Обчисліть масу цукру та води необхідні для приготування 500 г розчину з масовою часткою розчиненої речовини 40 %

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.

All motion is caused by force? true or false

Which sample at stp has the same number of atoms as 18 liters of ne at stp