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Using standard molar entropy values, calculate delta standard molar entropy values for the following reactions. In each case account for the sign of delta standard molar entropy.
(a) C2H4(g) + H2(g) -> C2H6(g)(b) N2O4 -> 2NO2(g)(c) Be(OH)2(s) -> BeO(s) + H2O(g)(d) 2CH3OH(g) + 3O2(g) ->2CO2(g) + 4H2O(g)
how many moles are present of an ideal gas at the following conditions: 1.0 atm, 25.0 C, and occupying 22.4 L, The Lewis structure for PF3 shows that the central phosphorus atom has _______ nonbonding and
At 25 degree C the heat of fusion of Al is 10.6 kJ/mol and the heat of sublimation is 326.4 kJ/mol. What is the heat of vaporization of Al at 25 degree C.
The following choices list some common laboratory solvents. In which of these solvents would LiCl be the LEAST soluble
Calculate the concentrations of all species in a 1.75 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
How many moles of HIO3 are produced when 1.29 grams of ICl3 and 7.81 grams of H2O react
followed by acidification, gives compound Z with molecular formula C4H6O4, CH3CO2H and CO2. Both X and Y are optically active, while Z is optically inactive. Propose structures for X, Y and Z that are consistent with these data.
Several rate constants were measured for a particular reaction at several temperatures. It was found that k = 0.0173 at 923 K, and k = 0.00919 at 773 K. What is the activation energy, Ea , for this reaction?
Titanium (w=6.94x10^-19J) and silicon (w=7.77x10^-19J) surfaces are irradiated with UV radiation with a wavelength of 217nm. What is the wavelength of the electrons emitted by the titanium surface
what is the quantity in grams of formic acid and sodium formate necessary to make 500 mL of a buffer that has a formic acid concentration of .75 M and a sodium formate concentration of .75 M?
Describe how biological membranes are organized: what roles do lipids and proteins play in this organization
a cell depositing Cu from a Cu2+ bath operates for 10 hours with an average current of 5.8 A. if 65.3 g of copper is deposited, at what efficiency is the cell operating?
Given the following balanced equation: TiCl4 + 4NaH --> Ti + 4NaCl + 2H2. How many grams of NaCl will be produced from 15.0 g TiCl4 by using sufficent NaH
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