1. The volume of a given mass of gas is 20cm when its pressure is 400mmHg. Calculate its pressure when the
volume becomes 80cm'at constant temperature,

Explanation:

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100 mmHg

Givens

V1 = 20 cm^3

V2 = 80 cm^3

P1 = 400 mmHg

P2 = ?

Formula

V1 * P1 = V2 * P2

Solution

20 * 400 = 80 * P2              Divide by 80

20 * 400/80 = P2

P2 = 8000 / 80

P2 = 100 mmHg

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