# Chemistry

posted by .

Enriched uranium is produced via gaseous diffusion of UF6. Suppose a process were developed to allow diffusion of gaseous uranium atoms, U (g). Calculate the ratio of diffusion rates of U235 and U238, and compare it to the ratio for UF6 given in the essay.

• Chemistry -

What essay are you talking about?

The diffusion constant D, which is proportional to the diffusion rate, is proportional to sqrt(1/M), where M is the molecular or atomic weight.

You are probably supposed to compare sqrt(238/235) with sqrt(352/349).
The former applies to the atomic vapor and the latter applies to the hexafluoride.

## Similar Questions

1. ### Chemistry

Uranium-235 can be separated from U-238 by fluorinating the uranium to form UF6 (which is a gas) and then taking advantage of the different rates of effusion and diffusion for compounds containing the two isotopes. Calculate the ratio …
2. ### Chemistry helpppp!!!!

How to calculate the ratio of diffusion of Br2 molecules to that CI2 molecules at the same temp. The rate of diffusion is 0.67 So how would I get the ratio?
3. ### Calculus disaster

Uranium ore has two main isotopes, mostly U-238 with just a trace amount of U-235. In a sample of Uranium ore, 99.85% of the atoms are U-238 atoms and 0.15% are U-235 atoms. Before the Uranium can be used in a nuclear power plant, …
4. ### 11th grade AP Chemistry

Pretend you are a nuclear scientist and try to answer this bonus question. Uranium -235 (235U) is used as a fuel in nuclear power plants. However, natural uranium contains mostly U -238 (238U) and very little uranium -235. Therefore, …
5. ### AP Chem

Pretend you are a nuclear scientist and try to answer this bonus question. Uranium -235 (235U) is used as a fuel in nuclear power plants. However, natural uranium contains mostly U -238 (238U) and very little uranium -235. Therefore, …
6. ### AP Chemistry

One way of separating oxygen isotopes is by gaseous diffusion of carbon monoxide. The gaseous diffusion process behaves like an effusion process. Calculate the relative rates of effusion of 12C16O, 12C17O, and 12C18O. Name some advantages …
7. ### Physical science

Why can't naturally occuring uranium be used in a nuclear power plant?
8. ### Chemistry

Uranium-235 can be separated from U -238 by fluorinating the uranium to form UF 6 which is a gas) and then taking advantage of the different rates of effusion and diffusion for compounds containing the two isotopes. Calculate the ratio …
9. ### Chemistry

1. Suppose o2, n2 and Ar were placed at 1.00 atm and 273 K in closed containers. A tiny hole is opened in each container, allowing each gas to diffuse into another container filled with neon gas. What is the ratio of the rate of diffusion …
10. ### AP Chemistry

Suppose the three gases were placed at 1.00 atm and 273 K in closed containers, as shown below. A tiny hole is opened in each container, allowing each gas to diffuse into another container filled with neon gas. What is the ratio of …

More Similar Questions