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The standard enthalpy change for the dissolution of ammonium nitrate is shown below. If 8.2 grams of solid ammonium nitrated is dissolved in 115.0 grams of water at a temperature of 21.0 degrees C, what will be the final temperature of the solution? You may assume that the specific heat of the solution is the same as the specific heat of pure water (4.184 J/g degrees C) and the calorimeter itself absorbes no heat.
NH4 NO3 -> NH4 +NO3
If 3.93 g of sodium borohydride contains 2.5 × 10e23 H atoms, how many moles of H are present in 33 cm3 of sodium borohydride (of density 1.074 g/cm3)?
A gas containing H2S and CO2 is bubbled through methanol at 4 degrees C. From the bottom of the tank to the top, 80% of the H2S is absorbed by the methanol.
How many grams of NaOH must be weighed to prepare 1.50 L of an aqueous solution of 3.75 M NaOH. The mass of NaOH is ___x10^__ g
Calculate the pH of 0.103 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10^-3, Ka2 = 6.2 x 10^-8, and Ka3 = 4.8 x 10^-13.
what does the equation (particularly the products) for 2-chloro-2-methylpropane and 2-bromo-2-methylpropane look like? The solvents are acetone, isopropyl, and ethanol.
A mixture of neon and oxygen gases at a total pressure 975 mm Hg contains neon at a partial pressure of 325 mm Hg. If the gas mixture contains 3.75 grams of neon,
The value of ?Ho for the reaction below is -126 kJ. The amount of heat that is released by the reaction of 25.0 g of Na2O2 with water is ________kJ. 2Na2O2 (s) + 2 H2O (l) -> 4NaOH + O2 (g)
epsom salts are hydrates of magnesium sulfate. the formula for epsom salts is mgso4 . xh2o. a 7.834g sample is heated
find the volume of oxygen.1.calcium carbonate forms limestone one of the most common rocks on earth. it also forms
5 ml of a 0.002m solution of hcl is dissolved in 0.5 liters of water. what is the concentration of h3o ions in the
derive Raoul's law using the chemical potentials of the constituents that make up the mixture of the solution.
1. How to use Lewis electron-dot symbols to depict main-group atoms and ions
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