A certain ore is 27.9'.9% nickel by mass. - 28544692. kilograms of this ore would you need to dig up to have 85.0 g85.0 g of nickel.
What is nickel ?Chemical element nickel has the symbol Ni and atomic number 28. It is a beautiful silvery-white metal with a faint golden hue. The transition metal nickel is hard and ductile. Although bigger particles of pure nickel are slow to react with air under typical conditions because an oxide layer builds on the surface and limits further corrosion, pure nickel that has been powdered to increase reactive surface area exhibits high chemical activity (passivation).
Yet pure native nickel is only occasionally found in the crust of the Earth, typically in ultramafic rocks and the interiors of bigger nickel-iron meteorites that were not exposed to oxygen during their time outside the Earth's atmosphere.
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draw the structure of the major product formed in the given reaction when the aromatic aldehyde is present in excess. an aldehyde and ester react with methoxide in methanol. the aldehyde consists of two fused benzene rings. if the top fused carbon is arbitrarily numbered 1 and the ring numbered clockwise, there is an aldehyde substituent on carbon 3 and a methoxy substituent on carbon 8. the ester is a carbonyl bonded to methyl and methoxy.
When combined with methyl acetate, the chemical 6-methoxy-2 naphthaldehyde undergoes an aldol addition reaction to produce methyl 3-hydroxy-3-(6-methoxynaphthalen-2-yl)propanoate. The aldol addition product undergoes dehydration to create the aldol condensed product, (E)-methyl 3-(6-methoxynaphthalen-2-yl)acrylate.
What is aldol condensation reaction?
In an aldol condensation, an enolate ion combines with a carbonyl molecule in the presence of an acid/base catalyst to produce either a hydroxylated aldehyde or ketone, which is then dehydrated to produce a conjugated enone. It is an effective process for creating carbon-carbon bonds.
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n‑methyl‑2‑pyrrolidone is an aprotic solvent used in many industrial processes. draw the structure of the product formed when it is heated with aqueous acid.
We will obtain the product 4-(methylamino)butanoic acid
What is industrial process?
Heavy industry comprises a sizable portion of industrial operations. They include manufacturing-related chemical, physical, electrical, and mechanical processes. Most often, it is employed in large-scale industrial initiatives. Companies use a variety of industrial processes to create or shape a product.
The idea behind the reaction between mathrmN and N-methyl-2-pyrrolidone serves as the foundation for this issue. An chemical molecule called N-methyl-2-pyrrolidone has a lactam with five members. NMP is the abbreviation for it. It is a useful substance that is employed in the recovery of hydrocarbons produced during the manufacturing of petrochemicals.
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Explanation:
how many moles of na₂so₄ are in a 0.140 m aqueous solution that was prepared with 2.30 kg of water ?
The moles of na₂so₄ are in a 0.140 m aqueous solution that was prepared with 2.30 kg of water is 0.00032moles
Moles and molarity of a substanceThe formula for calculating the molarity of a substance is expressed as;
molarity = moles/Volume
Given the following parameter
Molarity = 0.140M
volume = mass/density
Volume = 2.30/997 kg/m³
Volume = 0.0023m³
Determine the required moles
Moles of na₂so₄ = molarity * volume
moles of na₂so₄ = 0.140 * 0.0023
moles of na₂so₄ = 0.00032moles
Hence the moles of na₂so₄ are in a 0.140 m aqueous solution that was prepared with 2.30 kg of water is 0.00032moles
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A substance that gives up a proton during a chemical reaction, raising the hydrogen ion concentration of water, is most appropriately called.
A substance that gives up a proton during a chemical reaction, raising the hydrogen ion concentration of water, is most appropriately called acid.
What is an acid?An acid is a substance that produces hydrogen ion as the only positive ion produced in water. This is the Arrhenius definition of an acid. As such, the acid gives out a proton to water and oxonium ion is formed.
Thus, substance that gives up a proton during a chemical reaction, raising the hydrogen ion concentration of water, is most appropriately called acid.
