Question

Find the mass of 1 millimole of H2S.

Answer 1

Atomic mass of hydrogen = 1 a.m.u.

Atomic mass of Sulphur = 32 a.m.u.

Thus, the molecular mass of hydrogen sulphide, which contains two atoms of hydrogen and one atom of sulphur is

= 2 – 1 + 1 -32

= 34a.m.u

Therefore, the relative molecular mass of hydrogen sulphide is 34a.m.u

Answer 2

$\Large {\textsf{\textbf \red{Hello! Oppa!,}}}$

• Atomic mass of hydrogen = 1 a.m.u.

• Atomic mass of Sulphur = 32 a.m.u.

$\mapsto$ Thus, the molecular mass of hydrogen sulphide, which contains two atoms of hydrogen and one atom of sulphur is

= 2 – 1 + 1 -32

= 34a.m.u

$\leadsto$ Therefore, the relative molecular mass of hydrogen sulphide is 34a.m.u.