Calculate the number of copper atoms in a 63.55 g
sample of copper.​

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

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.