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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.
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PbO  +  CO  →  Pb + CO₂

Oxidation States of the Elements

      Reactants     Products

Pb       +2                   0

O       -2, -2               -4

C         +2                 +4

Since the oxidation state/number of Pb decreased, it is being Reduced.

Since the oxidation state/number of C increased, it is being Oxidized.

Explanation:

To determine the molarity, we have to find the number of moles in the volume given, and then extrapolate to find the number of moles that would be in 1 L.

Determine the moles in the given volume

moles of LiCl = mass ÷ molar mass

                       = 139.9 g ÷ 42.39 g/mol

                       = 3.30 mol

Find the moles in 1 L

    Since 930 mL of LiCl    =   3.30 mol

    then 1000 mL of LiCl    =   (3.30 mol × 1000 mL/L) ÷ 930 mL

                                           =  3.55 mol/L

Answer:

A- antimony

Explanation:

Answer:

A

Explanation:

Answer:

Explanation:

Answer:

Alcohol in Your Body

Alcohol reaches your brain in only five minutes, and starts to affect you within 10 minutes. After 20 minutes, your liver starts processing alcohol. On average, the liver can metabolize 1 ounce of alcohol every hour.

Explanation:

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answer: the variable part of an amino acid is the: SIDE CHAIN

Answer:

In this reaction, potassium atoms lose electrons to form positively-charged potassium ions (oxidation) and iodine atoms gain electrons to form negatively-charged iodide ions (reduction).

Explanation:

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In this process, iodine atoms get electrons to produce negatively charged iodide ions, whereas potassium atoms lose electrons to form positively charged potassium ions. Oxidation and reduction takes place.

Redox reactions include a change in the oxidation state of the substrate. Similar to how reduction is the acquisition of electrons while oxidation is the loss of electrons or an increase in the oxidation state.

An oxidation process takes place when oxygen interacts with a substance or an element. Another way to think of oxidation is as the process of removing hydrogen from the species of reactants. Molecule, atom, or ion oxidation is the process of losing electrons.

Because they generate new functional groups in molecules or alter existing functional groups, oxidation processes are crucial in the synthesis of organic substances.

Thus, the iodine atom also experiences a change. The iodide atom gets one electron during the reaction with potassium, leaving it with eight electrons at its outer energy level.

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No not at all because of its size and the amount of speed from the car. then the impact will be bad

Answer:

ionic

Explanation:

Iron(II) chloride, also known as ferrous chloride, is the chemical compound of formula FeCl2. It is a paramagnetic solid with a high melting point. The compound is white, but typical samples are often off-white

Answer:

Savory. Savory taste is caused by amino acids. It's commonly brought on by aspartic acid or glutamic acid. Occasionally, savory is also called “umami” or “meaty.”

Explanation:

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A thermos slows down the process of heat transfer as it minimizes the process of conduction and convection.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules ,

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Answer:

Energy

Explanation:

C6H12O6 is glucose and the primary function of glucose is to provide energy.

Answer:

p orbital

Explanation:

Answer:

A group is a vertical row on the periodic table and a period is a horizontal row on the periodic table.

Explanation:

Answer:

A group on the periodic table refers to the vertical arrangement of the elements while a period refers to the horizontal rows of elements

Answer:

The shape of a covalent molecule can be predicted using the Valence Shell Electron Pair Repulsion (VSEPR) theory. Very simply, VSEPR theory says that the valence electron pairs in a molecule will arrange themselves around the central atom (s) of the molecule so that the repulsion between their negative charges is as small as possible.

Explanation:

There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. Electron-pair repulsion play an important role in determining the molecular shape using VSEPR theory.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

The shape of a covalent molecule can be predicted using the Valence Shell Electron Pair Repulsion (VSEPR) theory.  VSEPR theory says that the valence electron pairs in a molecule will arrange themselves around the central atom (s) of the molecule so that the repulsion between their negative charges is as small as possible.

Therefore, electron-pair repulsion play an important role in determining the molecular shape using VSEPR theory.

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Answer:

A human cell is best described as typical animal cell.

Answer: Scientists work independently to form theories about the Earth without sharing d

Scientists work independently to form theories about the Earth without sharing data.

Solar system is defined as the grouping of the eight planets and their moons in orbit around the sun, as well as other smaller bodies like comets, asteroids, and meteoroids.

It can also be defined as the Sun's orbiting objects are confined by gravity to one system.

An orbiting collection of planets, meteors, or other celestial bodies is referred to as a star system.
The Sun, an ordinary star, the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto make up our solar system.

Our solar system is referred to as the "solar system" because our Sun is called Sol after the Latin word for Sun, "solis," and because anything related to the Sun is termed "solar."

Thus, scientists work independently to form theories about the Earth without sharing data.

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Answer:

because of the reflection that the Sun makes on the water after it rained.

bởi vì sự phản chiếu mà mặt trời tạo ra trên mặt nước sau khi trời mưa

Explanation:

The wavelength of the radiation whose frequency is 5 X 10^15s^-1 is 2.4 X 10^-6 inches, or 60 nanometers.

Answer:

When a liquid changes to gas, the particles absorb heat energy and they start vibrating faster and distance between them increases. On constant vibration, intermolecular forces decrease and particles start moving away from each other and change to gas.

Answer:

Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. The Earth's surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle.

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A standard unit of measurement is a quantifiable language that helps everyone understand the association of the object with the measurement. It is expressed in inches, feet, and pounds, in the United States, and centimeters, meters, and kilograms in the metric system.

Answer:

6 Electrons r smaller than a proton or a neutron

Answer:

1st and last one

Explanation:

Which of the flowing painting did Miss meacham set up against the bread counter?

Answer:

silver

Explanation:

is a chemical element with the symbol Ag (from the Latin argentum, derived from the Proto-Indo-European h₂erǵ: "shiny" or "white") and atomic number 47.

Answer:

I,II and III

Explanation:

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Answer:

l and III is the answer.

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Answer:

GUYS THIS RANDOM GIRL HANNAHJAXON DELETED ALL OF MY ANSWERS AND QUESTIONS ON MY ACCOUNT!!!

Explanation:

Answer:

Number of Energy Levels: 4

First Energy Level: 2

Second Energy Level: 8

Third Energy Level: 14

Fourth Energy Level: 2

Explanation:

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Answer:

4 energy levels

Explanation:

1st energy level = 2 electrons

2nd energy level = 8 electrons

3rd energy level = 8 electrons

4th energy level = 8 electrons

Answer:

Coloured candies?

Explanation:

How close the magnets are together and which direction the poles are pointed to