Problem # $2$ : A bituminous coal has the following composition: carbon $62\mathrm{.}8,$ hydrogen $4\mathrm{.}6,$ sulfur $4\mathrm{.}4,$ oxygen $6\mathrm{.}6,$ nitrogen $1\mathrm{.}0,$ ash $8\mathrm{.}6$ and moisture $12\mathrm{.}1$ percent mass. The coal is burned completely with $25$ percent excess air. Calculate the probable analysis of the dry products of combustion.