If you measure the mass of an object four times and get values that are very close to one another, the measurements are said to be

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.

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.

Which three statements represent the benefits of performing experiments using computer simulations?