Diffusion, isn't this the formula I'm supposed to be using?

In summary, the molar mass of the unknown gas can be calculated using the formula M_unknown = (M_N2 * t_N2^2) / t_unknown^2, where M_N2 is the molar mass of N2, t_N2 is the diffusion time of N2, and t_unknown is the diffusion time of the unknown gas. By comparing the diffusion times of the two gases, we can determine which one is faster and therefore lighter.
  • #1
rocomath
1,755
1
A sample of an unknown gas takes 434 s to diffuse through a porous plug at a given temperature. At the same temperature, N2(g) takes 175 s to diffuse through the same plug. What is the molar mass of the unknown gas?

[tex]\frac {Rate_{A}}{Rate_{B}} = \sqrt {\frac {\mathcal{M}_{B}}{\mathcal{M}_{A}}}[/tex]
 
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  • #2
faster vs slower gas

which one is the faster gas? would the faster gas be the lighter or heavier gas?

try your equn this way

faster gas = sqrt (Mslower/Mfaster)
slower gas
 
  • #3
Yes the formula is correct but how are you using it? That is show what your getting
 
  • #4
ace123 said:
Yes the formula is correct but how are you using it? That is show what your getting
thanks, the answer doesn't even appear as one of the choices.
 
  • #5
what did you get as an answer?
 
Last edited:
  • #6
eli64 said:
what did you get as an answer?
i appreciate your help but i was really only concerned about the equation, thanks.
 

FAQ: Diffusion, isn't this the formula I'm supposed to be using?

What is diffusion?

Diffusion is the process by which particles or molecules move from an area of higher concentration to an area of lower concentration.

How does diffusion occur?

Diffusion occurs due to the random motion of particles, which leads to a net movement of particles from an area of higher concentration to an area of lower concentration.

What is the formula for diffusion?

The formula for diffusion is Fick's first law, which states that the rate of diffusion is proportional to the surface area, concentration gradient, and diffusion coefficient.

Can diffusion be affected by other factors?

Yes, diffusion can be affected by factors such as temperature, pressure, and the size and shape of the particles involved.

How is diffusion important in biology and chemistry?

Diffusion is essential in biology and chemistry as it is responsible for the movement of substances within and between cells, as well as the mixing of different substances in chemical reactions.

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