Explain how the situation described in the article shows that the outside environment can help and hurt cells (photo is what article is called)

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

i believe the answer is 5,000