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How+long+will+it+take+for+20+%%+of+the+c-14c-14+atoms+in+a+sample+of+c-14c-14+to+decay?
It will take 5730 years.
What is C-14 atoms ?The radioactive isotope of carbon with the symbol 14C, often known as radiocarbon, has an atomic nucleus made up of 6 protons and 8 neutrons. The radiocarbon dating technique, developed by Willard Libby and colleagues in 1949 to date archaeological, geological, and hydrogeological samples, is based on its presence in organic molecules.
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i need the answers pleaseee! this is acids and bases for chemistry
Answer:
for pH 13 it = strong based the ph 2 is= weak acid
Explanation:
Does the sun reproduce
Answer: no
Explanation:
It aint got the dingdong and besides whos the mommyy??
the sun produces high frequency waves like gamma rays.
In order to obtain funding for their research, scientists write
describing the proposed research and its costs.
a hypotheses
b research papers
C grant proposals
d email
Which bases can be used to deprotonate a terminal alkyne? choose all that apply.
NaNH₂ can be used to deprotonate a terminal alkyne.
An analogous term (pKa) can be used to describe the acidity of terminal alkynes because they are mildly (i.e. weak) acidic. In this case, too, the lower the pKa value, the stronger the acid.
Alkynes have pKa values of around 25, therefore sodium amide, or NaNH₂, is an excellent (strong, that is) base that can deprotonate them. Indeed, sodium amide does deprotonate terminal alkynes (it can be used for elimination reactions, too).
This is possible because the NH₂⁻ anion is the conjugate base of Ammonia (NH₃) and, as a general acid-base principle, the weaker the acid, the stronger its conjugate base (Conjugate acid). Since ammonia has a pKa of about 38, NH₂⁻ is indeed a very strong base.
Sodium amide can deprotonate terminal alkynes (and alcohols, too) and it is often used when an Acetylide ion (RC₂⁻) is needed. These ions are then extremely helpful intermediates in the synthesis of organic compounds because they can react in a wide range of reactions as nucleophiles.
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design an experiment discussing how you will determine what your unknown sample is using a flame test.
The flame test is used to visually determine identity of an unknown metal or metalloid ion based on characteristic color the salt turns the flame of a Bunsen burner. The heat of flame excites the electrons of the metals ions, causing them to emit visible light. Every element has a signature emission spectrum that can be used to differentiate the between one element and another.
How to Do Flame Test?First, you need clean wire loop. Platinum or nickel-chromium loops are the most common. They may be cleaned by dipping in the hydrochloric or nitric acid, followed by rinsing with distilled or deionized water. Test cleanliness of the loop by inserting it into a gas flame. If a burst of color is produced, loop is not sufficiently clean. The loop must be cleaned between the tests.
The clean loop is dipped in either a powder or a solution of an ionic (metal) salt. The loop with sample is placed in a clear or blue part of the flame and the resulting color is observed.
Key Takeaways: Perform Flame Test:
The flame test is qualitative test in analytical chemistry used to help identify the composition of a sample.The premise is that heat gives energy to the elements and ions, causing them to emit light at a characteristic color or emission spectrum.The flame test is a quick way to narrow down identity of a sample, but must be combined with other tests to confirm composition.To know more about flame visit: brainly.com/question/6871204
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A 5.00 l container is filled with 0.300 atm acetylene and 0.800 atm hydrogen, which react according to:____.
A 5.00 l container is filled with 0.300 atm acetylene and 0.800 atm hydrogen, which react according to: C2H2(g) + 2 H2(g) C2H6
what is a reaction?
A chemical reaction occurs when two or more molecules collide with the right orientation and enough force to produce a new product. Atomic bonds are created and disrupted throughout this process. Products, as opposed to reactants, are the compounds that result from an interaction between two other substances.
Substances are made up of chemical components or chemical elements. The atoms that make up the reactants in a chemical reaction are rearranged to create different products. A essential aspect of life itself, as well as technology and civilization, are chemical reactions.
0.300 atm acetylene and 0.800 atm hydrogen are placed in a 5.00 l container, where they react as follows: C2H2(g) + 2 H2(g) C2H6.
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Use dimensional analysis to solve the following: 2.3 mi =
2.3 miles is equal to 12093 ft.
1 mile =5280 ft2.3 miles = 2.3 x 5280= 12144 ft
1 ft= 12 in12144 ft = 12144 x 12 = 145728 in
3 ft = 1 yd12144 ft =. (1÷3) × 12144 = 4048 yd
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This question is incomplete, above explanation might help.
What do you call of force acting on the ball along the horizontal line or along the that makes the ball in motion
Tension force is the force applied on the ball in a horizontal direction or along the that makes the ball in motion
Tension force is the horizontal pulling force imposed on an object by a string, rope, or cable from the opposite end. The ball is linked to a string or rope in this scenario, which is exerting tension on the ballStretching the rope or string in an attempt to bring the ball closer to it creates tension force. The ball will have a tendency to overcome the force at this point, which is why the ball will move once the force is removed.To know more about Tension force visit : https://brainly.com/question/2287912
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Explain whether the cane sugar is hydrated.
Yes, the sugarcane is hydrated.
A species of long, perennial grass called sugarcane or sugar cane is used to make sugar. The plants have strong, jointed, fibrous stalks that are 2–6 m tall and rich in sucrose, which gathers in the internodes of the stalks. Your body is hydrated by sugarcane juice, which also helps you feel less tired in hot conditions. You can combat dryness with the help of the minerals, proteins, and carbs found in this drink.
Because sugarcane is high in antioxidants, it helps the body fight illnesses and increases immunity. Due to its high iron, magnesium, calcium, and other electrolyte content, it is excellent for dehydration. As it increases the body's protein levels, it helps the body fight fever as well as the common cold and other diseases.
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yes sugarcane is hydrate to get respected products of sugarcanes like juice , raw materials etc.
sugar cane is gathered and then treated with water to create raw juice, which has a low pH and dissolved contaminants. To increase the pH and react with the contaminants to create soluble calcium organic compounds that can be removed, hydrated lime is added to the juice. Lime excess is eliminated through carbonation or phosphoric acid addition. Depending on the needed level of final product purity, this process could be done numerous times.Two independent processes are involved in the production of sugar: (a) turning sugar cane or sugar beets into raw sugar, and (b) turning the raw sugar into refined sugar. The yield of the crystalline product is decreased by the presence of polysaccharides, proteins, starches, gums, waxes, and other colloidal contaminants in cane and beet sugar extracts, which also include unacceptable levels of sucrose.therefore the cane sugar is hydrated to get the following products.
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What proportion of z-scores fall between the z-score of -0.22 and a z-score of 1.7?
a) 0.4554
b) 0.0871
c) 0.5425
d) 0.4129
The proportion of z-scores fall between the z-score of - 0.22 and a z-score of 1.7 is 0.5425.
When assessed in terms of standard deviation units, a raw score's location in relation to its distance from the mean is indicated by a z-score. The z-score is positive when a value is above the mean and negative when a value is below the mean.
Because it standardizes the distribution, it enables comparison of scores on many types of variables, hence the name "standard score." A normally shaped distribution with a mean of 0 and a standard deviation (SD) of 1 is known as a standard normal distribution (SND).
The two z scores given are -0.22 and 1.7.
Now, according to the z score value table, we get;
For z score value - 0.22,
The area between the mean and z is 0.0871.
For a z score value of 1.7,
The area between the mean and z is 0.4554.
Then the proportion of z scores falling between the z score of - 0.22 and a z score of 1.7 will be:
0.0871 + 0.4554 = 0.5425
The correct option is (c).
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Which of the following photons frequency has the highest energy?
A. 8.02 x 10^-12
B. 23 x 10^-13
C. 20 x 10^13
D. 25 x 10^12
Explanation too please
Answer: 23 x 10^-13
Explanation:
Very long and large organic molecules called ___ are made of small units called ___.
