Calculate the relative molecular weight of the substances whose formulas are Li2O, Ca (NO3) 2.

univerkov | May 8, 2021 | education

The relative molecular weight is equal to the sum of the relative atomic masses of each element in the molecule. The relative atomic masses are indicated in the periodic table.
M (Li2O) = 7g / mol * 2 + 16g / mol = 30g / mol
M (Ca (NO3) 2 = 40g / mol + (14g / mol + 16g / mol * 3) * 2 = 164g / 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.