In the Copper Cycle Lab the experimental results should have as much at the end of the experiment as at the beginning. This proves the law of .

atoms or 'mass'

Explanation:

Mass reaction which postulates that the amount of reactants in a reaction should be equal to the amount of products from that reaction. hence a balanced reaction.

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.

the answer is       political office  

hope this .