethylamine, (C2H5)2NH, is a weak base (pKb=3.16 at 25oC). What is the pH of 0.155 mol/L (C2H5)2NH(aq) at 25oC? Give your answer accurate to two decimal places.
what volume of ethylene glycol a nonelectrolyte must be added to 15.0 liters of water to produce an antifreeze solution
A. Suppose you wanted to produce 1.00L of a 3.50 M aqueous solution of H2SO4. 1. What is the solute 2. What is the solvent 3. How many grams of solute are needed to make this solution
A sample of helium gas has a volume of 241 mL at 0.83 atm. What pressure is needed to reduce the volume at constant temperature to 35 mL.
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