Calculate the relative molecular weight of CaO, HNO3, CuSO4.

The relative molecular weight of a compound (M) is the sum of the relative atomic masses (A) of each element, taking into account the indices (n). (A) – determined by the periodic table.
M (CaO) = A (Ca) + A (O) = 40 + 16 = 56.
M (HNO3) = A (H) + A (N) + A (O) * 3 = 1 + 14 + 16 * 3 = 63.
M (CuSO4) = A (Cu) + A (S) + A (O) * 4 = 63.5 + 32 + 16 * 4 = 159.5.



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.