Give me the formular of number of mole

$$n = \frac{\text{mass}}{\text{molar mass}}$$

Where:

• $n$ is the number of moles (mol)
• mass is the mass of the substance (g)
• molar mass is the molar mass of the substance (g/mol)

$$n = \text{Molarity} \times \text{Volume}$$

Where:

• $n$ is the number of moles (mol)
• Molarity is the concentration of the solution (mol/L or M)
• Volume is the volume of the solution (L)

$$n = \frac{\text{Number of particles}}{\text{Avogadro's number}}$$

Where:

• $n$ is the number of moles (mol)
• Number of particles refers to atoms, molecules, ions, etc.
• Avogadro's number ($N_A$) is approximately $6.022 \times 10^{23} \text{ mol}^{-1}$