Answer:
B. begin with a hypothesis
Explanation:
Answer:
Zn + CuSO4 —> ZnSO4 + Cu
Explanation:
Zn is higher than Cu in electrochemical series and so will displaces Cu in solution according to the equation:
Zn + CuSO4 —> ZnSO4 + Cu
So calculate the H for the other two reactions a room temperature and combine the reactions to calculate the H of the decomposition of calcium carbonate using the Hess's Law
Answer: option B.
carbon + oxygen → carbon dioxide
Explanation:
A because if something happened to that organism then the organism relying on it will either go extinct or just die out due to starvation