The Purpose Of Lab 5 Wards I Have A Percentage Composition Lab- The Purpose To Determine The Percentage Of Copper In An Oxide Of Copper. ?

I have a percentage composition lab- the purpose to determine the percentage of copper in an oxide of copper. ? - the purpose of lab 5 wards

Therefore, 1.70g and 0.15 g copper heat and carbon in a crucible, and once in a frying pan, looked like a cup of tea, pure copper is heated. Formula was 2CuO + C -> CO2 2 Cu-Single Replacement
Final questions:
Keep 2.) Why do you expect from a large excess of carbon was in favor of a small surplus to be avoided?
4.) If you a percentage of copper, which was too big obatained what one should expect that the presentation of the contents of cruicible that after the heat?
5.) If you're a chemist at Proust and Berthollet, how could I have used this method to the rate of cuprous copper for experiments that could help determine to resolve the controversy?