Very long and large organic molecules called Polymer are made of small units called Monomer
polymer is a long molecule consisting of many similar or identical building blocks linked by covalent bonds on the other hand monomer is the building blocks that make up a polymer.
The mechanism of creating a polymer from monomers is chemically combining 2 monomers together by removing a water molecule called dehydration and thus creating a covalent bondhydrolysis is exact opposite of dehydration synthesis (add water to polymer to break polymer down into monomer)Cellulose is a structural polysaccharide. Major component of walls of plant cells.To know more about polymer visit : https://brainly.com/question/14600435
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Coenzymes such as ___________ are used to carry electrons to and from many kinds of oxidation/reduction reactions.
Coenzymes such as NADH and FADH2 are used to carry electrons to and from many kinds of oxidation/reduction reactions.
What are coenzymes?
A macromolecule that catalyses a chemical process is an enzyme. In other words, it creates the possibility of a negative reaction. Smaller molecules are used to construct enzymes to create an active component. The coenzyme is one of an enzyme's most crucial components.
Small molecules make up coenzymes. They are unable to catalyse reactions on their own, but they can assist enzymes in doing so. Coenzymes are organic nonprotein molecules that join with the protein molecule (apoenzyme) to create the active enzyme, according to the technical definition (holoenzyme).
In biological oxidation-reduction reactions, NADH and FADH2 are two coenzymes that are extremely important. Along with the transfer of electrons, hydrogen ions also occur.
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allows oxidation of co (carbon monoxide) to less-harmful co₂ (carbon dioxide) allows oxidation of hc (unburned hydrocarbons) to co₂ (carbon dioxide) and h₂o (water)
The oxidation of co (carbon monoxide) to less-harmful co₂ (carbon dioxide) and the oxidation of hc (unburned hydrocarbons) to co₂ (carbon dioxide) and h₂o (water).
What is oxidation?
One or more electrons are lost during the chemical reaction of oxidation, which takes place inside of an atom or molecule.
TWO-WAY CATALYTIC CONVERTERS
enables the conversion of carbon monoxide (CO) to the less hazardous gas CO2 (carbon dioxide)enables the conversion of unburned hydrocarbons (HC) to CO2 and H2O (water)This structure allows the chemical reaction to happen by directing exhaust fumes to travel through the substrate that is made of the precious metals platinum and palladium. As the conversion process proceeds, the temperature of the exhaust gases rises.
This process generates a great deal of heat, hence the exhaust gases that exit the converter should be hotter than the gases that enter it. This also explains why most units need to have heat shields.
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Calcium carbonate is a white solid with a density of 2.71 g/cm3. it reacts readily with an acid to produce gaseous carbon dioxide.
Calcium carbonate (CaCo3) is a white solid and gaseous with the density of 2.71 g/cm^3 that can be easily calculated or observed without a chemical reaction, so it is simply a physical property.
Now the second sentence says that it reacts readily with an acid to produce gaseous carbon dioxide.
Let's take a chemical reaction:
CaCO3( Calcium Carbonate) + 2HCl (Hydrochloric Acid) ----> CaCl2 (Calcium Chloride) + CO2 (Carbon Dioxide) + H2O (Water)
Hence it readily reacts with acids so it is clearly a chemical change and falls into chemical property.
Physical properties denote or comprises density, color, melting and boiling point where as chemical properties comprises of it goes in a particular chemical reaction and changes.
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The average interest rate for a savings account in 2021 is 0.4ompounding continuously. how long will it take to double your money? use your calculator to find the solution.
The average interest rate for a savings account in 2021 is 0.4 Compounding continuously. it will take 11.8 years to double your money
Equating :A = Peⁿt
50000/25000 = 25000e/25000
2 = [tex]e^{0.0588t}[/tex] ( e = 2.73)
(0.0588t)
ln = log[tex]_{e}[/tex]
ln(2) = ln([tex]e^{0.0588t}[/tex])
[tex]\frac{ln(2)}{0.0588}[/tex] = [tex]\frac{0.0588t}{0.0588}[/tex]
equating t in the equation we get ,t = 11. 788
t = 11.8 years.
