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The pKa of benzoic acid and 4-nitroanilinium hydrochloride are 4.2 and 1.0, respectively. a.) Determine the Keq for the reaction of benzoic acid with 4-nitroaniline.
What are the advantages and disadvantages of natural products as lead compound? What is meant by target specificity and selectivity? Why is it important?
What mass ratio of sugar (C12H22O11) to water is required to raise the boiling point of the sugar/water solution to 140.1oC?
Three gases (8.00 of methane, CH4, 18.0 of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 degrees Celsius, the total pressure in the container i
Calculate the amount of energy in kilojoules needed to change 117g of water ice at -10degrees Celcius to steam at 125 degrees Celcius.
The equilbrium constant for the decompositon at 25 degrees C is 2.3 X 10 ^ -4. At 25 degrees C , 7.5 g of NH4CO2NH2 is sealed in a 10 L flask and allowed to decompose.
A 5.00 L volume of ethane gas is heated from 298 K to 596 K. If the pressure remains constant, what is the final volume?
The solubility product constant, Ksp, for calcium carbonate at room temperature is approximately 3.0 *10-9. Calculate the solubility of CaCO3 in grams per liter under those conditions.
When 56.6 g calcium and 30.5 g nitrogen gas undergo a reaction that has a 90.0% yield, what mass of calcium nitride forms?
Suppose 30.4 g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.
WHen 1 gram of nitroglycern, C3H5(NO3)3, decomposes to form nitrogen gas, oxygen gas, gaseous carbon dioxide, and liquid water, 1.9 kcal of heat is evolved.
5000 joules of energy are added to 108 grams of silver, Ag, at 20°C. What is the final temperature of the metal? (the specific heat of silver is 0.235)
Calculate the amount of energy in kilojoules needed to change 135 of water ice at 10 to steam at 125 . .... How many liters of water can be made from 55 grams of Oxygen gas and an excess of Hydrogen a
How many milliliters of a stock solution of 2.00M KNO3 would you need to prepare 100.0 mL of 0.150M KNO3?
What mass of Sodium Hydrogen Carbonate (Sodium Bicarbonate) are required to completely react with(neutralize) 2.5 moles of Hydrochloric Acid (HCl).
A sample of gas occupies 721 mL at 1.00 atm. The pressure is increased to 1.1 atm (the temperature stays the same). What is the new volume of gas in mL?
What is the energy of light that is emittted by one iron atom during its decay from an excited state to a ground state and has the wavelength 248.3 nm? What is the frequency of this light in MHz?
If the partial pressure of NO is decreasing at the rate of 32 torr/min, what is the rate of change of the total pressure of the vessel?
Given that the enthalpy of formation is -277.7 kJ/mol for C2H5OH(l) and -393.5 kJ/mol for CO2(g), find the enthalpy of formation for C6H12O6.
How much heat is required to warm 215 g of ice from -44.1°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
How many grams of asprin were lost in the washing process you used to purify your product, assuming you used 50mL if water for washing?
Calculate the enthalpy change, Delta H, for this reaction per mole of X. Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 J/g and 1.00 g/mL and t
Nitrogen is contained in a 300 ml vessel at 400 mm Hg and 10°C. How many grams of nitrogen are in the vessel?
Water and solids are drawn from the bottom of the tank at a rate of 14,000 gal/hr. How long will it take before the solids concentration in the tank is 0.2 lb/gal?
A mass of solid aluminum is at its melting point. what is the maximum mass of this sample that can be melted by 120 kJ of heat? ( Cp=0.900J/gc ; Hfus= 35.7 KJ/g