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vladimir1956 [14]
3 years ago
6

What is the technique for calculating the age of remains from the amount of C-14 that is left in once alive living things?

Chemistry
2 answers:
Marizza181 [45]3 years ago
5 0

Carbon 14 dating? is that one of your choices

NeX [460]3 years ago
5 0

Answer:

Radiocarbon dating

Explanation:

The radiocarbon dating method is used in order to determine the age of an object (fossil) by using the unstable radioactive Carbon isotopes. It is very widely used and is efficient for dating objects that are of very recent age.

The half life of Carbon-14 is approximately 5700 years. The half life is defined as the time required to decay half of its original composition. The carbon-14 is an unstable element and after it is completely decayed, it turns into Nitrogen-14, which is a stable element.

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Boron trifluoride is the correct name for compound BF3
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3 years ago
At a certain concentration of H2 and NH3, the initial rate of reaction is 0.120 M / s. What would the initial rate of the reacti
mel-nik [20]

The question is incomplete, here is the complete question:

The rate of certain reaction is given by the following rate law:

rate=k[H_2]^2[NH_3]

At a certain concentration of H_2 and [tex]I_2, the initial rate of reaction is 0.120 M/s. What would the initial rate of the reaction be if the concentration of [tex]H_2 were halved.Answer : The initial rate of the reaction will be, 0.03 M/sExplanation :Rate law expression for the reaction:[tex]rate=k[H_2]^2[NH_3]

As we are given that:

Initial rate = 0.120 M/s

Expression for rate law for first observation:

0.120=k[H_2]^2[NH_3] ....(1)

Expression for rate law for second observation:

R=k(\frac{[H_2]}{2})^2[NH_3] ....(2)

Dividing 2 by 1, we get:

\frac{R}{0.120}=\frac{k(\frac{[H_2]}{2})^2[NH_3]}{k[H_2]^2[NH_3]}

\frac{R}{0.120}=\frac{1}{4}

R=0.03M/s

Therefore, the initial rate of the reaction will be, 0.03 M/s

5 0
3 years ago
Tungsten is used in light bulbs because its high...
lara [203]
Tungsten is used in light bulbs because of its high melting point.

It is also used because it has the lowest vapor pressure and greatest tensile strength.
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Answer:

<em></em>(B) Carbon Dioxide<em></em>

Explanation:

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Hope this helps :)

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