Final answer:
The mole fraction is the ratio of the number of moles of a component to the total moles in a mixture, and the mole ratio is derived from a balanced chemical equation, specific to the substances involved.
Step-by-step explanation:
The question asks about determining the mole fraction and mole ratio between Xe atoms and F atoms. The mole fraction, denoted as X, is the ratio of the number of moles of a component to the total number of moles of all components in a mixture. To find the mole ratio, you would utilize a balanced chemical equation to compare the moles of two substances. When given the mole amounts of gases in a mixture, you can calculate mole fractions and partial pressures. If dealing with a gas mixture where we know the partial pressures, the mole fraction is the ratio of the partial pressure of the component to the total pressure of the mixture.
For example, in a mixture with a total pressure of 1.40 atm, where component A has a partial pressure of 0.80 atm, the mole fraction would be XA = 0.80 atm / 1.40 atm = 0.57. Similarly, if component B has a partial pressure of 0.60 atm, its mole fraction would be XB = 0.60 atm / 1.40 atm = 0.43. These concepts are essential in gas laws, such as Dalton's law of partial pressures.