Question

 Mustard gas is a poisonous gas that was used in World War 1 and banned afterward. It causes general destruction of body tissues, resulting in the formation of large water blisters. The chemical formula for mustard gas is C4H8Cl2S. What is the molecular mass of mustard gas?

Answer 1

Mr(C₄H₈Cl₂S) = 4 × 12 + 8 × 1 + 2 × 35.5 + 32) = 159 g/mol