Question

Calculate the relative molecular mass of H₂S.

Answer 1

Atomic mass of hydrogen($\mathrm{H}$) = 1 a.m.u

Atomic mass of sulphur($\mathrm{S}$) = 32 a.m.u

Molecular mass of hydrogen sulphide(${\mathrm{H}}_2\mathrm{S}$) =2 x Molecular mass of Hydrogen($\mathrm{H}$) + Molecular mass of Sulphur($\mathrm{S}$)

= 2 x 1 + 32 = 34 a.m.u

Therefore, relative molecular mass of hydrogen sulphide (${\mathrm{H}}_2\mathrm{S}$) = 34 a.m.u.