Sulfur has four naturally occurring isotopes: Sulfur – 32, Sulfur – 33, Sulfur – 34, Sulfur – 36. What is the atomic mass of sulfur if 95.00% of sulfur atoms have a mass of 31.972 amu, 0.76% have a mass of 32.971 amu, 4.22% have a mass of 33.967 amu, and 0.01% have a mass of 35.967? Answers; 35.967 amu

33.75 amu

32.971 amu

32.06 amu

What is the value of keq for the reaction expressed in scientific notation?

In which reaction is precipitation occurring?

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.