$1.(810$ point$)$ Ethanol is reacted to produce acetaldehyde in the presence of air. After separation of the product, the output gas leaves with the following composition: $,$ and $.($a$)$ Using a basis of $,$ what are $,$ and : $($in mol$)($b$)$ How many kilograms of acetaldehyde are produced per kilogram of ethanol fed into the process?