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When a 9.15-g sample of solid ammonium nitrate dissolves in 58.4 g of water in a coffee-cup calorimeter (see above figure) the temperature falls from 21.00 oC to 10.88 oC. Calculate H in kJ/mol NH4NO3 for the solution process. NH4NO3(s) NH4+(aq) + NO3-(aq) The specific heat of water is 4.18 J/g-K. Hsolution = kJ/mol NH4NO3.
A cylinder contains 12.0l of air at a total pressure of 41.4psi and a temperature of 30c. How many moles of gas does the cylinder contain
The equilibrium constant is 100. Calculate the concentrations of O2 present at equilibrium
A 25.00 mL portion of 0.100M Ag+ is added to a solution containing 0.0010 mole of Cl-. This solution is then titrated with 0.0500M SCN- to the end point. Calculate the volume of SCN- is required for the titration.
Calculate the root mean square velocities of Cl2(g) and O2(g) molecules at 263 K and 505 K.
A reaction mixture initially contains .56 atm CO2 and .32 atm CO. what is the equilibrium pressure of CO
Calculate the concentration of solution containing one mole of phophate per litre
What mass of aluminum metal can be produced per hour in the electrolysis of a molten aluminum salt by a current of 21 A?
Assuming efficiency of 26.70 %, calculate the actual yield of magnesium nitrate formed 139.4 g of magnesium and excess copper (II) nitrate. Mg + Cu(NO3)2 -> Mg (NO3)2 + Cu
Write net ionic equations for each of the precipitation reactions used to identify each of the cations in Group A (Al3+, Fe3+, and Mn2+) and B (Ba2+, Ca2+, and Mg2+).
what are the main sources of error in a calorimetry experiement. describe at least three errors.
Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
Calculate the solubility-product constant for PbCrO4. Ksp = (c) The Ksp of Tl2S at 25 oC is 6.00e-22. What is the molar solubility of Tl2S? solubility = mol/L
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