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In a coffee-cup calorimeter, 1.80 g of NH4NO3 is mixed with 79.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.61°C. Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol. Please provide answer in kJ/mol
Determine the free energy change associated with the above reaction (you might find it easier to first consider the movement of the two components of the system separately)
how many moles of calcium ions are in 1L of a 2.0M solution of CaCl2
Calculate brightness of a wavelength undergoing Rayleigh scattering.
which of the following chemical combinations of the elements would be most exothermic, Na and Cl
Determine the osmotic pressure (in Torr) for a 50 mL solution containing 30.22 mg of protein with the molar mass
A gas expands and does P-V work on the surroundings equal to 328 J. At the same time, it absorbs 108 J of heat from the surroundings. Calculate the change in energy of the gas.
There are three possible arrangements of atoms and nonbonding pairs of electrons for the AB3N2 geometry. assuming that the effects of the relative strengths of different type of electron repulsions given in the background information
Determine the molarity of the NaOH(sodium hydroxide) solution. In an acid-base titration, 22.13 mL of a sodium hydroxide solution are required to neutralize 24.65 mL of the potassium hydrogen phthalate solution?
A cool solution of sodium nitrite and a solution of the amine in an ice bath. Moderately concentrated hydrochloric acid is added.
Determine the pH of a solution containing A) neglecting activities. B) including activities The solution contains BOTH chemicals
Bacteriorhodopsin is a protein found in Halobacterium halobium that converts light energy into a transmembrane proton gradient that is used for ATP synthesis
why is it important to perform a fractional distallation slowly? what happens if a fractional distallation is done very quickly by rapidly raising
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