The formula for mustard gas used in chemical warfare is c4h8scl2 (159.09 g/mol). what is the percentage of hydrogen in the compound?

The molecular formula for mustard gas is C₄H₈SCl₂

the molecular mass of mustard gas - 159.09 g/mol

atomic mass of H is 1 g/mol

The mass of H in 1 mol of compound - 1 x 8 = 8 g

this means that in 159.09 g of compound, 8 g of H present

mass percentage of hydrogen = 8 g / 159.09 g x 100%

mass percentage of hydrogen = 5.03%