Question

a naturally occuring uranium ore contain D2 and CH4 in 1:8 mole ratio. if it is desired to enrich the D2 to 80% of the sample (by moles) making use of relative rates of effusion of D2 and CH4 isotopes. How many minimum effusion steps are required.

Answer 1

Number of atoms of 238U initially / Numbarof atoms of 238U finally = 4 / 3 = a / (a - x)

[∵ Initially one part lead is present with three parts Uranium]

∴ t = 2.303 / λ log α / (α – x )= 2.303 x 4. 5 x 109 / 0.693 log 4/3

= 1.868 x 109 years.

Answer 2

Answer:

5 effusion

Explanation:

see in picture mate