PLS HELP ASAP!
How many years?
The radioactive isotope carbon-14 is used for radiocarbon dating. The half-life of carbon-14 is 5.73×103 years.
A wooden artifact in a museum has a 14C to 12C ratio that is 0.745 times that found in living organisms. Estimate the age of the artifact.
use graph
Answers
Answer:
about 5 years i think
Explanation:
I've tried all the methods i know
it's about 5 years
hope it helps
The age of the artifact is equal to 2.5 × 10³ years when the half-life of carbon- 14 is 5.73 × 10³ years.
What is the half-life period?The half-life of a radioactive element is defined as the time that is required to decrease the original quantity of a radioactive isotope to half after decay.
The half-life of a radioactive isotope is the feature of the element and does not depend upon the actual amount of the radioactive isotope.
Given, the ratio of the initial and left amount of ¹⁴C is :
N = 0.745 N₀
The half-life period of the ¹⁴C isotope = 5.73 × 10³ years
The rate constant of the decay of radioisotope can be calculated from the below-mentioned formula:
[tex]\displaystyle k=\frac{0.693}{t_{1/2}}[/tex]
[tex]\displaystyle k=\frac{0.693}{5.73 \times 10^3}[/tex]
k = 0.123 × 10⁻³ yr⁻¹
The age of the artifact can be calculated as:
[tex]\displaystyle t =\frac{2.303}{k} log\frac{N_0}{N}[/tex]
[tex]\displaystyle t =\frac{2.303}{0.123\times 10^{-3}} log\frac{N_0}{0.735 N_0}[/tex]
t = 2.5 × 10³ years
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Related Questions
The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true about the object's motion?(1 point)
o The acceleration is constant and non-zero.
o The velocity is constant and non-zero.
o The velocity is zero.
o The acceleration is negative.
Answers
Answer:
The velocity is zero
The interpretation of a position-time graph is required.
The correct option is The velocity is zero.
In a position time graph the y axis denotes the position and x axis denotes the time.
A horizontal line where [tex]y\neq 0[/tex].
This means that the points of the line will be for some value of x, the y value will always be constant.
The slope of a position-time graph will gives the velocity of the object.
Slope is given by
[tex]m=\dfrac{\Delta y}{\Delta x}[/tex]
Here, since the graph is a horizontal line, [tex]\Delta y=0[/tex]
[tex]\Rightarrow m=\dfrac{0}{\Delta x}=0[/tex]
The velocity of the person will be zero.
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A formula unit represents the simplest ratio of elements in a
Answers
Answer:
formula unit
Explanation:
formula unit represents the simplest ratio of elements.
*20 points* Pls answer following the rules of :No files
No links
No inappropiate responce
clean comments
Thank you!!
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are not chemically combined.
Question 5: Coke, Aluminum foil, chicken noodle soup, Gatorade
How many moles of Ag contain 4.49 x 1023 atoms Ag?
Answers
Answer:C, 0.746 mol Ag.
1 mol Ag = 6.022 x 1023 atoms of Ag -> 4.49 x 1023 atoms of Ag x 1mol Ag/6.022 x 1023 atoms -> 0.746 mol Ag
Explanation:
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.746 mol of Ag contain 4.49 x 10²³ atoms Ag.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms of Ag=4.49 x 10²³ atoms
Substituting the values
mole= 4.49 x 10²³ ÷ 6.022×10²³
mole = 0.746 mol
Therefore, 0.746 mol of Ag contain 4.49 x 10²³ atoms Ag.
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an item composed of at least 3 identifiable different compounds
Answers
Meat or fish spoilage is often due to spoilage bacteria which utilize. to grow in population.
glucose and free amino acids.
glucose
free amino acids
sulfides
Answers
Answer:
glucose and amino acids
Explanation:
Convert 3,526 meters (m) into kilometers (km). (Don't forget units)
EN
Voranean
Answers
Answer:
3,526 meters (m) into kilometers (km) = 0.003526 kilometers
Explanation:
Nitrogen has 5 electrons in its valence shell. How many more electrons will it likely gain? As a result, what charge will the Nitrogen in the above problem have?
