The 3 liters closed container.
Explanation:
We have the ideal gas law:
PV = nRT
where:
P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
The number of moles n₁ (which is 1 mole) from the 2 liter (V₁) container are equal to:
n₁ = PV₁ / RT
The number of moles n₂ from the second container ( (V₂) are equal to:
n₂ = PV₂ / RT
From the data given in the problem we know that:
n₂ = 3 × n₁
We replace the n's:
PV₂ / RT =3 × PV₁ / RT
(PV₂ / RT) × (RT / P) = 3 × V₁
V₂ = 3 × V₁
V₂ = 3 × 2
V₂ = 6 liters
Learn more about:
ideal gas law
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