(Multiple Choice, 30 pts)

Which is evidence that the reaction below is a redox reaction?
2Na + Cl2 → 2NaCl

A. The sodium atom is a pure element as a reactant and becomes part of a compound.
B. Two different elements take part in the reaction.
C. Oxidation occurs to both elements in the reaction.
D. There are no ions in the equation.

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? /

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Connect the whole numbers on the periodic table to indicate what they represent?