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If 95 0C of heat are added to a pure gold coin with a mass of 20 gm, what is its temperature change? Specific heat capacity of gold is 0.128 .
Determine the ΔH solution for this compound If the heat of solvation for this compound = -30.8 kJ/mol , crystal lattice energy = -62.2 kJ/mol.
Write the reaction between ferric chloride and lime slurry that results in precipitation of Fe(OH)3. For a dosage of 40 mg/l FeCl3: What is the required stoichiometric addition of lime expressed as CaO?
The activation energy for the reaction NO 2 (g)+CO 2 (g)?NO(g)+CO(g) is E a = 100kJ/mol and the change in enthalpy for the reaction is ΔH = -200kJ/mol. What is the activation energy for the reverse reaction?
2000°C the equilibrium constant for the reaction is Kc = 2.4 103. 2 NO(g) N2(g) + O2(g) If the initial concentration of NO is 0.150 M, what are the equilibrium concentrations of NO, N2, and O2.
Calculate the mass of NaHCO3 that was used up in the reaction for each beaker. The molecular weight of NaHCO3 is 84.007 g/mole.
Al(OH)3 + 3HCl ---> AlCl3 + 3H2O Determine the moles of acid neutralized if a tablet contains 0.200 mol Al(OH)3
If 17.2 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia.
Consider the following equilibrium process at 686°C: CO2(g) + H2(g) ? CO(g) + H2O(g) The equilibrium concentrations of the reacting species.
Determine the molar mass of the substance if 120.0 grams of a pure sample contained 24.0 mol of the substance. Express your answer in g/mol.?
A compound is found to be 30.45% N and 69.55 % O by mass. If 1.63 g of this compound occupy 389 mL at 0.00°C and 775 mm Hg, what is the molecular formula of the compound.
Determine the boiling point of an aqueous solution that is 2.30 m ethylene glycol (C2H6O2); Kb for water is 0.52 degrees celsius/m.
You have successfully purified a protein to homogeneity. From gel permeation chromatography studies, you determine that the protein has a molecular weight for 235,000 daltons.
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