Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattic

Question

Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattice points. The ionic radii of iron(II) ions and sulfide ions arc 88 pm and 184 pm. respectively. What is the density of FcS (in g/cm )? Ammonia. NH_3. is used as a refrigerant. At its boiling point of-33 degree C. the standard enthalpy of vaporization of ammonia is 23.3 kJ/mol. How much heat is released when 50.0 g of ammonia is condensed at -33 degree C? At 75.0 degree C. water has an equilibrium vapor pressure of 289.1 mm Hg. If 4.22 g H_2O is sealed in an evacuated 5.00 L flask and heated to 75.0 degree C. what mass of H_2O will be found in the gas phase when liquid-vapor equilibrium is established? Assume any liquid remaining in the flask has a negligible volume. (R = 0.08206 L atm/mol K. I atm = 760 mm Hg)

Explanation / Answer

Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattic

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