What is the charge on an electron? -1 0 +1 +2

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?