Use the data below calculate the lattice energy of magnesium chloride. Enthalpy of vaporization 127.4 kJ/mol 1st ionization Energy 737.7 kJ 2nd ionization energy 1450.7 kJ Enthalpy of dissociation 242 kJ/mol Electron affinity -349 kJ/mol Enthalpy of formation -641.62 kJ/mol

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Explain why scientists use shared characteristics to make cladograms.

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?