2. When a chemical reaction occurs, we often get a combination of two or more elements called a___.
These are
found in units called___.

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

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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.