A mixture of two gases P and Q occupying volumes of 300cm(cube) and 100cm(cube) Respectively Exerts A Total pressure of 1800mmHg... What is the total pressure of Q?

Question

Pls i'd love to have the answer in a very detailed way🙇‍♂️

Answer 1

Volume of P = 300 cm³

Volume of Q = 100 cm³

Total volume = 400 cm³

The partial pressure of each gas is equal to its fraction of the total volume x the total pressure. So we have...

For P, 300 cm³ / 400 cm³ = 0.75 = fraction of total volume

For Q, 100 cm³ / 400 cm³ = 0.25 = fraction of total volume

Pressure of P = 0.75 x 1800 mm Hg = 1350 mm Hg

Pressure of Q = 0.25 x 1800 mm Hg = 450 mm Hg