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

Given pieces of Zn and Al, and amounts of ZnSO4 and Al(SO4)3 solutions, what combinations of these four substances would you make to illustrate that Zn is less reactive than AL?

Calculate the lattice energy of AgBr(s) using the following thermodynamic data (all data is in kJ/mol).  Ag(s) ΔHsublimation = 265 kJ/mol Ag(g) Ionization energy = 711 kJ/mol Br-Br(g) Bond energy = 173 kJ/mol Br(g) Electron affinity = -345 kJ/mol AgBr(s) ΔH°f = -120 kJ/mol ______________ kJ/mol

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,

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: 2+ 2+ Mg, Fe, a s- 0..

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

Testosterone is an anabolic steroid. The structure of testosterone is shown below. What is the idealised bond angle at the indicated atom (ii) ? Hint: atom (iv) has been completed for you as an example. (iv) bond angle: 109.5°, geometry of the electron pairs: tetrahedral, shape of the bonds: tetrahedral ·····|||I H ····||||I ii iv

Write the empirical formula for at least four ionic compounds that could be formed from the following ions: 2+ Fe²+, C₂H₂O₂, NH, SO 0 0.0.... X 00 S

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 empirical formula of at least four binary ionic compounds that could be formed from the following ions: 2+ Zn*, v°*, F¯, O²- 0,..