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0.25 g of CuSO4 was added to 25 mL of deionized water. What wavelength of light would you recommend to characterize the solutions UV-Vis absorbance? Assuming that at this wavelength, the molar absorptivity of CuSO4 is 1.8 M/cm and the path length is 1 cm, calculate the percentage transmittance of the measured solution.
A piece of copper with a mass of 218 grams has a heat capacity of 83.9 J/degrees C. What is the specific heat of copper.
Obtain from a reference work the solubility of silver acetate at 20 degree C. Usually this will be reported in units of grams per 100 mL of water
An open flask contains .200 mol of air. Atmospheric pressure is 745 mm hg and room temperature is 68 degrees Fahrenheit. How many moles are present in the flask when the pressure is 1.10 ATM and the temperature is 33 degrees Celsius
Balance the following redox reactions (the elements undergoing a change in the oxidation number are in bold + italics). For each reaction above, identify the oxidizing reagent and the reducing agent.
Which pair of ions would not be expected to form a precipitate when dilute solutions of each are mixed?
Assume equal concentration rank these solution by PH : HBrO(aq), Sr(OH)2 (aq)
the activation energy is 18 kj/mol and the overall delta E is -136 kj/mol. How times faster will the reaction occur at 50C than at 0C for the forward reaction
Question- An unknown gas effuses at a rate that is 0.85 times that of oxygen gas. What is the molar mass of the unknown gas
Use the Rydberg equation to calculate the wavelength (in Å) of the photon absorbed when a hydrogen atom undergoes a transition from n = 1 to n = 5.
How many moles of potassium hydroxide are needed to completely react with 6.94 moles of aluminum sulfate according to the following equation
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 350C
Ethanol (CH3CH2OH), the intoxicant in alcoholic beverages, is also used to make other organic compounds. In concentrated sulfuric acid, ethanol forms diethyl ether and water
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