What is the density of an unknown object that has a mass of 5.0 g and volume of 20
ml?

How can you use chemical equations to predict the products of the reaction you can carry out?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat