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 a substance is the molecular weight in grams. All you need to do is calculate the molecular weight and stick the unit g/mol after the number and that is the molar mass for the substance in question. Calculate the molar mass of Al(NO. (1 x 26.98) + (3 x 14.007) + (9 x 16.00) = 213.00 g/mol. 213.00 grams is the mass of one mole of aluminum nitrate. 213.00 grams of aluminum nitrate contains 6.022 x 10 23 entities of Al(NO. Video: How to Calculate the Molar Mass. The World-Wide Web contains molecular weight calculators, both ones that are on-line and programs you can download.