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A sample of 10.1 g ammonium nitrate, NH4NO3, was dissolved in 125.0 g of water in a coffee-cup calorimeter. The temperature changed from 24.5 deg C to 18.8 deg C. Calculate the heat of solution (i.e., delta H of solution)of ammonium nitrate in kJ/mol. Assume that the energy exchange involved only the solution and that the specific heat of the solution is 4.18 J/g. deg. C. Show work or include as much explanation as needed for this calculation.
When measuring horse radish peroxidase you found that a purified preparation has a specific activity of 10mmolar/sec/mg protein. suppose you added to an assay a competitive inhibitor that would not produce a colored product.
You have a 50.00mL sample of .287 M alanine. What will be the pH of the solution be after it is titrated with 39.14 mL of .550 M NaOH
A 0.2042 g sample of KHP (MM=204.2) is dissolved in 25 ml of water. If 20.45 ml of NaOH solution is required to reach the equivalence point, what is the normality of the NaOH solution
In the following reaction, Zn (s) + CuSO4 (aq) ? ZnSO4 (aq) + Cu (s) What is the reducing agent and what is the oxidixing agent
The density of the sample is 1.01 g/mL. The titrant is 1.017 M NaOH. The average volume of titrant required to titrate 25.00 mL subsamples of the vinegar is 20.78 mL. What is the concentration of acetic acid in the vinegar? Express your answer the..
Consider the following heterogeneous equilibrium: CCl4(g) ñ C(s) + 2Cl2(g) . Kp = 0.80 atm for this reaction at some elevated temperature. Calculate the initial partial pressure of CCl4(g)
The mass percentage of hydrochloric acid within a solution is 10.00%. Given that the density of this solution is 1.049 g/mL, find the molarity of the solution.
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium. Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC.
Calculate Delta mixG, Delta mixS, and Delta mixH for mixing 150.0 g of benzene with 200.0 g of toluene at 20 degree C and 1 atm.
When 25.0 g of ethanol vapor condenses, 23.6 kJ of heat is released. How much heat is required in kJ to vaporize 262 g of ethanol?
At a certain temperature, the pH of a neutral solution is 7.45. What is the value of Kw at that temperature
Calculate the density of hydrogen sulfide gas, H2S, at 60.°C and 953 mmHg. Obtain the density in grams per liter.
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