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A 2.634g sample containing impure CuCl2 *2H2O was heated. The sample mass after heating to drive off the water was 2.125g. What was the mass percent of CuCl2 * 2H2O in the original sample?
Calculate the concentration of the dye in solution C in units of moles per Liter Kool Aid Solution, i have a molar absorptivity of 2.41x10^4 L/mol-cm analytical wavelength of 505nm molecular weight of 496.42g/mol, absorbance of 1.528
The pH of blood is 7.35. It is maintained in part by the buffer system composed of carbonic acid (H2CO3) and the bicarbonate (hydrogen carbonate, HCO3-) ion. What is the ratio of [bicarbonate]/[carbonic acid] at this pH
what is the potential of the corrosion reaction under the above conditions at 298 K? Calculate the potential of the Pb/Pb(IO3)2 electrode in a 0.00810 M solution of NaIO3.
A polluted water sample is suspected of being contaminated with one of the following; soap, ABS Surfactant, or LAS. In soft water, the sample has a very high BOD relative to its TOC.
The product of acetylation of ferrocene are acetylferrocene and di-acetylferrocene. Why does the first and second acetyl group end up on different ferrocene rings. Explain why the organic rings in ferrocene are aromatic.
a 4.50-g sample of licl at 25.0 degc dissolves in 25.0 ml of water also at 25.0 degc . the final equilibrium
Water from a 5-mL pipet was drained into a weighing bottle whose empty mas was 9.974 g to give a new mass of 14.974 g at 26 degrees celcius. Find the volume of the pipet
What ions are in these solutions. cold tap water, 0,9 % NaCl (aq), 0,1 M acetic acid, 0,1 M HCl, 0,1 M NaC2H3O2 (aq), 0,1 M ammonia.
The surface area of an object to be gold plated is 49.7cm2 and the density of gold is 19.3g/cm3. A current of 3.25A is applied to a solution that contains gold in the +3 oxidation state. Calculate the time required to deposit an even layer of gold..
What is the minimum volume (in mL) of 5.96 M HCl needed to prepare 513.0 mL of dry chlorine when the gas is obtained at 28.6 degrees celcius and 763 torr
A typical aspirin tablet contains 324 mg of aspirin (C9O4H8), a monoprotic acid with a Ka= 2.8x10^-4. A monoprotic acid donates a single proton. If you dissolve two aspirin tablets in a 300 mL glass of water, what is the pH of the solution
The mechanism by which these compounds kill insects and people is unknown. D. These compounds kill insects and people by stimulating acetylcholinesterase, an enzyme of the nervous system.
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