1. Which of the following best describes how the 2 scientists explain how craters are removed from Europa's surface?
A) Scientist 1:Sublimation Scientist 2: Filled in by water
B) Scientist 1: Filled in by water Scientist 2: Sublimation
O C) Scientist 1: Worn smooth by wind Scientist 2: Sublimation
D) Scientist 1: Worn smooth by wind Scientist 2: Filled in by water

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