How is the pressure of a gas in a mixture related to the total pressure of the mixture?

The ratio of partial pressure of a gaseous component to the total vapour pressure of the mixture is equal to :

The ratio of the partial pressure of a gaseous component to the total vapour pressure of the mixture is equal to :

At 27^(@)C , a cylinder of volume 10 L contains a gas mixture consisting of 0.4 He, 1.6g O_(2)&1.4g H_(2) . Determine the total pressure of the mixture and the partial pressure of He in the mixture.

A gas mixture was prepared by taking equal mole of CO and N_(2) . If total pressure of the mixture was 1 atm, the partial pressure of N_(2) in the mixture is-

In a mixture of A,B and C gases, the mole fractions of A and C are 0.25 and 0.45, respectively. If the total pressure of the mixture is P, then find the partial pressure of B in the mixture.

A gaseous mixture was prepared by taking equal moles of CO and N_2 . If the total pressure of the mixture was found 1 atm, the partial pressure of the nitrogen (N_2) in the mixture is