contribution of the martyrs is very important for the nation building why? Tell answer in long plz and good answer I will make brillient answer?Can you​

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 is the most concentratic acid

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon