Which of the following is the balanced overall reaction and standard cell potential of an electrochemical cell constructed from half-cells with the given half reactions? Mn 2+(aq) + 2 e−→Mn(s); E° = –1.180 V Pb2+(aq) + 2 e−→ Pb(s); E° = –0.130 V Group of answer choices Pb 2+(aq) + Mn(s) →Pb(s) + Mn2+(aq); = 1.050 V Pb(s) + Mn2+(aq) →Pb2+(aq) + Mn(s); = −1.050 V Pb 2+(aq) + Mn2+(aq) →Pb(s) + Mn(s); = –1.310 V Pb 2+(aq) + Mn(s) →Pb(s) + Mn2+(aq); =0.525 V Pb(s) + Mn2+(aq) →Pb2+(aq) + Mn(s); = −0.525 V

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

How many atoms are in 2 moles of phosphorus