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mafiozo [28]
3 years ago
8

The half life of carbon 14 is 5730 years what fraction of the original c14 would you expect to be present in a fossil that is 28

,650 years old
Chemistry
1 answer:
Bogdan [553]3 years ago
7 0
The half-life of a radioisotope describes the amount of time required for one-half of the isotope to decay into a daughter atom. After one half-life, 50% remains; after two, 25%, and so on.

To find how many half-lives have passed in 28,650 years, we can divide it by the time it takes for one half-life to pass. This reveals that five half-lives have passed.

HL ———— 1 2 3 4 5
% remain - 50 25 12.5 6.25 3.125

After 28,650 years or 5 half-lives, 3.125% of the original radioisotope remains in the fossil.
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When magnesium ions and chloride ions form a compound the chemical formula would be MgCl2 which means that for every 1 atom of Mg+ there would be 2 atoms of Cl- bonded. This would be proportional to units of moles.

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draw the structure of two acyclic compounds with 3 or more carbons which exhibits one singlet in the 1H-NMR spectrum
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Answer:

attached below

Explanation:

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3 years ago
The atomic weight of boron is reported as 10.81, yet no atom of boron has the mass of 10.81 amu. explain
aivan3 [116]
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3 years ago
If 25.0 g NO are produced, how many grams of nitrogen gas are used?
ivanzaharov [21]

Based on the assumption that the reaction involves N and O to produce NO, if 25.0 g of NO are produced, the amount of N gas used would be 11.66 grams

<h3>Stoichiometric calculation</h3>

From the equation of the reaction:

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Mole ratio of N to NO is 1:1

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More on stoichiometric calculations can be found here: brainly.com/question/8062886

7 0
2 years ago
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