When scientists say that a theory can never be proven, what are they actually saying?

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

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 of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize