Question

How do you convert the grams to moles to molecules?

Answer 1

Hint: In order to convert the grams to moles, we will be requiring the molar mass of that particular element. For that you have to understand what a molar mass is. Molar mass is also called the Molecular weight. Molar mass of the chemical compound is the mass of one mole of the compound.

Complete step by step answer:
- To convert the mass into moles, we will be requiring the molar mass of the particular element. Molar mass of the chemical compound is the mass of one mole of the compound. Molar mass is also called the Molecular weight. We have to keep in mind that molar mass and molecular mass are different from one another.
- Molar mass is obtained by dividing the relative atomic mass which is found at the bottom of each element present in the periodic table with the number of moles of the atom or molecules. The formula for finding the molar mass is given below:
\[{\text{molar mass = }}\dfrac{{{\text{relative atomic mass}}}}{{{\text{number of moles}}}}\]

- The formula for converting the grams into moles does not look like this. The formulae will be having various for representing each term such as
N is the number of atoms
m is the mass of the atom
n is the number of moles
M is the molar mass
\[{N_A}\] is the Avogadro number
Let us rearrange the formula as
\[n = \dfrac{m}{M}\]
\[n \times {N_A} = N\]
By using the above formula, we can convert the grams to moles to molecules.

Note: We have to remember what an Avogadro number is
- Mole is defined as the amount of substance that contains Avogadro Number of molecules. Avogadro Number is \[6.022 \times {10^{23}}\] and it is represented by the symbol \[{N_A}\].
- The number of moles of a pure sample can be calculated using the formula
\[n = \dfrac{N}{{{N_A}}}\]