The standard reduction potential for a substance indicates how readily that substance gains electrons relative to other substances at standard conditions. the more positive the reduction potential, the more easily the substance gains electrons. consider the following:

sn2+(aq)+2e−→sn(s),cu2+(aq)+2e−→cu( s), e∘red=−0.140 v e∘red=+0.337 v

what is the standard potential, e∘cell, for this galvanic cell? use the given standard reduction potentials in your calculation as appropriate.

express your answer to three decimal places and include the appropriate units.

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.