When water evaporates from Earth’s surface into the atmosphere, its molecules enter the gas state. What subsequent change causes gas molecules to condense into the small water droplets that form clouds? A. Mass is reduced.
B. Volume is increased.
C. Temperature is reduced.
D. Pressure is increased.

Name the element in group 17, period 2. (periodic table)

Which statement best describes the flow of energy in this scenario

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.