edicting the compounds Write the empirical formula for at least four ionic compounds that could be formed from the following ions: 3+ Fe³+, SO, PO, Pb4+ 0.0.... X 0

Write the empirical formula for at least four binary ionic compounds that could be formed from the following ions: Mg^2+, V^5+, Cl^-, S^2-

Write the empirical formula of at least four binary ionic compounds that could be formed by the following ions: Fe^2+, AI^3+,F^-,O^2-

4. The common oxidation number for an alkaline earth metal is +2. (a) Using the Born-Mayer equation (for determining the lattice enthalpy) and a Born-Haber cycle (draw it), show that CaCl is an exothermic compound (negative AHf). Make a reasonable prediction to estimate the ionic radius of Ca (explain your reasoning). The sublimation (atomization) enthalpy for Ca(s) is 178 kJ/mol. (b) Show that an explanation for the non-existence of CaCl can be found in the enthalpy change for the reaction below. The AHf for CaCl2(s) is -190.2 kcal/mol. 2 CaCl(s) → Ca(s) + CaCl2(s)

X TaO, is very unlikely to exist, but let's pretend that it does. Write the balanced chemical equation for the hypothetical reaction of TaO," with ruthenium(II) ions to generate ruthenium(III) ions and Ta(11) ions in acidic aqueous solution. Do not include states of matter. XX. 8.

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Mg“, Fe*, F", s?- 2+ 2+ Mg", Fe", F,

c) Calculate the nominal masses of following ions and indicate whether they are odd-electron ions or even- electron ions: (i) CH;N+ (ii) H3O+ (iii)

Calculate the second ionization energy of the metal M (AH¡on2 in kJ/mol) using the following data: Lattice enthalpy of MO(s), AH = -2278 kJ/mol Bond dissociation enthalpy of O2(g) = +498 kJ/mol %3D First electron affinity of O = -141 kJ/mol Second electron affinity of O = +744 kJ/mol Enthalpy of sublimation of M = + 125 kJ/mol First ionization energy of M = + 309 kJ/mol Standard enthalpy of formation of MO(s), AHf = -341 kJ/mol

Answer the following questions that relate to the chemistry of nitrogen. (a) Two nitrogen atoms combine to form a nitrogen molecule, as represented by the following equation. 2 N(g) ® N2(g) Using the table of average bond energies below, determine the enthalpy change, AH, for the reaction. Average Bond Energy (k) mol-1) Bond N-N 160 N=N 420 N°N 950 (b) The reaction between nitrogen and hydrogen to form ammonia is represented below. N2(g) + 3 H2(g)® 2 NH3(g) AH° = -92.2 kJ Predict the sign of the standard entropy change, AS', for the reaction. Justify your answer. (C) The value of AG° for the reaction represented in part (b) is negative at low temperatures but positive at high temperatures. Explain.

Write the chemical formula for tellurium diiodide