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The dissolution of ammonium nitrate, NH4NO3, in water is an endothermic process. Since the calorimeter is not a perfect insulator, will the enthalpy of solution for ammonium nitrate be reported as too high or too low if this heat change is ignored? Explain
The amount of calcium in a 15.0-g sample was determined by converting the calcium to calcium oxalate, CaC2O4. The CaC2O4 weighed 12.8 g. What is the percent of calcium in the original sample
carbohydrates that comprises a balanced diet in different body types. What are the effects of the consumption of each of these on the human body.
What is ?, the electromotive efficiency to three significant figures?? Open the hint panel below for the definition of electromotive efficiency. (d) What is the pH of an unknown that gives a reading of 19.6 mV with this electrode at 30°C?
A 32.0 g sample of liquid water at 21.0C absorbs 2276 J of heat energy. What will be the final temperature of the water? The specific heat of liquid water is 4.185 J/gC.
What would be the freezing point for a 0.35m solution of sodium bromide in water? (Hoff factor = 1.75)
A solution is 0.050 M in K2SO4 and 0.050 M in K2CrO4. A solution of Pb(NO3)2 is slowly added to this solution (without much change in volume).
Write the structure of a different product that could have been formed if you used ethanol containing substantial amount of water instead of the absolute ethanol
In a beaker of boiling water, there are many gas bubbles forming throughtout the liquid. What gas comprises the bubbles.
Photochemical chlorination of heptane gave a mixture of monochlorides containing 15% 1-chloroheptane. What other monochlorides are present? Estimate the percentage of each of these additioanl C7H15Cl isomers in a monochloride fraction.
Assume you 0.010 mol of N2O4 (g) in a 2.0L flask at 50 degrees Celcius. After the system reaches equilibrium, [N2O4] is 0.00090 M. What is the value of Kc for this reaction
The alcohol (ethyl alcohol) content of the bottle of beer in a 12 oz is about 5%. Identify the substance produced in the liver that helps catalyze this reaction.
CH3COOH (Ka=1.8x10^-5) was titrated with 0.50 M NaOH. Calculate the pH after addition of 30.0mL of NaOH
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