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Maurinko [17]
2 years ago
10

Uranium-235 has a half-life of 713 million years. Would uranium-235 or carbon-14 be more useful for dating a fossil from Precamb

rian time? please help im lost on this and its due tomorrow!
Chemistry
1 answer:
Artist 52 [7]2 years ago
7 0

Uranium-235 which has a half-life of 713 million years will best suited in dating a fossil from Precambrian time.

<h3>What is a Fossil?</h3>

Thi8s is defined as a trace of an animal or plant of a past geologic age that has been preserved in Earth's crust.

The Precambrian time occurred around 4.6 billions years ago and Uranium-235 which having a half-life of 713 million years means it's more useful when compared to carbon-14 which has a half life of 5,370 years.

Read more about Fossil here brainly.com/question/11829803

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When both –NH2 and –COOH replace hydrogen atoms on the same carbon atom, a(n) ____ is formed. a. amine c. carboxylic acid b. ami
Mice21 [21]

-NH_{2} represents amine functional group and COOH represents carboxylic acid functional group. When these both functional groups are substituted onto a single carbon atom, then amino acid is formed.

The organic compound consists of -NH_{2} functional group and COOH functional group with a side chain is said to be an amino acid.

A: amine group is -NH_{2}.

C: carboxylic acid  group is COOH

B: amino acid represents -NH_{2} functional group and COOH functional group which are substituted onto a single carbon atom.

D: carbohydrate:  the general formula of carbohydrate is (CH_{2} O)_{x}.

Hence, amino acid is the correct answer.





4 0
3 years ago
What is the correct sequence of eras of the geologic time scale in order from oldest to youngest ?
finlep [7]

Answer:

it would be the 3rd

Explanation:

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Please tell me the answer I will mark you brainliest so please
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Use the given relationship to calculate the ionization energy of a thallium atom, given that radiation of 58.4 nm produces elect
Elenna [48]

The ionization energy is 1  × 10^-18 J

<h3>What is ionization energy?</h3>

The ionization energy is the energy required to remove an electron from an atom.

We have the following information;

wavelength of the photon = 58.4 nm

Speed of the electron = 2310 × 10^3 m/s

Since;

hv = I + 1/2mv^2

v = c/λ

hc/λ =  I + 1/2mv^2

I = hc/λ  - 1/2mv^2

I = (6.6 × 10^-34 × 3 × 10^8/58.4 × 10^-9) - (1/2 × 9.11 × 10^-31 × (2310 × 10^3)^2)

I = 1  × 10^-18 J

Learn more about ionization energy: brainly.com/question/16243729

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2 years ago
Which element would be the most reactive with K? Br, Na, Ar, or O? And how do you know?
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Ar I did this I think i got it right on edunuty
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