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kotykmax [81]
3 years ago
9

When was the "Permian Era"?

Chemistry
2 answers:
timurjin [86]3 years ago
6 0
The Permian period lasted from 299 to 251 million years ago and was the last period of the Paleozoic Era.
klemol [59]3 years ago
4 0

Answer:

298.9 million years ago - 251.902  million years ago

Explanation:

It might be in the 2011 Earth Science Review Packet so maybe go check that out

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This exercise uses the radioactive decay model.
Anna11 [10]
For radioactive decay, we can relate current amount, initial amount, decay constant and time using:
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N/No = 80% = 0.8
0.8 = exp( -ln(2)/5730 x t)
t = 1844 years
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3 years ago
A similar chemical analysis is performed on a 200.0g sample of the sugar found in corn
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Answer:

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\% mass = \frac{80}{200} \times 100 = 40\%

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sweet-ann [11.9K]

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Please help! Don’t know if I’m right!!
kompoz [17]

Answer:e

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