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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
A sample of commercial hydrogen peroxide solution was analyzed using the procedure in this experiment. the results from three determinations were 3.03% ,2.89% and 3.22%
Briefly explain why you can make the assumption that all of the SCN- ion in solutions S2-S6 has been converted to FeNCS^2+ ion.
The decomposition of NO2 by the following reaction at some temperature proceeds at a rate 5.40 x 10-5 mol NO2/L.s when [NO2] = 0.01144 mol/L.
the half life increased from 2.0 min to 4.0 min at 25C. Calculate the the order of the reaction and the rate constant.
Suppose that a certain biologically important reaction is quite slow at physiological temperature (37 degrees C ) in the absence of a catalyst.
what is the concentration of oxygen in air-saturated water at 25 degrees C and .85 atm? Assume that the mole fraction XO2 is .209 and Henry's law constant for oxygen
Predict the product(s) and write a balanced equation for the following redox reaction: (include state os matter) pentane(C5H12) + oxygen >
Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion goes to heat the water (the rest is lost to the surroundings); the density of the fuel is 0.78 g/mL; the initial temperature of the w..
Potassium metal reacts with water to give potassium hydrozide and hydrogen gas. If 50.0 mL of hydrogen gas is produced at STP, what is the mass of potassium that reacted? 2 K9s) + 2H2O(1) -2KOH(aq) + H2(g)
Calculate the mass of sugar (C12H22O11) that must be dissolved in 700 g of water to prepare 20% sugar solution
How many moles of Chromium(II) bromide, CrBr_2, are present in a sample that contains 2.52 moles of bromide ions.
Compare and describe the 2 different definitions of acids and bases. Explain the difference between a weak acid and a stronge one
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