A 2.0 L sample of gas at 640 mmhg is allowed to expand into a 8.0l container at a constant temperature what is the new pressure

160mmHg

Explanation:

V1 = 2.0L

P1 = 640mmHg

V2 = 8.0L

P2 = ?

This question requires the use of Boyle's law which states that the volume of a fixed mass of gas is inversely proportional to its pressure provided that temperature remains constant.

Mathematically,

V = k / P, k = PV

P1 × V1 = P2 × V2 = P3 × V3 =Pn × Vn

P1 × V1 = P2 × V2

Solve for P2

P2 = (P1 × V1) / V2

P2 = (640 × 2.0) / 8.0

P2 = 160mmHg

The final pressure of the gas is 160mmHg

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i think it is true since you can test the answer and can use observations to complete it.