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Percent Chloride in the unknwon The student precipitated silver chloride as the final product. Upon weighing, she found the mass of silver chloride was 1.0922g. The orginal unknown chloride sample was 3.2432g. Calculate percent chloride in the unknown
Calculate the value of the activation energy for decomposation of NOCL?
Stishovite is a high pressure form of SiO2 found in meteorite craters. While normal SiO2 has the quartz structure, in which each Si is coordinated by four O atoms
A 20 degrees Celsius, the solubility of potassium nitrate is 30g in 100g of water. A 35 gram solution of potassium nitrate in water was determined to contain 10 grams of KNO3.
The first-order disappearance of a substance has a half-life of 34.0 s. How long does it take for the concentration of the substance to fall to 12.5% of the original value
If you used 8,400 kilojoules you expend in energy in one day to heat 49,000 grams of water at 18 degrees celcius, What would be the rise in temp?, and What would be the new temp of the water?
Find the pH of a 0.15 M solution of ammonia, NH3. Kb = 1.8*10^-5
Will nitric acid digest and contaminate a sample with additional carbon if it is filtered with a cellulose filter paper?
Water vapor can be maintained at 100 oC and 2 atm pressure for a time; it will spontaneously revert to a liquid. calculate delta H, delta S, delta G for g->l. Assume vapor behaves ideally and liquid is basically imcompressible.
A unknown liquid is insoluble in water and soluble in cyclohexane and alcohol with a boiling point of 110 C What is the substance?
At what concentration does hydrocyanic acid (ka= 4.9 x 10^-10) exhibit 0.05 percent ionization? Assume the temperature to be 25*C
What is the energy uncertainty associated with a short pulse of laser light that lasts for only 4.8 femtoseconds (fs)? Suppose the low energy end of the pulse had a wavelength of 727 .
A certain reaction with an activation energy of 185kj/mol was run at 455k and again at 475 . What is the ratio of f at the higher temperature of f at lower temperature? one significant figure
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