How many moles of Li are essential for generating 0.03 moles of Li3N in the given reaction?
6Li + N2 + 2Li3N
please show how you got it

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.

Light waves are as they pass through the

Which of the following statements are incorrect?