Final answer:
Dalton's Law of Partial Pressures states that the pressure exerted by each gas in a mixture is independent of the pressure exerted by other gases in the mixture. D. Workman revised Haldane's theory to a nitrogen ratio of 5:1.
Step-by-step explanation:
According to Dalton's Law of Partial Pressures, the pressure exerted by each gas in a mixture is independent of the pressure exerted by other gases in the mixture. John Dalton found that each gas exerts a pressure based on the number of moles of gas present, not the type of gas.
In the case of the revision by D. Workman, the nitrogen ratio would be 5:1, based on Haldane's theory that the human body can withstand a 2:1 pressure ratio. This means that for every 5 parts nitrogen, there would be 1 part other gases.