This is what I have so far but I don't know how to get the number of molecules within Benzoyl Peroxide? Benzoyl Peroxide aqueous Base, Acne Treatment Gel contains 10% of benzoyl peroxide (C14H10O4)

Molar mass of benzoyl peroxide is (2x14) + (1x10) + (16x4) = 168 + 10 + 64 = 242 g/mol

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

How many grams of aluminum will there be in 98g of al2o3?

When a septic tank backs up a goes in to clean it out