# What is the mass fraction of mercury and oxygen in bivalent mercury oxide?

The mass fraction of mercury and oxygen in bivalent mercury oxide is as follows, first we write the formula for bivalent mercury oxide, which looks like this:
НgO
Further, to calculate the mass fraction of oxygen in bivalent mercury oxide, we use the following formula:
W = (n × Ar × 100%) / Mr
Where W is the mass fraction of the substance,
n is the number of atoms in a molecule,
Ar is the relative atomic mass of the element,
Mr is the relative molecular weight of the entire substance.
Further oxygen Ar
Ar (O) = 16
then we calculate the relative molecular weight of the whole substance:
Mr (HgO) = 201 + 16 = 217
Next, Substitute all known values ​​into the formula and get the following solution:
W (O) = 16 × 100% / 217 = 7.37%
Next, we calculate the mass fraction of mercury
W (Hg) = 100% – 7.37% = 92.63% 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.