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1. Suppose that you are going to collect H2 gas produced from the reaction of an acid with a metal such as zinc. This reaction gives off heat, so the tem perature of the solution will increase as the reaction proceeds. You need to know the partial pressure of the H2 you generate as precisely as possible What will you need to account for in your calculation? What things would you need to measure to make accurate calculations? What information would you need to look up?
2. Three acid samples are prepared for titration by 0.066040 M NaOH. Sample 1 is prepared by dissolving 0.015 mol of HCl in 50 mL of water. Sample 2 is prepared by dissolving 0.015 mol of HCl in 60 mL of water. Sample 3 is prepared by dissolving 0.015 mol of HCl in 40 mL of water. Rank the concentratio n of the three solutions, from highest to lowest. When the titration is performed, which sample, if any, will require the largest volume of 0.066040 M NaOH for the neutralization? Explain your answer.
3. What volume of 12.4 M HCl is needed to make 250 mL of 7.7040 M HCl
Calculate delta E for the combustion of a gas that releases 195.0 kJ of energy to its surroundings and does 54.5 kJ of work on its surroundings.
If a solution of sea water was found to have a molarity of .26 m, what is the new freezing point of this water? (Kf = 1.86 degrees C/M)
What volume will 135 g of butane occupy at 745 torr and 35 C?
multiple choice questions in organic chemistry.1.nbspnbspnbspnbspnbspnbspnbsp 1.nbspnbspnbspnbspnbspnbspwhich of the
State the composition and the properties of the ketohexose derived from fruit jam. Describe the manner in which ketohexose acts as a reducing sugar in the test.
when cyclopentane is exposed to br2 in the presence of light reaction occurs. write the formulas of all possible
Use the cell potential for the Pb-PbI2 cell and the known [Pb2+] to calculate the [Pb2+] in equilibrium with PbI2.
Draw the structure(s) of the carboxylic acids with the molecular formula C5H10O2 that contain a branched carbon chain.
silica gel columns having smaller particle size procedure more effective chromatographic separations
An ideal gas enters a valve at 500K and 3MPa at a steady state rate of 3 mol/min it is throttled to 0.5 MPa. What is the rate of entropy genration. Is the process reversible.
CO exhibits an infrared absorption band at 2143 cm^-1 that is attributed to the symmetric stretching transition. Assuming this corresponds to a transition from the v=0 to v=1 vibrational quantum number
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25°C.
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