- #1
CharlieW95
- 3
- 0
Homework Statement
A meteor contains 2.45kg of plutonium-239. It has a half-life of 24065 years. Calculate:
a) The number of plutonium molecules currently present in the meteor (at. mass = 239.052)
b) How long ago the meteor struck the Earth if originally it contained 10kg of plutonium.
Homework Equations
no.atoms= mass/(atomic mass) x avagadro^' s no.(6.02x〖10〗^23)
N = No e-γt
where the decay constant, γ(gamma), and T1/2 are related by
γT1/2 = ln(2)
The Attempt at a Solution
I solved A, and achieved an answer of 6.16979x1024 particles.
I'm confused as to where to go from here.