Determine the mass in grams of 5.83 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)

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 most likely true about water in chemical solutions?

The time that is taken by neptune once around the sun is called