Consider an electrochemical cell constructed from the following half cells, linked by an external circuit and by a KCl salt bridge. - an Al(s) electrode in 1.0 M Al(NO3)3 solution - a Pb(s) electrode in 1.0 M Pb(NO3)2 solution The balanced overall (net) cell reaction is A) Pb(s) + Al3+(aq) → Pb2+(aq) + Al(s). B) 3Pb(s) + 2Al3+(aq) → 3Pb2+(aq) + 2Al(s). C) 3Pb2+(aq) + 2Al(s) → 3Pb(s) + 2Al3+(aq). D) Pb2+(aq) + Al(s) → Pb(s) + Al3+(aq).

How do forces between particles in gases compare to forces in the other states of matter? o a. the forces in gases are stronger than forces in solids but weaker than forces in liquids. o b. the forces in gases are weaker than forces in solids but stronger than forces in liquids. o c. the forces in gases are weaker than forces in solids and liquids. o d. the forces in gases are stronger than forces in solids and liquids. submit

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat