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lbvjy [14]
2 years ago
13

Plutonium-239 undergoes alpha decay and has a half-life of 24,000 years. After 72,000 years, how much of an initial 100.0 g samp

le will remain?
A. none
B. 50.0 g
C. 25.0 g
D. 12.5 g
Chemistry
1 answer:
dybincka [34]2 years ago
8 0
After 72000 years, the half life would have passed 3 times.

This means that (1/2)^3 = 1/8 of the original sample would remain.

The original sample is 100.0 g, meaning that 1/8 of the sample would be 12.5 g.

So, the answer is D.
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The correct option is D.

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6 0
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Answer:

Neutrons.

Explanation:

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<em>3. Carbon-14: it has an atomic mass of 14 with 6 numbers of proton and 8 numbers of neutron.  </em>

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