Tlhme 10O kPa-1 atm uPed pressure of 57 PA lime 1OO kPa-1 atm A sample of nitrog

Question

Tlhme 10O kPa-1 atm uPed pressure of 57 PA lime 1OO kPa-1 atm A sample of nitrogen gas at 50 C and 800 mmIG has a volume of 1.ast What is the volume at 0 C and 1 atm of pressure? Calculate the total pressure (in atm) of a mixture of 0.0200 mol of helium He, and 0.0100 mol of hydrogen, H2, in 2.50-L. lask at 10 C. Assume ideal ga behavior. What is the density of oxygen, O2, in grams per liter at 25 C and 0.850 at Hint: n- m/Mm; PV- nRT or PV- m/Mm(RT); n- moles, Mm- mola mass and R (gas constant) 0.0821 Liter atm/mole K

Explanation / Answer

(1)

Using relation:

P1V1/T1 = P2V2/T2

Putting values:

(800*1.25)/(273+50) = (760*V2)/(273+0)

Solving we get:

V2 = 1.112 L

(2)

Using relation:

PV = nRT

Here,

n = total number of moles = 0.02+0.01 = 0.03

Putting values:

P*2.5 = 0.03*0.0821*283

Solving we get:

P = 0.278 atm

Hope this helps !

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