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A solid material is known to contain potassium biphthalate KC8H5O4 as well as other inert materials. A 3.025 gram sample of this material is dissolved in 100mL water and titrated with .0875 M potassium hydroxide. It takes 23.78mL of KOH solution to reach the end point. Explain how many moles of KOH were used in the titration?
A proton in a linear accelerator has a de Broglie wavelength of 158 pm, What is the speed of the proton?
What is the wavelength of a baseball having mass 100.0 g traveling at a speed of 160 km/hr? What is the wavelength of an electron traveling at the same speed
A liquid unknown was found to be insoluble in water and soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58 Celsius at 670 mm Hg. what is the substance
The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ)
What is the maximum mass of sucralose (C12H19Cl3O8) you can add to 2.50 kg of pure water and still have the solution freeze? Assume that sucralose is a molecular solid and does not ionize when it dissolves in water.
What are the concentrations of HSO4-, SO42-, and H+ in a 0.20 M KHSO4 solution? (Hint H2SO4 is a strong acid; Ka for HSO4- = 1.3x10-2)
A gaseous hydrocarbon reacts completely with oxygen gas to form carbon dioxide and water vapor. Given the following data, determine PH°f for the hydrocarbon
How many liters of water vapor can be produced if 13.3 liters of methane gas (CH4) are combusted, if all measurements are taken at the same temperature and pressure?
The osomotic pressure of this solution was 10.68 torr at 25 degrees C. What is the molecular mass of the protein?
What is the minimum amount of work the fish must do to compress his swim bladder. Derive the appropriate equation.
Assume that the ideal gas law is valid, with T=t(celcius)+a, and that the values of R and a are not known. Determine R and a from the measurements provided.
What is the conjugate base of each of the above? d. Write the reaction for the conjugate base interacting with water. e. Write the Kb expressions for the reaction that involves the conjugate and calculate the actual value.
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