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Q.
The total number of atoms in a molecule of mustard gas is______.
The p-Block Elements - Part2
Solution:
The chemical formula of mustard gas is $ClC _{2} H _{4}- S - C _{2} H _{4} Cl$ or $C _{4} H _{8} Cl _{2} S$. Hence, the total number of atoms is $15$ .