Which of the element pairs are in the same period? Silver and Gold
Cobalt and Iridum
Caesium and Barium
Hyrdogen and Lithium

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?