How much heat is required to increase the temperature of 198.5 grams of water from 25.0 degrees celsius

What is the mass of 8 moles of sodium atoms

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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.