Consider the following reaction: 2 PbO(s) → 2 Pb(s) + O2(g)

What is the total volume of O2 produced when 1 mole of PbO decomposes at STP?

44.8 L

5.6 L

11.2 L

22.4 L

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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.

Answer explain why it is not possible to deduce a complete order of reactivity.