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How many moles of helium are produced wh...

How many moles of helium are produced when 1 mole of `._(92)U^(238)` disintegrate into `._(82)Pb^(206)`?

Text Solution

Verified by Experts

Radioactive change is
`._(92)U^(238) rarr ._(82)Pb^(206)`
Decrease in mass = (238 - 206) = 32
Let the number of `alpha`-particles emitted be `x`.
`4x = 32 implies x = 8`
Thus, 8 moles of helium are produced when 1 mol of `._(92)U^(238)` disintegrates into `._(82)Pb^(206)`.
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