Which ionic equation represents a spontaneous reaction that can occur in a voltaic cell? 1. cu(s) + zn(s) → cu2+(aq) + zn2+(aq) 2. cu(s) + zn2+(aq) → cu2+(aq) + zn(s) 3. cu2+(aq) + zn(s) → cu(s) + zn2+(aq) 4. cu2+(aq) + zn2+(aq) → cu(s) + zn(s)

3. Cu²⁺₍aq₎ + Zn₍s₎ → Cu₍s₎ + Zn²⁺

Explanation:

In a voltaic cell where copper (II) suphate is the electrolyte and zinc and copper electrodes copper is deposited while zinc goes into solution.  

Zn₍s₎ → Zn ²⁺ ₍aq₎ +2e⁻

The two electrons are taken by copper ions to form copper atoms.

Cu²⁺₍aq₎ + 2e⁻ → Cu₍s₎

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)