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Explain why iodination occurs preferentially ortho to the hydroxyl group of the ring. What is the role of each reactants (NaI, and NaOCl) in this transformation?
Benzoyl chloride, C6H5COCl, reacts with water to form benzoic acid, C6H5COOH, and hydrochloric acid. This first-order reaction is 25% complete after 26 s. How much longer would one have to wait in o
Which of the following ground state ions is/are diamagnetic?
Which of these ground-state, gaseous ions has the largest number of unpaired electrons?
At a particular temperature the first-order gas-phase reaction N2O5 -----> 2NO2 + (1/2)O2 has a half-life for the disappearance of dinitrogen pentoxide of 5130 s. Suppose 0.450 atm of N2O5 is intro
When acetaldehyde at a pressure of 364 mmHg is introduced into an evacuated 500. mL flask at 518°C, the half-life for the second-order decomposition process, CH3CHO ----> CH4 + CO, is 410. s.
An isotope of sodium 24Na, has a half-life of 15 hours. A sample of this isotope has mass 2 g. Use a graph to estimate the time required for the mass to be reduced to 0.01 g.
At a particular temperature the first-order gas-phase reaction N2O5 ----> 2NO2 + (1/2) O2 has a half-life for the disappearance of dinitrogen pentoxide of 5130 s. Suppose 0.450 atm of N2O5 is intro
What is the percent ionization of a solution prepared by dissolving 0.0223 mol of chloroacetic acid, HC2H2O2Cl) in 1.80 L of water? For chloroacetic acid, Ka = 1.4 ? 10-3.
Suppose part of this solution is then diluted to prepare 500.0ml of .200M. What volume of water was added to the original solution to prepare the diluted solution.
0.11 g of a monocarboxylic acid is neutralized by 12.5 mL of a 0.1 N sodium hydroxide solution. What is the molecular weight of the acid?
Calculate the molar heat of vaporization of a substance given that 0.383 mol of the substance absorbs 24.1 kJ of energy when it is vaporized.
Calculate the volume of hydrogen that should form from the mass of aluminum used in this experiement? The mass of aluminum is 2.004 grams.
The complete combustion of 1.076g of C9H8O in a bomb calorimeter ( Cccalorimeter=3.895 kJ/ degree C) produced an increase in temperature of 11.21C. Calculate the molar enthalpy of combustion in kJ/
If the total pressure in the flasks is 306 torr after the stopcock is opened, determine the intial pressure of N2 in the 1.00 L flask?
What are the molecular (formula) masses of the following substances? Express your answer using one decimal place.
The activation energy for the reaction O + O3 ? 2O2 is 25 kJ/mol, and the enthalpy change is ?H = -388 kJ/mol. What is the activation energy for the decomposition of O2 by the reverse reaction
An experiment shows that a 249 -mL gas sample has a mass of 0.433 g at a pressure of 750 mm Hg and a temperature of 29?. What is the molar mass of the gas?
If all the energy obtained from burning 1.28 pounds of butane(fuel value is 10.85Kcal/g) is used to heat 123.0kg of water at an initial temperature of 18.7 C, what is the final temperature?
Calculate the concentration (M) of sodium ions in a solution made by diluting 70.0 mL of a 0.274 M solution of sodium sulfide to a total volume of 400 mL.
What is the molar concentration of a solution of sulfuric acid, H2SO4, if 9.11 mL react completely with 0.254 g of NaOH which was dissolved in 200 mL of water?
Exactly 18.9 mL of water at 26.0 C are added to a hot iron skillet. All of the water is converted into steam at 100C. The mass of the iron skillet is 1.35kg and the molar heat capacity of iron is 2
What is the partial pressure of argon, P_Ar, in the flask? What is the partial pressure of ethane, P_ethane, in the flask?