Calculate the energy possessed by a single photon of each of the following types of electromagnetic radiation with the following frequency 1) 6.32 x 10*23 S-1
2) 9.50 x 10*13Hertz
3) 1.05 x 10*18 S-1

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? /

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.