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Elis [28]
3 years ago
15

For the following isotopes that have missing information, fill in the missing information to complete the notation: 34 14X

Chemistry
1 answer:
krok68 [10]3 years ago
5 0

Answer:

For the following isotopes that have missing information, fill in the missing information to complete the notation: 34 14X  answer- 34/14 Si

                                           

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A wooden artifact from an ancient tomb contains 60% of the carbon-14 that is present in living trees. How long ago was the artif
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Answer:

The age of the sample is 4224 years.

Explanation:

Let the age of the sample be t years old.

Initial mass percentage of carbon-14 in an artifact = 100%

Initial mass of carbon-14 in an artifact = [A_o]

Final mass percentage of carbon-14 in an artifact t years = 60%

Final mass of carbon-14 in an artifact = [A]=0.06[A_o]

Half life of the carbon-14 = t_{1/2}=5730 years

k=\frac{0.693}{t_{1/2}}

[A]=[A_o]\times e^{-kt}

[A]=[A_o]\times e^{-\frac{0.693}{t_{1/2}}\times t}

0.60[A_o]=[A_o]\times e^{-\frac{0.693}{5730 year}\times t}

Solving for t:

t = 4223.71 years ≈ 4224 years

The age of the sample is 4224 years.

8 0
3 years ago
6.285×10^3 mg = _____? _____ kg
TiliK225 [7]
One kilogram is equal to one thousand grams. Further, one gram is equal to 1000 mg. The conversion is as shown below,
                    (6.285 x 10³ mg) x (1 g / 1000 mg) x (1 kg / 1000 g)
The numerical value of the operation above is 0.006285 kg. 
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Which of the following leads to a higher rate of diffusion?
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I thought the answer is d

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What action would you expect an atom of Aluminum to undergo?
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Answer:

C. Lose three electrons to have a full outer shell  

Explanation:

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It must either lose three electrons or gain five to achieve a stable octet.

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D. is wrong, for the same reason.

A. is wrong. If Al lost three electrons, it would be breaking into a stable inner shell.

C. is wrong. Al is a metal, so it will lose electrons in a reaction.

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Does seasonal temperature affect tides?
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