A metallurgical furnace uses bituminous coal of the following composition:

The ashes from the furnace are one$-$fourth unburned carbon. The outside air is at $22C.$ and $751mm.$ barometric pressure. $50$ per cent more arr is used than the theoretical requirement.

Required: $1.$ The cubic feet of air $($at standard conditions$)$ theoretically required to burn $1lb.$ of coal

$2.$ The cubic feet of air actually used at the given conditions

$3.$ The volume of the products of combustion $($flue gases$)$ in cubic feet, and therr percentage composition.

$4.$ The cubic meters of air $($at standard conditions$)$ actually used, per kilogram of coal.

$5.$ The volume of the products of combustion in cubre meters, and their perentage composition.b