The recombination of iodine atoms to form molecular iodine in the gas phase follows second order kinetics and has a rate constant of 7.0 x 109 M-1s-1 at 23 °C. I(g) + I(g) → I2(g) A. Assuming the initial concentration of I (g) was 0.086 M, calculate the concentration of I (g) after 2.0 min. B. What would the half-life be if the initial concentration of I (g) was 0.42 M?

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