Question

What is the molar mass of silver nitrate?

Answer 1

Hint: The molecular weight or the molar mass of any compound is the sum of the masses of all the atoms present in that compound in their respective quantities. The molecular weight has a unit of grams per mole. It is the weight of any element or compound in 1 mole that is $6.022\times {10}^{23}$ particles of that molecule. So it is measured in g/mol.

Complete answer:
Molecular mass of any molecule is the sum of mass of the individual atoms present in that molecule in the quantities in which it is present. We have been given to find the molar mass of silver nitrate. Silver nitrate has the formula of $AgN{O}_3$. As from the formula we can see that silver nitrate contains 1 silver (Ag) atom, 1 nitrogen (N) atom and 3 oxygen (O) atoms. The molecular weight will be the sum of the masses of these atoms. The quantity of 3 oxygen atoms will be multiplied with molar mass of oxygen.
The molar masses of individual atoms are, silver (Ag) has 107.8 g/mol, nitrogen (N) has 14 g/mol and oxygen (O) has 16 g/mol.
So, the molar mass of $AgN{O}_3$= 107.8 + 14 + 3 (16) g/mol
Molar mass of $AgN{O}_3$= 107.8 + 14 + 48 g/mol
Molar mass of $AgN{O}_3$= 169.8 g/mol
Hence, the molar mass of $AgN{O}_3$ is 169.8 grams per mole.

Note:
The molar mass is measured in g/mol which is also called atomic mass unit denoted by ‘amu’ or ‘u’. The atomic mass of an atom is the sum of the number of protons and neutrons of that atom. The mass is concentrated in the nucleus due to this reason that protons and neutrons are found in the nucleus of an atom and called nucleons..