Question

Calculate the molecular mass of ${\mathrm{Cl}}_2$

Answer 1

• The molecular mass of a substance is defined as the sum of atomic masses of all the atoms in a molecule of a substance
• The molecular mass of ${\mathrm{Cl}}_2$=$$\begin{gathered} 2\times atomicmassofchlorine \\ =2\times 35.5 \\ =71u \end{gathered}$$