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Calculate the corresponding Bohr's orbit radius. - Calculate and compare the probabilities for the electron to be at distances larger and smaller than this value.
Gas chromatography. Answer the following questions about retention times of the following compounds. Given naphthalene (boiling point = 218 degrees C)
A slightly bruised apple will rot extensively in about four days at room temperature (25oC). If it is kept in a refrigerator at 4oC, the same extent of rotting takes about fifteen days. How long wou
In an experiment, 0.500 L of 0.020 mol L ^-1 NaOH(aq) is rapidly mixed with an equal volume of 0.020 mol L^-1 HCN(aq). Calculate the time, in seconds, required for this [OH] to decrease to 1.0×
Zinc dissolves in acid according to the balanced reaction: Zn(s) + 2H^+(aq) -> Zn^2+(aq) + H2(g) A sample of zinc is placed in the ice calorimeter. If 0.0657g of zinc causes a decrease of 0.109mL
A coin dealer, offered a rare silver coin, suspected that it might be a counterfeit nickel copy. The dealer heated the coin, which weighed 18.0 g to 100°C in boiling water and then dropped the h
Suppose 250.0 mL of 1.00 M HCl and 250.0 mL of 1.00 M NaOH, both initially at 21.0°C, are mixed in a thermos flask. When the reaction is complete, the temperature is 27.8°C. Assuming that th
A home swimming pool contains 155 m3 of water. At the beginning of the swimming season, the water must be heated from 18 to 32°C. How many joules of heat energy must be supplied
Consider a perfect gas with Cvm = 28.0 J/mol-K trapped in a piston/cylinder arrangement with cross-section area of 250.0 cm^2. The gas expands irreversibly against a fixed external pressure of 1.0 a
What are the percetages of each compound. Namphthalene = 17 cm^2 Phenol = 38cm^2 Toluene= 4 cm^2 question E) Calculate the retention times for th following componnts from teh following information.
In running column chromatography under the following conditions, you get results that are less than ideal. Consider the situation in each case and suggest a correction.
Gas chromatography. Answer the following questions about retention times of the following compounds. Given naphthalene (boiling point = 218 degrees C), phenol (boiling point =181.7 degrees
Determine the concentration, in moles per liter, to which the hydroxide concentration must be raised to produce a concentration of 0.200 mg/L of copper if the starting concentration is 2.00 mg/L. Es
Calculate the molar concentration of HCl in a solution that has a specific gravity 1.185 and is 36.5% (w/w). Prepare from this bottle 1 L of 0.1 HCl solution.
What is the Hydrolysis equation for NaHSO4 and how do you calculate the Ka and Kb without looking it up with a pH of 0.81. Would solid benzoic acid dissolve in a solution of baking soda NaHCO3
Find Delta E(rxn) for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.86 kJ/degrees Celsius.
A solution contains .10 M iodide ion, I- and 0.10 M carbonate ion, CO32-.... a. If solid Pb(NO3)2 is slowly added to the solution which salt will precipitate first, PbI2 or PbCO3? What will the conc
What mass of carbon dioxide is produced from the complete combustion of 6.20×10?3 of methane
What is the [H3O+] in a solution that has a pOH of 2.29? Use E notation and 3 significant figures. Is the solution 1.95X10^12? show me how you got it as well
Provide a stepwise mechanism for the reaction, showing all electron movement using the curved arrow convention. Sketch a qualitative energy level diagram for the mechanism labeling all relevant poin
Use the data below to calculate the value of Kc H2(g) <=> 2 H(g) Kc = 0.00473 1/2 H2(g) + 1/2 O2(g) <=> OH Kc = 0.643 Give your answer to 3 significant figures
Ammonium carbamate (NH2COONH4) is found in the blood and urine of mammals. At a temperature of 511 K, Kc = 0.056 for the following equilibrium: NH2COONH4(s) <=> 2 NH3(g) + CO2(g). If 10.2 g of
In the reaction below, 6.76 atm each of Cl2 and I2 were placed into a 1.00 L flask and allowed to react: Cl2(g) + I2(g) <=> 2 ICl(g) Given that Kc = 45.9, calculate the equilibrium pressure of
How many moles of H3O+ must be added to one liter of a solution to adjust the pH from 7.48 to 5.90?