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Chemistry-Energy Rates and Review
When 13.4g of ammonium chloride dissolve into 2.00x102g of water the temperature changes from 20.0°C to 15.3°C. Determine the molar enthalpy of solution of ammonium chloride and a balanced thermochemical equation for the reaction. Sketch an enthalpy diagram for this reaction. (Ans: +16.7kJ/mol)
A flow chart to find metals in a solution, but I am having problems writing step by step instructions on how to do each step. I need to write steps on how much to add of HCl, NaOH, NH3, when to centrifuge, when to wash solution, when to decant, how t..
Calculate the heat capacity of a calorimeter if the combustion of 5.000 g of benzoic acid led to a temperature increase of 24.153 degrees Celsius. The heat of combustion of benzoic acid is 26.38 kJ/g.
Suppose 41.19 g of sulfuric acid is mixed with 10.75 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction.
What is percentage purity of H2O2?(AI=127,AK=39)
Find out the mass of precipitate in grams that forms when 286.7mL of 0.112 M Na2SO4 solution is reacted with excess Ba(NO3)2 solution. Balanced Equation ---> 2Na(NO3) + BaSO4
Problem- Calculate the pH at the equivalence point for the titration of 0.160 M methylamine (CH3NH2) with 0.160 M HCl. The Kb of methylamine is 5.0Ã- 10â€"4.
4.00g of H2SO4 solution was diluted with H2O and added with excess of cacl2, and The washed and dried precipitate of BaSO4 weighted 4.08g. Calculate percent H2SO4 in the original acid solution.
Nevertheless, in order to prevent tooth decay, F - ions are added to drinking water at a concentration of 1 mg of F - ion per L of water. How many kilograms of sodium fluoride would be needed to treat a 7.11 107 gal reservoir
The final volume is 1.0000 L the Kb value for NH3 is 1.8 x 10^(-5). What is the pH of the final solution?
A saturated solution of an unknown solid reacted with AgNO3 to give a pale yellow precipitate and also reacted with Pb(NO3)2 to give a white precipitate.
Calculate the enthalpy change, change of H, for the process in which 37.1 g of water is converted from liquid at 4.4 degrees C to vapor at 25.0 C.
Calculate (a) the mole fraction of the solute, (b) the number of moles of solute in the solution, and (c) the molecular mass of the solute.
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