IN A MIXTURE OF GASES, HOW IS THE TOTAL PRESSURE RELATED TO THE PARTIAL PRESSURES OF THE GASES INTHE MIXTURE?

Partial pressure of gas =  mole fraction of the gas x total pressure

Explanation:

In a gas mixture, the partial pressure of each of the gases present in the gas mixture is proportional to the mole fraction of the gases. The pressure exerted by each of the gas in the gas mixture is known as partial pressure. This is independent of the pressures that is exerted by the gases that is present in the mixture. Therefore, total pressure which is exerted by the gas mixture is the summation of the of the partial pressures of each of the gases in the mixture. This is given by Dalton's law of partial pressures.

Mathematically,

Partial pressure of gas =  mole fraction of the gas x total pressure

The information  Van Lew relayed to Union army commanders were:

1. where the prisoners had been (she talked to the men about where they had been)

2.  who commanded which rebel armies (They recognized who commanded which rebel armies)

3. the morale of rebel (insight into the morale of the rebel troops)

4. where the rebel troops were headed (Alert federal soldiers took notice of rebel troop strength and movement)