So it'll take approximately 11.8 years for the investment to double if it's compounding continuously at 5.88%.
What is a good interest rate on a savings account?The best savings account interest rates are around 2%. At a brick-and-mortar bank, you'll often find savings rates closer to the national average, which is currently 0.13%.
What is better than a savings account?High-Yield Checking Accounts
There are high-yield checking accounts that provide better interest rates than savings accounts. a number of these checking accounts offer up to a 2% annual percentage yield, in contrast to lower bank account rates.
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Why is carbon-14 radioactive, while carbon-12 is not? Be sure to use the terms protons and neutrons in your answer for full credit.
this will be copied and pasted fyi
Carbon-12 and carbon-14 are two isotopes of the element carbon. The difference between carbon-12 and carbon-14 is the number of neutrons in each of their atoms, this is why one of them is radioactive and the other isnt
(Not sure)
Answer:
Carbon-12 is stable, meaning it never undergoes. radioactive decay. Carbon-14 is unstable and undergoes radioactive decay with a half-life of about 5,730 years (meaning that half of the material will be gone after 5,730 years)
How much heat, in kj, is produced by the amount of octane needed to drive 573 kilometers in a car that averages 22.8 km/l?
Combustion of octane
16 CO2(g) + 18 H2O = 2 C3H18(1) + 25 O2(g) (1)
ΔΗO -10, 932 kJ
What is combustion?
Combustion is the process of a substance burning in the presence of oxygen to produce heat and light.
You may have heard that some materials are combustible while others are not. Simply put, combustible compounds are those that go through this process.
Burning is actually referred to as combustion in science. Burning is a phenomenon that we are all familiar with, but did you realise that it is also a chemical reaction? Any fuel reacts chemically with air (an oxidant) during combustion to produce heat energy. Additionally, a flame will appear as a result of the release of heat energy.
Following complete combustion, octane (C,H,g, density = 0.699 g/mL) produces energy as shown by the following reaction:
16 CO2(g) + 18 H2O = 2 C3H18(1) + 25 O2(g) (1)
ΔΗO -10, 932 kJ
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how many protons, neutrons and electrons are there in a neutral atom of the isotope of chlorine named chlorine-35?
Taking into account the definition of mass number, atomic number and charge of an atom, the number of protons and electrons of the isotope of chlorine named chlorine-35 is 17, while the number of neutrons is 18.
Subatomic particlesAll atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them.
Atomic numberThe atomic number indicates the number of protons that are present in the nucleus of an atom.
If the atom is electrically neutral, the positive charge of the protons is balanced by the negative charge of the electrons. That is, the number of protons in the nucleus is equal to the number of electrons in its orbitals, so that in a neutral atom the atomic number also indicates the number of electrons.
Mass numberThe mass number indicates the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus.
Number of protons, neutrons and electrons in chlorine-35The atomic number of chlorine is 17, while the mass number of chlorine-35 is 35.
So, being a neutral atom, by definition of atomic number the amount of protons and electrons that the isotope of chlorine has is 17.
Finally, knowing the number of protons and the atomic mass of the isotope, the number of neutrons is calculated by:
35 =17 + number of neutrons
35 - 17 = number of neutrons
18= number of neutrons
In summary, the number of protons and electrons of the isotope of chlorine named chlorine-35 is 17, while the number of neutrons is 18.
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n‑methyl‑2‑pyrrolidone is an aprotic solvent used in many industrial processes. draw the structure of the product formed when it is heated with aqueous acid.
The structure of n‑methyl‑2‑pyrrolidone when it is heated with aqueous acid. product is given below
What is aprotic solvent?A polar solvent without an acidic proton is known as a polar aprotic solvent. These solvents don't include hydroxyl or amine groups. These solvents can act as proton acceptors, but unlike protic solvents, they do not act as proton donors in hydrogen bonding.
