Diferentes tipos de alimento en el crecimiento de un pollito amarillo variable independiente
variable dependiente
grupo experimental
grupo control
Hipótesis

What is the solubility of substance?

What effect might melting sea ice have for people who live in coastal areas?

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.