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suppose 25.00 mL of 0.100 M HCl is added to an acetate buffer prepared by dissolving 0.100 moles of acetic acid and 0.110 moles of sodium acetate in 500 mL of solution. What are the initial and final pH's? What would be the pH if the same amount of HCl were added to the 125 mL of pure water? The Ka of acetic acid is 1.8*10^-5
What is the expected freezing point of an aqueous solution of 2.62 kg of nitric acid, HNO3 , in a solution with a total mass of 5.91 kg? Assume that the nitric acid is completely ionized.
A 97 gram solution of silver nitrate contains 14 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
What is the minimum amount of Tc-99 that must be shipped in order for the lab to receive 10.0 mg? Show you working please
how many heat energy is required to heat a cup of water (195.0) from room temperature (25.0C) to boiling (100.0C).
Calculate the equilibrium constant, Ke, for the reaction assuming the concentrations for reactants and products are the following
If the temperature in the laboratory is 22.7oC and the atmospheric pressure is 0.966 atm, what volume would be occupied by the carbon dioxide produced in this reaction (in cm3)?
What is the molar mass of a compound if one mole of the compound contains two moles of oxygen atoms, 6.022 x 10^24 hydrogen atoms, and 60.05 grams of carbon?
When N2O5 (g) is heated it dissociates into N2O3 (g) and O2(g) according to the following reaction: N2O5(g) N2O3(g) + O2(g) Kc= 7.75 at a given temperature. The N2O3(g) dissociates to give N2O(g) and O2(g) according the following reaction:
A graduated cylinder contains 152 mL of water. A 14.0 g piece of iron (density = 7.86 rm{g/cm^3}) and a 16.0 g piece of lead are added. What is the new water level in the cylinder?
Using the calibration data provided below, calculate the concentration of cocaine (mg/mL) in the original urine sample.
The osmotic pressure,pie , of a solution of glucose is 83.1atm . Find the molarity of the solution at 298k .
Using Gas Chromatography results and mass of your product mixture, calculate the percent yields of both 1-Hexanol and 2-Hexanol.
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