***40 ! *** using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy change represented by x? 3c + 3o2 yields 3co2 deltah = x 4h2 + 2o2 yields 4h2o deltah = - 1144 kj c3h8 + 5o2 yields 3co2 + 4h2o deltah = -2222 kj c3h8 yields 3c + 4h2 deltah = 104 kj 104 = (-2222) - [x - (-1144)] 104 = (-2222) - [x + (-1144)] < correct 104 = (-2222) + [(-1144) - x] 104 = (-2222) - [(-1144) - x]

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization.a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution.part bcalculate the percent ionization of ha in a 0.010 m solution