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 for sodium bromide is 102,9 g/mol. nNaBr= 16,6 g/ 102,9 g/mol = 0,16 moles. The concentration of the solution is therfore = 0,16 moles/ 1,330 kg = 0,12 molal. -While the above is true it should 0.121 molar due to significant digits (just a technicality).