Question

How would you calculate the molar mass of Bromine trioxide?

Answer 1

In order to calculate the molar mass of Bromine trioxide, we must first know what a molar mass is. Molar mass can also be referred to as the Molecular weight. Molar mass of the chemical compound is said to be the mass of one mole of the compound.

Complete answer:
Let us first understand about the Molar mass. Molar mass, also referred as the Molecular weight, is the mass of one mole of the substance. It is expressed in the units of $gmo{l^{ - 1}}$.
- We need to follow the following steps to calculate the molar mass.
- First, we have to identify the formula of a given compound or molecule.
- Then determine the number of moles of atoms present in the given compound or molecule.
- we have to multiply the mass of each atom with the number of moles of the atom.
- This has to be done for every element present in the compound.
- Finally add all these values.
- The obtained value is expressed in $gmo{l^{ - 1}}$.
Now, consider the given Bromine trioxide $Br{O_3}$:
Molar mass of Bromine trioxide = molar mass of bromine + molar mass of oxygen
Molar mass of Bromine trioxide = $79.9 + 3 \times 16.0 = 127.9gmo{l^{ - 1}}$
Therefore, the molar mass of Bromine trioxide is $127.9gmo{l^{ - 1}}$

Note:
We must always remember that molar mass is different from the molecular mass. Now let us compare molar mass with Molecular mass:

MOLAR MASS	MOLECULAR MASS
Molar mass is referred to as the mass of one mole of the substance.	Molecular mass is the mass of the molecule.
It is expressed in the unit of $gmo{l^{ - 1}}$.	It is expressed in the unit of amu.
It is also known as Molecular weight.	It determines the mass of a single molecule.