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maxonik [38]
3 years ago
6

The half life of Carbon 14 is 5500 years. How many years will pass for a 30 gram sample to reach 3.75 grams

Biology
1 answer:
sertanlavr [38]3 years ago
6 0
Half life is the time taken by a radioactive isotope to decay by half of its original mass. In this case the half life of carbon-14 is 5500 years. 
The original mass is 30 g and the new mass is 3.75 g. 
New mass = Original mass × (1/2)^n, where n is the number of half lives; 
3.75 = 30 × (1/2)^n
 1/8 = (1/2)^n
 n = 3 
Thus, the time taken will be; 3 × 5500 = 16500 years.

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Answer:

B. Neither technician​ A's nor​ B's assessment is accurate.

Explanation:

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Technician B is wrong because all coolants operate at neutral or basic pH range (pH equal to or greater than 7).

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The question has options that are given as below:

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Answer:

The correct answer is - A. Some potatoes would be more likely to have a genetic resistance to the disease and survive.

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3 years ago
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Answer:

1:1

Explanation:

What is the concentration of H+ ions at a pH = 7?

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What is the concentration of OH– ions at a pH = 7?

⇒ 0.0000001 mol/L  

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2 years ago
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