What is the Lewis symbol for As? Select the correct answer below: O O O :As 3- 3- As 3- :As As What is the formula of the compound phosphorus trifluoride? Note: Don't bother with subscripts, you'll be graded on a plain text answer and also given the correctly subscripted answer in the feedback. For example, if the given compound was "water", you should enter H2O and the feedback will show you HO. For the reaction MgCl2 + 2 KOH- Mg(OH)2 (s) + 2 KCI Which is/are the spectator ion/ions? Mg2+ CI K+ OH MgCl2 KOH Mg(OH)2 KCI No spectators