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How many moles of urea must be dissolved in 71.6 grams of water to give a 2.4 m solution?
Write balanced net ionci equations for the following electrolysis reactions using platinum electrodes 1. aquos potassium fluoride
Which of the following would be the best procedure for extracting acetaldehyde from an aqueous layer to the organic layer? a. Extracting the aqueous layer one time with 200 mL of the organic solvent.
A reaction with the activation energy Ea= 166.00 kJ/mol, has a rate constant k = 3.900 x 102 at 329.00 Kelvin. Determine the rate constant when the temperature is changed to 693.00 Kelvin. R = 8.314 J K-1mol-1
Name and list the functions of the prosthetic group(s) associated with a) HDLs , b) interferons, c) viruses , and d) hemoglobin
What is the absolute error in mL associated with a 25 mL burette, and what is the relative error % when a 3.25 mL volume is measured with the 25 mL burette
A round plate having a diameter of 30.0 cm is being silver plated on one side, by electrolysis of silver nitrate, where the plate is the cathode
Suppose Joule encountered the waterfall at Niagara Falls. Calculate the height if the temperature difference between the top and bottom of the waterfall is 0.20° F.
An acid solution was standardized against NaHCO3 which was prepared as 75 g NaHCO3 in 1 Liter. Find the Normality of the acid if 28 ml was required to decrease pH to 4.5 if volume of NaHCO3 used in titration was 0.1 Liters.
The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If energy obtained from burning 1.23 pounds of butane (feul value is 10.85 kcal/g) is used to heat 126.5 kg of water at an initial tempe..
if you used 8900 kilojoules you expend in energy in one day to heat 49000g of water at 19 C what would be the rise in temperature.
You are given 2.56 g of salicylic acid. Using the procedure in the lab manual for the synthesis of aspirin, you recover 0.89 of aspirin. Calculate your percent yield of aspirin
Calculate the change in molar enthalpy and molar internal energy when carbon dioxide is heated from 15 degrees Celsius to 37 degrees Celsius
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