Question

How do you determine the formula and molar mass of silver cyanide?

Answer 1

We need to know that in chemistry, periodic tables play a vital role. In the periodic table there are totally $118$ elements. In the periodic table there are totally $18$ columns and $7$ rows. The columns are called groups. Hence, $18$ groups in the periodic table. The rows are called periods. Hence, totally $7$ period in the table. In chemistry each element has a specific symbol in the periodic table. We first know the symbol of every element in the given molecule. The chemical name depends on the symbol of the element and number of the element count in the molecule. In written chemical names of molecules having some rules and regulation. In chemical formulas, the symbol of a metal atom is written first and others are written next.
Formula used:
The molecular weight of the molecule is dependent on the atomic weight of the atom present in the molecule. The molecular weight of the molecule is equal to the sum of the molecular weight of the atom and the number of the respective atom in the molecule.
${\text{Molecular weight}} = {\text{Number of the atoms}} \times {\text{Atomic weight of the atom}}$

Complete answer:
The chemical formula of silver cyanide is ${\text{AgCN}}$. Because silver is metal, it should come first in the formula.
The molar mass of silver cyanide is calculate,
The molar mass is nothing but the molecular mass divided by the moles in the molecule.
The atomic number of silver is $47$ and the symbol is ${\text{Ag}}$. The mass number of silver is $107.868$.
The atomic number of carbon is $6$ and the symbol is ${\text{C}}$. The mass number of carbon is $12$.
The atomic number of nitrogen is $7$ and the symbol is ${\text{N}}$. The mass number of nitrogen is $14$.
The molecular mass of silver cyanide is calculate,
Silver cyanide has one silver atom, one carbon atom and nitrogen atom.
$= 107.868 + 12 + 14 = 133.868$
According to the above discussion and calculation, we conclude is the formula and molar mass of silver cyanide is ${\text{AgCN}}$ and ${\text{133}}{\text{.868g}}$

Note:
We need to know that the atomic number of the element is nothing but the number of electrons or number of protons. The mass number of the atom is nothing but the sum of the number of protons and number of neutrons. The sum of the total oxidation number of the atom in the molecule is zero. If it is zero means the molecule is in a stable state. If suppose, the sum of the oxidation number of the atom is greater than zero or positive value. That molecule is considered a cationic compound. In other cases, the sum of the oxidation number of the atom in the molecule is less than zero means that the molecule is considered an anionic compound. The anionic and cationic compounds are less stable than neutral molecules.