Souring of wine occurs when ethanol is converted to acetic acid by oxygen by the following reaction:

c2h5oh + o2 --> ch3cooh + h2o

a 1.00 l bottle of wine, labeled as 8.5% (by volume) ethanol, is found to have a defective seal.
analysis of 1.00 ml showed that there were 0.0274 grams of acetic acid in that 1.00 ml. the density of ethanol is 0.816 g/ml and the density of water is 1.00 g/ml.

a. what mass of oxygen must have leaked into the bottle?

b. what is the percent yield for the conversion of ethanol to acetic acid if o2 is in excess?

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.