Hi there were two unanswered questions are you able to assist with those?

Hi there were two unanswered questions are you able to assist with those? 5. Assume that magnesium would act atom-for-atom exactly the same as copper in this experiment. How many grams of magnesium would, have been used in the reaction if one gram of silver were produced? The atomic mass of magnesium is 24.31 g/mol.. Explain the source of the blue color of the solution after the reaction.