1 After each treatment, checking the hair and combing with a nit comb to remove nits and lice every 2â3 days may decrease the chance of selfâreinfestation. 2  Continue to check for 2â3 weeks to be sure all lice and nits are gone.
In chemistry, the molar mass M is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by the amount of substance. The base SI unit for molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.
The molar mass of molecules of these elements is the molar mass of the atoms multiplied by the number of atoms in each molecule: M(H 2) = 2 Ã 1.007 97(7) Ã 1 g/mol = 2.015 88(14) g/mol M(S 8) = 8 Ã 32.065(5) Ã 1 g/mol = 256.52(4) g/mol M(Cl 2) = 2 Ã 35.453(2) Ã 1 g/mol = 70.906(4) g/mol. Molar masses of compounds