Select the star life cycle that is accurate? a. star of one stellar mass, red giant, planetary nebula, white dwarf o b. nebula, star of one stellar mass, supernova, black hole o c. supernova, star of three stellar masses, red giant, nebula o d. nebula, white dwarf, red giant, planetary nebula

Idid a lab for chemistry where we put nails in a copper (ii) chloride solution. 1. why did the reaction stop? which reactant was used up? how do you know? 2. describe what was happening to the atoms of iron and copper during the reaction. what is this type of reaction called? 3. what would happen to the ratio of copper to iron if you had placed more nails in the beaker? if you had let the reaction go for less time? 4. what is the accepted ratio of copper atoms to iron atoms in this reaction? account for differences between your experimental value and the accepted value. write the balanced equation for the reaction.