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Calculate the lattice enthalpy (ΔHl° in kJ/mol) of the MF2 metal fluoride using the following data: Bond dissociation enthalpy of F2(g) = 159 kJ/mol Electron affinity of F = -328 kJ/mol Enthalpy of sublimation of M = 112 kJ/mol First ionization energy of M = 395 kJ/mol Second ionization energy of M = 587 kJ/mol Standard enthalpy of formation of MF2(s) = -377 kJ/mol
A student weighs out a 6.12g sample of iron(II)iodide, transfers it to a 125mL volumetric flask, adds enough water to dissolve it and then adds water to the 125mL tic mark. What is the molarity of FeI2 in the resulting solution.
What is the specific heat of metal if its mass 27.32 g and it requires 108.3 J of heat energy to raise its temperature from 22.2⁰C to 32.5⁰C?
A sample of gold was heated from 25.0⁰C to 45.3⁰C. In the process, 267.1 J of heat were absorbed. What mass of gold was in the sample? (The specific heat of gold is 0.129 J/g.⁰C)
How much heat is needed to warm 325 g of water from 25⁰C to 92.5⁰C ? (knowing that the specific heat of water is 4.18J/g.⁰C)
A sample of an unknown compound, composed only of carbon and hydrogen, produced 2.56g of CO2 and 0.786g of H2O in a combustion analysis. What is the empirical formula of the unknown compound?
1.05 L of ethane gas (C2H6) at 20.5*C and 771 mmHg burns in a bomb calorimeter, which makes the temperature rise to 100.5*C. What is the heat capacity of the calorimeter in kJ/K?
Why do we add HCl to iodine in the titration of vitamin C?
1. Arrange the following ions in order of increasing ionic radius: potassium ion, calcium ion, phosphide ion, sulfide ion (smallest to largest) 2. Arrange the following ions in order of increasing ionic radius: aluminum ion, sodium ion, fluoride ion, nitride ion (smallest to largest)
1. Using only the periodic table arrange the following elements in order of increasing ionization energy: thallium, lead, astatine, polonium 2. Using only the periodic table arrange the following elements in order of increasing ionization energy: potassium, rubidium, hydrogen, cesium
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