Calculate the amount of copper oxide substance weighing 240 g.

Given:
m (CuO) = 240 g
To find:
n (CuO)
Decision:
M (CuO) = 64 + 16 = 80 g / mol
n (CuO) = m / M = 240 g / 80 g / mol = 3 mol
Answer: the amount of copper oxide substance is 3 mol.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.