Uranium metal can be produced by the following reaction. How many moles of U3Og and moles of Al are required to produce 288 moles of UP How many moles of A1203 will also be produced.
3 U308(s) + 16 Al(s) + 9 U(s) + 8 Al2O3(s)

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.