A sample of air consisting of n2 and o2

Asked by admin @ 17/08/2021 in Chemistry viewed by 347 People

A sample of air contains only o2, n2 and h2o. Its saturated with water vapours and total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of n2:o2 is 3:1. The partial pressure of n2 is?

Answered by admin @ 17/08/2021

Let the ratio of moles of N2 : O2 :H2O be 3:1:x

Partial Presure of any gas = Mole fraction * Total Pressure

Partial Pressure of H2O vapour = 40 torr

40 = Mole fraction of H2O * 640

Mole fraction of H2O = 40/640

x/(4+x) = 40/640

x = 4/15

N2 : O2 :H2O = 3 : 1 : 4/15
= 45 : 15 : 4

Partial Pressure of N2 = Mole fraction of N2 * 640

= 45/(45+15+4) * 640 = 450 torr

Take any three non-collinear points a b c and draw triangle a,b,c. through each vertex of the triangle draw a line parallel to the opposite side using ruler and compass

Asked by wiki @ 15/11/2022 in Mathematics viewed by 1530 persons

A sample of air consisting of n2 and o2

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