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A liter of a solution saturated at 25 Celsius with calcium oxalate, CaC2O4, is evaporated to dryness, giving a 0.0061 gm residue of CaC2O4. Compute the concentrations of the ions as well as the molar solubility and the solubility product constant for salt at 25 Celsius. Step by step and the balanced reaction
Element Z has two natural isotopes: Z-79 (78.918 amu) and Z-81 (80.916 amu). Calculate the atomic mass of element Z given the abundance of Z-81 is 49.31%.
A solution of a specific vitamin has ?max = 251nm and a concentration of 4.79x10^-7M. The absorbance of the solution at 251 nm is A = 0.175. What is the molar absorptivity of the vitamin at 251nm
What are the pressures, temperatures, enthalpies, and mass densities of the substance at the beginnings and ends of the processes?
Calculate P,V and T for initial and final states of each process and produce a plot of the two processes on a P,V diagram. Without resorting to equations, explain why the result for part (b) is greater than or less than the result for part (a).
If 0.600 gram of zinc is used, what is the amount of zinc chloride that is produced in the above reaction?
At high temperature, ammonia reduces copper(II) oxide to the free metal: 2NH3(g) + 6CuO(s) => N2(g) + 3Cu2O(s) + 3H2O(g) Step 2: 2NH3(g) + 3Cu2O(s) => N2(g) + 6Cu(s) + 3H2O(g)
A Geiger counter is placed 1cm from a radioactive spill and gives a reading of 12,000 cpm. At what distance is the intensity of radiation 40 cpm
Standard solution having the molar concentration 0.0130 M AgNO3. What mass of AgNO3 is required for this purpose?
The explosive nitroglycerin decomposes rapidly upon ignition or sudden impact according to the following balanced equation: 4C3H5N3O9 (l) --> 12 CO2 (g) + 10H2O (g) + 6N2 (g) + O2 (g)
Identify the number of electron groups around a molecule with a tetrahedral shape. a)4 b)3 c)5 d)2 e)1
In what type of material is the energy gap between the valence and the conduction band the greatest? Na, Ge or diamond. Draw a rough energy band showing the valence
An aerosol can has an internal pressure of 3.85atm at 25 degrees celsius. What temperature is required to raise the pressure to 18.0atm
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