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A certain radioactive isotope decay has ...

A certain radioactive isotope decay has `alpha`-emission,
`._(Z_(1))^(A_(1))X to ._(Z_(1)-2)^(A_(1)-4)Y`
half life of X is 10 days. If 1 mol of X is taken initially in a sealed container, then what volume of helium will be collected at STP after 20 days?

A

22.4 L

B

11.2 L

C

16.8 L

D

33.6 L

Text Solution

Verified by Experts

The correct Answer is:
c
After 20 days 0.75 mol helium will be formed.
`:.` Volume of helium at STP `= 0.75 xx 22.4 = 16.8 L`
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