Amixture of helium and oxygen is used in scuba diving tanks to prevent ""the bends"". 46 l helium and 12 l oxygen are combined at 25°c and 1.0 atm in a tank with a total volume of 5.0 l. determine the partial pressures of he and oxygen and the total pressure in the tank.

Answer

given,

For helium

Volume,V = 46 L

Pressure,P = 1 atm

Temperature,T = 25°C  =  273 +25 = 298 K

R=0.0821 L . atm /mole.K

n₁ = ?

number of moles

we know

P V = n R T

  n₁ = 1.89 moles

For oxygen

Volume,V = 12 L

Pressure,P = 1 atm

Temperature,T = 25°C  =  273 +25 = 298 K

R=0.0821 L . atm /mole.K

n₂ = ?

number of moles

we know

P V = n R T

  n₂ = 0.49 moles

Total volume of tank = 5 L

temperature of tank = 298 K

Partial pressure of helium

     P₁ = 9.25 atm

Partial pressure of oxygen

    P₂ = 2.39 atm

total pressure

    P = P₁ + P₂

    P = 9.25 + 2.39

    P = 11.64 atm

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this