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A rigid vessel 10(ft)3 in volume contains saturated-vapor steam at 75(psia). Heat exchange with a single external heat reservoir at 60(ºF) reduces the temperature of the contents of the vessel to 60(ºF). Determine ΔStotal. What is the irreversible feature of this process?
280 mL of an HCl solution with pH of 3.10 is added to 200 mL of an HNO3 solution. The resulting pH is 1.4. What was the pH of the original HNO3 solution.
predict whether an aqueous solution of ammonium bicarbonate would be acidic, basic or netural. explain your answer, and support it with real data.
Assuming that one serving size of juice is 240ml. calculate the mg of witamin c in one seving size of the juice. vitamin c, raw juice 0.643 mg/ml
3 5L flasks fixed with pressure gauges and small valves, each contain 4 g of gas at 273K. Flask A has H2, B has He and C has CH4. Place in order of pressure
2H2(g) + O2(g) --> 2H2O(l), delta H = -572 kJ. How much heat is evolved when 4.03 g of hydrogen is reacted with excess oxygen
In a chemical reaction two water-soluble ionic substances react to form an insoluble solid precipitate in a metathesis reaction. Would you expect DS to be positive, negative, or close to zero for this reaction
Sleeping pills often contain barbital, which is weakly acidic (pKa = 8.00). For analysis of the barbital content of a sleeping pill, a titration is carried out with strong base. It takes 12.00 mL of 0.200 M base to reach the stoichiometric point.
Explain when light hits the AgCl particles the subsequent reaction occurs AgCl + hv -> Ag + Cl. The silver metal that is outlined causes the lenses to darken. The enthalpy change for this reaction is 3.10 x 102 kj/mole.
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.48. Compute the pH at each of the following points in the titration of 50.0mL of a 0.80 M B(aq) with 0.80 M HCL(aq).
Why we have a decrease in in the volume of the crude organic product during the extraction with HCl. What causes this decrease
A 250-L tank is evacuated and connected to a 50.0-L bulb filled with compressed argon. After they are joined, the pressure in the bulb falls to 2.20 atm. If the temperature remains at 25 °C throughout the process, what was the initial pressure in ..
in the procedure for determining the fragrances it suggests that the organic layer dropped onto the watch glass should
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