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JAMB Chemistry 2017 Paper

Question : 35

Total: 49

The densities of two gases, X and Y are 0.5gdm^-3 and 2.0gdm^-3 respectively. What is the rate of diffusion of X relative to Y?

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Solution:

The rate of dimension of a gas inversely proportional to the square root of its molecular mass or its density, which is Graham's Law of diffusion of gas.

R ∝

\frac{1}{\sqrt{Mm}}

or R ∝

\frac{1}{\sqrt{D}}

Dx = 0.5gdm^-3, Dy = 2gdm^-3

\frac{K}{\sqrt{D}}

\sqrt{D}

= k

R₁

\sqrt{D_1}

= R₁

\sqrt{D_2}

R_x

\sqrt{D_x}

= R_y

\sqrt{D_y}

\frac{R_x}{R_y}

\frac{\sqrt{D_y}}{\sqrt{D_x}}

\frac{\sqrt{2}}{\sqrt{0.5}}

= 2.0

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