Assuming an electron is a hydrogen atom can undergo any of the transitions below, thus changing its energy. Which transition is associated with the absorption of light of the longest wavelength? n = 2 to n = 3
n = 1 to n = 3
n = 3 to n = 5
n = 5 to n = 3
n = 3 to n = 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? /

Calculate the number of molecules present in 0.750 mol of mgo.

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid