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Fe(s) + 3/2O2(g) + 3/2H2(g) --> Fe(OH)3(s) at constant 25 degrees C and 1atm deltaH for Fe(OH)3(s) are -824.25 kJ/mol S for Fe(s), O2(g), H2(g) and Fe(OH)3(s) are 27, 130.6, 205.0 and 107 J/K mol, respectively. A. Determine the enthalpy change deltaH for the reaction at 298 K B. Determine deltaS surr for the reaction C. Determine deltaS sys for the reaction D. Determine deltaG for this reaction. Will this reaction be spontaneous?
The shielding of electrons gives rise to an effective nuclear charge,Zeff, which explains why boron is larger than oxygen. Estimate the approximate Zeff felt by a valence electron of boron and oxygen, respectively
A buffer that contains 0.55 M base, B, and 0.30 M of its conjugate acid, BH+, has a pH of 8.94. What is the pH after 0.0020 mol HCl is added to 0.25 L of this solution.
Starting with acetylene and any other necessary reagents, propose a synthesis for 1,2-dibromobutane
The empirical formula for acetic acid is CH2O. Its molar mass is 60 g/mol. what the molecular formula is?
A molecular compound is dissolved in water at 25 C such that its mole fraction ,X, is 0.225. what is the vapor pressure of the resulting solution if the vapor pressure of pure water is 23.8 torr at 25 C
the iron oxide reacts to form water vapor and Fe(s) but the aluminum oxide remains unreacted. if the residue following heating weighs 1.596g, determine the weight percent of iron oxide in the original mixture.
If 4 g of CuSO4 is dissolved in 9.0x10^2 mL of 0.40 M aqueous NH3, what are the concentrations of Cu2+, Cu(NH34 2+, and NH3 at equilibrium? (Kf = 5x10^13)
the density of an aqueous ethanol solution is .789 g/mol. How many grams of ethanol should be mixed with water to make 225mL to make a 4.5% ethanol solution?
calculate the mass in kilograms of 3.99 liters of acetic acid. the density of this substance is 1.05g/mL ?
Experimentally observed facts have led to the establishment of rules used to predict the solubility of common compounds in water. The rules can be stated as follows: Compounds that contain , , , and are always soluble with no particular exceptions..
3.75g of a protein were dissolved in sufficient water to form 6.75mL of solution, and the osmotic pressure of the solution was found to be 1.88Torr at 25.0c.
How many mL of .360M HNO3 are needed to neutralize a 22.5mL sample of .240M KOH.
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