All categories

4 years ago

Which statement is true about radiocarbon dating?

Chemistry

2 answers:

luda_lava [24]4 years ago

8 0

the correct answer is c, c-14 has a half-life of 5, 730 years

spayn [35]4 years ago

7 0

Answer:

<h2>D. The half-life of C-14 is 5,730 years.</h2>

Explanation:

Radiocarbon dating is method used to determine the age of an animal or object which contains organic material. This can be done thanks to the properties of radiocarbon. Basically, it's a method to measure residual radioactivity, that means after the animal dies it stops exchanging carbon.

Now, one of the most common isotope is Carbon-14. Actually it's used so often that the radiocarbon dating is also called Carbon-14 dating. One of the characteristic of this isotope is that it has a half-life of 5,730 years. This means after an organism has been dead for 50,000 years, there's no enough isotopes to do the test with Carbon-14.

Therefore, the right answer is D.

You might be interested in

Zinc reacts with hydrochloric acid according to the reaction equation Zn ( s ) + 2 HCl ( aq ) ⟶ ZnCl 2 ( aq ) + H 2 ( g ) How ma

Katen [24]

Answer: 12.0 milliliters of 6.50 M HCl ( aq ) are required to react with 2.55 g Zn.

Explanation:

moles = $\frac{\text {given mass}}{\text {Molar mass}}$

moles of zinc = $\frac{2.55g}{65.38g/mol}=0.0390moles$

The balanced chemical equation is :

$Zn(s)+2HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)$

According to stoichiometry:

1 mole of zinc reacts with = 2 moles of HCl

Thus 0.0390 moles of zinc reacts with = $\frac{2}{1}\times 0.0390=0.0780$ moles of HCl

To calculate the volume for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}$ .....(1)

Molarity of $HCl$ solution = 6.50 M

Volume of solution = ?

Putting values in equation 1, we get:

$6.50M=\frac{0.0780\times 1000}{\text{Volume of solution in ml}}$

${\text{Volume of solution in ml}}=12.0ml$

Thus 12.0 ml of 6.50 M HCl ( aq ) are required to react with 2.55 g Zn

3 0

3 years ago

Sodium metal and chlorine gas are combined in a reaction to produce sodium chloride also known as table salt. What are the react

m_a_m_a [10]

Answer: sodium metal and chlorine gas

Explanation:

6 0

3 years ago

What goes in the rest of the atoms diagram ?

Montano1993 [528]

Answer:

c. Number of electrons

f. Isotope

Explanation:

8 0

3 years ago

What is environmental science and why is it important?

Reil [10]

Explanation:

Our environment is very important to us because it is where we live and share resources with other species. ... Environmental science enlightens us on how to conserve our environment in the face of increasing human population growth and anthropogenic activities that degrade natural resources and ecosystems.

6 0

3 years ago

Is this atom more likely to gain electrons or to lose electrons? Explain how you can tell

elena55 [62]

Answer:

Likely to gain electrons

Explanation:

The atom shown is likely to gain additional electrons to complete its electronic configuration.

Since this is a neutral specie, the number of protons and electrons are the same.
The atom has 16 electrons
the number of valence electrons is 6
If the atom gains two additional electrons, the octet configuration is attained
Also, the atom can lose 6 electrons to become an octet

The atom will prefer to gain additional 2 electrons to give an octet configuration.

5 0

3 years ago