Answers
Answer: 3 electrons; charge = -3
Explanation:
Nitrogen will likely gain 3 electrons.
Nitrogen will therefore carry a charge of -3. (since gaining electrons causes a negative charge.
Are cations nonmetals
and anions are metals?
Answers
Answer:
First, each element that forms cations is a metal, except for one (hydrogen), while each element that forms anions is a nonmetal. This is actually one of the chemical properties of metals and nonmetals: metals tend to form cations, while nonmetals tend to form anions. Are positive ions metals or nonmetals?
Explanation:
Read the article by Michael Fumento, writer for the New York Post editorial blog, who does not support global warming.
Back in 2005 I and others reviewed the entire hurricane record, which goes back over a century, and found no increase of any kind. Yes, we sometimes get bad storms—but no frequently now than in the past. The advocates simply ignored that evidence.
Fact is, the earth was cooling and warming long before greenhouse gases could have been a factor. The [global warming supporters] have been proved wrong time and time again.
Which best describes the reliability of the source?
Nationally certified organizations are considered an unreliable source because the public can access their information.
Charities are considered a reliable source because the public makes financial contributions to them.
Editorial blogs are considered an unreliable source because the author may not have a science background.
Editorial blogs are considered a reliable source because authors contribute to them regularly.
Answers
The editorial blogs are considered an unreliable source because the author may not have a science background. Option C
What the reliability of a source?We know that not all sources of information could be taken to be reliable. A source of information could come across as being reliable when the source is an authority in the area in which the information is furnished.
Such authorities often publish authentic and verified information in reputable journal that are meant for professional consumption.
Thus, the editorial blogs are considered an unreliable source because the author may not have a science background.
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distinguish between the crust and and the lithosphere
Answers
Answer:
What is the difference between the crust and lithosphere? The crust (whether continental or oceanic) is the thin layer of distinctive chemical composition overlying the ultramafic upper mantle. ... The lithosphere is the rigid outer layer of the Earth required by plate tectonic theory.
Explanation:
during a chemical reaction when the products of that reaction require less potential energy describe what happens to the surroundings?
Answers
Could someone help me pls
Answers
Answer:
a) dispersion
b) draw the path ray of green light between the red and violet path rays
c) greater/faster
Explanation:
b) Order of rainbow colours:
RedOrange YellowGreenBlueIndigoVioletc) Violet is the most refracted colour while red is the least refracted colour; the colour with a greater speed is the most refracted
Which choice is an element? carbon dioxide water carbon air
Answers
Answer:
carbon
Explanation:
Considering the definition of elements ans compounds, carbon is an element.
Elements are simple substances that cannot be broken down by common chemical methods. The atoms in an element are the same as each other, yet they are different from those in other elements. In addition, the elements are represented by a symbol and can be found in the periodic table.
On the other hand, compounds are substances that are the result of the chemical union of two or more elements. This combination makes it impossible to identify each element by its individual and original properties. Compounds can be separated by chemical action.
In summary, the element is a pure chemical substance formed from an atom, which is characterized in that it cannot be divided or transformed by a chemical reaction. Whereas a compound is a pure chemical substance made up of a particular set of molecules or ions that are chemically bound together.
So, being:
carbon dioxide: composed of carbon and oxygen water: composed of two atoms of hydrogen and one of oxygenair: composed mainly of oxygen and nitrogenthen, carbon is an element.
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https://brainly.com/question/20716171?referrer=searchResultshttps://brainly.com/question/13654839?referrer=searchResultswhich tissue carrys messages to and from the brain
Answers
Answer:
nervous tissues
Explanation:
Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. ... The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells. These cells have three principal parts: the dendrites, the cell body, and one axon
credits to the person who provided this info.
Helpp meeee the picture is above.
