Which of the following reactions is not an example of an oxidation-reduction reaction? ( 2 points) select one: a. h2 + f2yields 2hf b. fe + cuso4yields feso4 + cu c. cuso4 + 2naoh yields cu(oh)2 + na2so4 d. cl2 + zni2yields zncl2 + i2

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

Which of the following units is not an official si unit? mole liter kilogram ampere

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.