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astraxan [27]
2 years ago
12

I NEED THIS ANSWER QUICK

Chemistry
1 answer:
AVprozaik [17]2 years ago
4 0
The answer is a!..................
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Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.
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The answer to this question would be: 3.125%

Half-life is the time needed for a radioactive molecule to decay half of its mass. In this case, the strontium-89 is already gone past 5 half lives. Then, the percentage of the mass left after 5 half-lives should be:
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In a chemical reaction, an atom of lithium (Li) loses an electron, and an atom of chlorine (Cl) gains an
Blababa [14]

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a

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Draw the product of the reaction between CH3CH=CHCH3 and H2 under a platinum catalyst.
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CH₃CH₂-CH₂CH₃

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Thus, the reaction of CH₃CH=CHCH₃ with H₂ under a platinum catalyst produce:

<h3>CH₃CH₂-CH₂CH₃</h3>

The analogue alkane

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