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Consider the solubility of the slightly soluble salt A(OH)2 are allowed to equilibrate, one at 25 degrees Celsius and the other at 80 degrees Celsius. A 15.00 mL aliquot of each solution is titrated with 0.270 M HCl. 10.55 mL of the acid is required to reach the endpoint of the titration at 25 degrees Celsius, while 54.95 mL are required for the 80 degrees Celsius solution. Calculate the Gibbs Free Energy (in kJ/mol) at the higher temperature.
53.5 g of an ideal gas of molecular weight = 10.5 g/mol is confined at a pressure of 50 kPa. The density of the gas is 0.164 g/L. Compute the temperature of the gas in degrees Celsius.
Determine the mass of acetamide present per kg of water if the freezing point of this solution is 0 °C. (The freezing point of pure water is 0°C (exactly) at 1 atm pressure and the molal freezing-point-depression constant for water is 1.86°C/m.)
A mixture of 13.1 grams of Zn and 22.0 g I2 is reacted to completion in a closed, evacuated container. What are the contents of the contianer after this reaction
assume you dissolve .297 g of the weak acid benzoic acid in enough water to make 105 ml of solution and then titrate
A point mass rotates in a circle with l = 2. Calculate the and the possible projections of the angular momentum on an arbitrary axis.
Solid CrF3 contains a Cr(III) ion surrounded by six F- ions in an octahedral geometry all at distances of 190 pm. However, MnF3 is in a distorted geometry with Mn-F distances of 179,191, and 209 pm (two of each).
A certain reaction has an Eact of 62.3 kj/mol (14.9 kcal/mol) and a frequency factor of 7.15X10^8LXmil-1Xsec-1. use the arrhenius equation to calculate the rate constant for this reaction at 35 degrees c
A latex balloon, inflated to an excess pressure of 1kPa and a radius of 30cm, is attached to a smooth nozzle, initially stoppered. The stopper is removed, and the balloon deflates in 5 seconds.
calculate the mass of water that must be added to 0.45 mol of glucose to make a solution of 15.0 percent by mass. the molar mass of glucose is 180 g/mol
Calculate the pH of a solution made by mixing 2.0 M HF and 2.0 M HCN. Also calculate the concentration of CN- ion at equilibrium.
What pair of elements would you expect to exhibit the greatest similarity in physical and chemical properties? WHY?
Calculate the standard molar enthalpy of formation ?H°f of N2H4(g) from the following information: N2(g) + 2H2(g) ? N2H4(l) ?H°rxn = +50.6 kJ N2H4(g) ? N2H4(l) ?H°rxn = -44.8 kJ A. +5.8 kJ/mol B. +95.4 kJ/mol C. +47.7 kJ/mol D. -95.4 kJ/mol E. -5...
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