Final answer:
In a pure sample of methylthiol, CH3SH, the intermolecular attractions present are dispersion forces and dipole-dipole attractions.
Step-by-step explanation:
In a pure sample of methylthiol, CH3SH, the intermolecular attractions that exist are dispersion forces and dipole-dipole attractions.
Dispersion forces are the weakest intermolecular forces and occur between all molecules, whether polar or nonpolar.
They are caused by temporary fluctuations in electron distribution that create temporary dipoles, resulting in weak attractions between molecules.
Dipole-dipole attractions occur between polar molecules and are stronger than dispersion forces.
These attractions arise from the positive end of one polar molecule being attracted to the negative end of another polar molecule.