How many moles of ammonia would be required to react exactly with 0.158 moles of copper (||) oxide in the following chemical reaction? 2NH3(g) + 3CuO(s) ---> 3Cu(s) + N2(g) + 3H2O(g)

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

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.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium