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If the same volume of the buffer was 0.330 M in HF and 0.330 M in NaF, what mass of NaOH could be handled before the pH rises above 4.00?
An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope, what mass of the isotope will be left after
Show that delta G^degree= delta H^degree - (T)(delta S^degree). Indicate whether the reaction is spontaneous or not.
The most important commercial process for converting N2 from the air into nitrogen-containing compounds is based on the reaction of N2 and H2 to form ammonia (NH3):
What volume of 0.250 mol/L Ca(CH3COO)3 (calcium acetate) solution should you add to 25.00 mL of 0.500 mol/L CH3COOH to prepare a buffer solution which has a pH of 4. 754?
How many moles of iodine will sublime into a 500mL flask at this temperature? If the volume of the flash is doubled at constant temperature, what will happen to the equilibrium vapor pressure of I2?
The radioisotope argon-41 is used to measure the rate of the flow of gases from smokestacks. It is a γ emitter with a half-life of 109.2 minutes. Calculate the fraction of an argon-41 sample
Substance B is composed of small molecules but boils at -188 degrees celsius. Which substance is more likely a polar molecule?
Calculate the molar mass of benzoic acid in the solution based on the boiling point elevation. (kb for CCl4 is 5.03 C/m)
What would be the pressure of the gas sample if the gas is compressed at a constant tempterature to a volume of 5.44 L?
A 1.00 mol sample of A2 and 1.00 sample of B2 are placed into an evacuated 1.00L container at 500K and allowed to reach equlibrium. At equilibrium concentration of A2 is equal to 0.800M. Calculate
By how much will the temperature rise when mg of phenol, C6H5OH (s), is burned in the calorimeter under the same conditions? (ΔcH (C14H10 ,s) = -7061 kJ/mol).
The buffer is diluted by adding enough water to make 1.50 L of solution. What is the pH of the diluted buffer?
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge
What concentration of HCl will have a pH of 3.0? And if sufficient NaOH is added to the HCl the change the pH to 4.0 what fraction of HCl will be titrated?
A mixture of the compounds aluminum oxide and magnesium chloride contains 39.0 g of aluminum oxide and is 49.9 % by mass magnesium chloride. Calculate the mass (g) magnesium chloride in the mixture.
Calibration and collection of equilibrium data are different experiment. Why could you use the calibration curve for getting equilibrium data?
Determine the freezing point depression of a solution that contains 30.7 g glycerin (C3H8O3, molar mass = 92.09 g/mol) in 376 mL of water.
At 500 degrees celsius, cyclopropane rearranges to propene. How many minutes does it take for the concentration of cyclopropane to drop to 0.01 M?
What is the average molecular weight of the mixture? What would be the mass (kg) of a sample containing 25.0kmol of ethyl acetate?
If a closed vessel is charged with 88000.0 Pa of nitric oxide and allowed to react with excess liquid bromine, what is the equilibrium partial pressure of the product?
How does the energy of two photons corresponding to a wavelength of 451 nm (blue light) compare with the energy of three photons corresponding to a wavelength of 704 nm (red light)?
The reaction proceeds via successively faster halogenations at the -position until the 3 H have been replaced. Explain why the first halogenation is the slowest one.
What is the final temprature of 0.1222 mol of a perfect monatomic gas that preform 75 J of work adiabatically if the initial temprature is 235 C?
Hydrogen iodide, HI, is formed in an equilibrium reaction when gaseous hydrogen and iodine gas are heated together. If 20.0 g of hydrogen and 20.0 g of iodine are heated, forming 10.0 g of hydrogen