Answers
Answer:
a) 2.7 g cm³
b) 10.2 g
Explanation:
a) Density = Mass/Volume
= 21.6/8.00
= 2.7 g cm³
b) Mass = Volume × Density
= 2.55 × 4.0
= 10.2 g
Someone pls help me I will make you brain
Answers
Answer:
C. negative global warming
Soraya left some soup in the refrigerator. She looked at the soup every day, but she always decided not to eat it. After five days, she started to see mold growing on the surface of the soup. She looked up mold online and found that mold is made of fungal cells. Why didn't Soraya see the mold growing on the soup before the fifth day? Why can she see it now?
Answers
Explanation:
In general, the longer that moisture is present, the greater the chance for mold to grow and spread. When mold spores encounter a moist surface, it starts growing within a few hours, spreading into the material while also filling the air with thousands of mold spores.
Fill in the blanks for the following statements:
Different isotopes of the same element have the same number of
in the nucleus, but different numbers of
in the nucleus. This means that isotopes have different atomic
You can calculate the
lons are atoms with a charge that is not
in the nucleus and
charge of an atom by adding the number of
in the cloud,
subtracting the number of
Answers
Answer:
gctcuv
Explanation:
jygciutvguv
MAKE A POSTER OR SLIDES OF THE FOLLOWING INFORMATION
Important Details:
Due Date: October 8, 2021
Maximum group size: 2
Information to Include:
Origin –
ð Date of discovery
ð Discoverer
Background – Use these aspects of your element to describe your superhero (if you can’t think of how to show one of these, you could always use it as decoration on their costume):
ð: Name of the element
ð Element symbol
ð Atomic number
ð Atomic mass
ð Number of protons
ð Number of electrons (in a neutral atom)
ð Number of neutrons
ð Drawn picture of atom (YOU MUST DRAW IT)
ð Boiling point
ð Melting point
ð State of matter (at room temperature)
ð Uses for element
ð Type of element (metal, nonmetal, metalloid)
ð Group name (halides, lanthanides, noble gases, etc.)
ð Other elements in group
MUST BE COLORFUL AND DETAILED
Project Format (choose ONE):
Poster
Slides
flyer
Pamphlet
Criteria
4-5
3-3.99
2-2.99
0-1.99
Origin
All of the components for the origin criteria are present, explained fully, and are related to the context in an appropriate manner.
One component is missing; or, some components are not clearly explained.
Two components are missing; or, several components are not clearly explained.
More than two components are missing, or all components are not clearly explained.
Background
All of the components for the background criteria are present, explained fully, and are related to the context in an appropriate manner.
One component is missing; or, some components are not clearly explained.
Two components are missing; or, several components are not clearly explained.
More than two components are missing, or all components are not clearly explained.
Powers
All of the components for the criteria of the power are present, explained fully, and are related to the context in an appropriate manner.
One component is missing; or, some components are not clearly explained.
Two components are missing; or, several components are not clearly explained.
More than two components are missing, or all components are not clearly explained.
Other Heroes/Villains
All of the components for the other heroes/villains criteria are present, explained fully, and are related to the context in an appropriate manner.
One component is missing; or, some components are not clearly explained.
Two components are missing; or, several components are not clearly explained.
More than two components are missing, or all components are not clearly explained.
Work Quality
The work is of high quality, clean, neat, and easy to follow.
One component is missing; or, some components are not clearly explained.
Two components are missing; or, several components are not clearly explained.
More than two components are missing, or all components are not clearly explained.
Individual Contribution
The individual participated equally with their partner in the project with little to no drama and minimal prompting.
The individual participated in the project but was slightly less than an equal partner. May have required prompting to participate.
The individual participated, but was less than an equal partner, or required multiple prompts to participate.
Little to no participation in the project, requiring many prompts.
Score:
/30
Answers
Answer:
This is something you have to do yourself. The teacher is even letting you have a partner. Nobody is going to do this project for you because it´s your responsibility to finish it on your own.
Explanation:
PLEASE HELP !
How does the chemical structure of ionic liquids make them more flexible for scientists to use and what will most likely be the first industrial application of them?
Answers
Explanation:
Ionic liquids offer numerous advantages over conventional organic solvents for carrying out organic reactions, Malhotra notes. "In many cases, product recovery is easier, catalysts can be recycled, and the ionic liquids can be reused," he says. "In addition, their thermodynamic and kinetic behavior is different.
can evaporated milk be substituted for heavy cream?
Answers
Answer:yes
Explanation:
Use the equation to answer the question.
CH4 + _____Cl2 → CCl4 + _____HCl
Which numbers balance this equation?
Answers
The whole Balanced Reactions Quick Check for Honors Chemistry A is
1) A. The reactants and products have the same number and type of atoms, but the atoms may be recombined.
2) B. It shows how many molecules there are of a particular substance.
3) D. NaOH + HCl → NaCl + H2O
4) A. Atoms always remain intact during chemical reactions.
5) D. 4, 4
The balanced chemical equation is:
CH₄ + 4Cl₂ —> CCl₄ + 4HCl
The numbers that balanced the equation are: 4, 4
To know the number that balanced the equation, we shall simply balance the equation.
CH₄ + Cl₂ —> CCl₄ + HCl
There are 4 atoms of H on the left side and 1 atom on the right side. It can be balance by writing 4 before HCl as shown below:
CH₄ + Cl₂ —> CCl₄ + 4HCl
There are 2 atoms of Cl on the left side and a total of 8 atoms on the right side. It can be balance by writing 4 before Cl₂ as shown below:
CH₄ + 4Cl₂ —> CCl₄ + 4HCl
Now, the equation is balanced
The numbers that balanced the equation are 4,4
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Someone pls help me I will make you brain
Answers
Answer:
2 and 3 is the answer because Methane is emitted from a variety of anthropogenic (human-influenced) and natural sources. Anthropogenic emission sources include landfills, oil and natural gas systems, agricultural activities, coal mining, stationary and mobile combustion, wastewater treatment, and certain industrial processes
Sam wants to know how fast his brother can run. He knows the time it took for his brother to run
from the starting line to the finish line. What else does he need to know in order to calculate the
speed of his brother?
O He needs to know what time his brother ate lunch.
O He needs to know the direction his brother ran.
O He needs to know the distance from the starting line to the finish line.
Answers
Which of the following represents the velocity of a light wave?
O A. E = fx2
O B. c = hxf
O C. E = hxf
O D. c = fx2
Answers
Answer:
D. c = fλExplanation:
c = fλ
where" c "is the speed of light ,
• "f" is the frequency of the electromagnetic waves,
• " λ" is its wavelength.
The term that represents the velocity of a light wave is c = fx2. The correct option is D.
What is velocity?Velocity is the speed by which an object moves or do any motion. When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.
Light waves are the movement of waves in a direction. There are two types of transverse and electromagnetic. They are divided on the way of their movement.
The velocity of the light wave is the speed at which the light wave moves in a specific direction in time. The formula is given below:
c = fλ
Where c is the speed of light.
f is the frequency of the electromagnetic waves,
λ is its wavelength.
Thus, the correct option is D. c = fx2.
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In a chemical reaction, the arrangement of atoms blank a reaction are rearranged blank the reaction.
Answers
Answer:
i dont care to you
Explanation:
cause you are tuyo
Emma strikes a match and sets some logs on fire. As the fire burns, which two forms of energy are released?
Answers
Answer:
Explanation:
There are changes in the chemical composition of the word.
There's light energy given off.
There's heat energy given up.
what type of solute causes the hydrogen ion concentration of a solution to decrease, which results in a high ph value?
Answers
Answer:
basic
Explanation:
like water to an acid or na2co3 or even diluting an acid causes its ph to increase
how much energy is released when 23 g of steam at 100 Celsius is condensed into liquid water?
Answers
H = mc∆T
H = 23g * 4.2J/g°C *(100°C - 0°C)
H = 9660 J
H = 9.66 KJ.
The energy released is 9.66 KJ.
