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miv72 [106K]
4 years ago
5

Compound made from oil

Chemistry
1 answer:
BartSMP [9]4 years ago
5 0
Compound that are made from oil are called petro chemicals,and cell membranes.
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Help please!!
frez [133]

Answer:

6.25%

Explanation:

Given data:

Half life of lutetium-117 = 6.75 days

Percentage remaining after 27 days = ?

Solution;

Number of half lives = Time elapsed / half life

Number of half lives = 27 days / 6.75 days

Number of half lives = 4

At time zero = 100%

At first half life = 100%/2 = 50%

At second half life = 50%/2 = 25%

At 3rd half life = 25%/2 = 12.5%

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Answer:

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