Question

What is the molar mass of carbon tetrachloride?

Answer 1

Step 1: Molar mass:

• The mass of 1 mole of a substance is called its molar mass.

Step 2: Formula for molar mass

• $\mathrm{Molar}\mathrm{mass}=\mathrm{The}\mathrm{atomic}\mathrm{mass}\mathrm{of}\mathrm{element}\times \mathrm{number}\mathrm{of}\mathrm{atoms}\mathrm{given}\mathrm{in}\mathrm{subscript}$

Step 3: Calculation of Molar mass of Carbon tetrachloride $\left({\mathrm{CCl}}_4\right)$:

$$\begin{gathered} \mathrm{Molar}\mathrm{mass}\mathrm{of}{\mathrm{CCl}}_4=\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{C}+\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Cl} \\ \mathrm{Molar}\mathrm{mass}\mathrm{of}{\mathrm{CCl}}_4=12.01\mathrm{g}{\mathrm{mol}}^{-1}+\left(4\times 35.45\mathrm{g}{\mathrm{mol}}^{-1}\right) \\ \mathrm{Molar}\mathrm{mass}\mathrm{of}{\mathrm{CCl}}_4=12.01\mathrm{g}{\mathrm{mol}}^{-1}+141.8\mathrm{g}{\mathrm{mol}}^{-1}=153.81\mathrm{g}{\mathrm{mol}}^{-1} \end{gathered}$$

Thus, the molar mass of carbon tetrachloride is $153.81\mathrm{g}{\mathrm{mol}}^{-1}$.