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lisabon 2012 [21]
3 years ago
14

Help please !! im not very good at science ):

Chemistry
1 answer:
frez [133]3 years ago
4 0
Vas happenin!!

1-
A: 4

B: 48

C: 10


2-

A: 20

B: 18

C: 27

D: 16

Hope this helps!


-Zayn Malik
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Element A has a half-life of 10 days. A scientist measures out 200 g of this substance. After 30 days has passed, the scientist
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N=N₀*2^(-t/T)

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t=30 d

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Answer:

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