The second stage of the ostwald process begins by oxidizing nitric oxide gas in oxygen gas to nitrogen dioxide gas. then, the resulting nitrogen dioxide gas is absorbed by waterto yielding nitric acid hno3(aq) and some nitric oxidegas. these reactions are often carried out at ~50ºc (323 k) and atmospheric pressure. write these two balanced chemical reactions.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)