After being exposed to a strong aqueous acidic media and being heated, N-methyl-2-pyrrolidone opens up, forming a molecule with a carboxylic group at one end and a protonated nitrogen atom with a methyl group connected to it at the other.
Alcohol, water, hydrogen fluoride, formic acid, acetic acid, ammonia, methanol, ethanol, and other well-known substances are a few examples of polar protic solvents. Polar aprotic solvents, on the other hand, lack acidic protons and do not function as donors during hydrogen bonding.
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Write a brief passage describing a neutral atom of nitrogen-14 (N-14). Describe the number of protons, neutrons, and electrons in the atom, where each type of particle is located, and how the terms atomic number, mass number, and atomic mass are related to the particles
the passage describing a neutral atom of nitrogen-14 (N-14) is as follows:
Its nucleus comprises seven protons.
Its nucleus of it has seven neutrons.
Around the nucleus, there are seven electrons arranged in orbits.
Its protons make up its atomic number.
Protons and neutrons together make up their atomic mass.
What is nitrogen-14?
It is demonstrated that nitrogen-14 NMR spectra with spin I = 1 can be detected indirectly in powders spinning at the magic angle (MAS). The approach is based on the transmission of coherence to single- or double-quantum transitions of nitrogen-14 nuclei from a nearby nucleus with S = 1/2, such as carbon-13. Second-order quadrupole–dipole cross terms, also referred to as residual dipolar splittings, are responsible for coherence transfer. The second-order quadrupolar interactions of nitrogen-14 are shown to be responsible for the powder patterns in the two-dimensional NMR spectra. The nitrogen-14 quadrupolar coupling constant, CQ, and asymmetry parameter, Q, are obtained through spectra analysis. These variables may be connected to the solids' structure that contains nitrogen.
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An iron core is wrapped with a metal wire and connected to a battery. When it is placed between the poles of a magnet and an electric current passes through the wire, the coil rotates. Which device was built?
Answer:
What you created using the tightly wound wire around the nail is called a solenoid [ sōl -ë-noid]. When an electric current passes through the wire, it creates a magnetic field in the metal core (the nail). When the wire is wrapped around the iron nail and the battery is strong enough, you create a simple electromechanical solenoid.
Explanation:
If 9 serial dilutions are performed, each with a dilution of 0.1, what is the cumulative dilution?
Based on the number of serial dilutions and the dilution factor, the cumulative dilution is 1.0 × 10⁻⁹
What is serial dilution?Serial dilution is a dilution process in which successive repetitive dilutions are done of a substance in a solution using a constant dilution factor.
A dilution factor is the ratio in which the solution to be diluted and the diluent are combined.
Given that the 9 serial dilutions are performed, each with a dilution of 0.1, the cumulative dilution will be obtained as follows:
Cumulative dilution = 1 * 01 × 0.1 × 0.1 × 0.1 × 0.1 × 0.1 × 0.1 × 0.1 × 0.1 × 0.1
Cumulative dilution = 1.0 × 10⁻⁹
In conclusion, the cumulative dilution is obtained from the number of serial dilutions and the dilution factor.
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In exponential smoothing, the closer alpha is to ________, the greater the reaction to the most recent demand.
In the exponential smoothing, the closer alpha is to 1, the greater the reaction to the most recent demand.
What is exponential smoothing?Exponential smoothing is a way to smooth out data for the presentations or to make forecasts. It’s usually used for the finance and economics. If you have a time series with a clear pattern, you could use moving averages — but if you don’t have a clear pattern you can use the exponential smoothing to forecast.
Damping Factors
Perhaps one of the most confusing aspects of the exponential smoothing is the damping factor. Damping factors are used to smooth out graph and take on a value between 0 and 1. Technically, damping factor is 1 minus the alpha level (1 – α). But all you really need to know is the smaller alpha levels (i.e. larger damping factors), smooths out peaks and valleys more than larger alpha levels (smaller damping factors). Smaller damping factors also mean that your smoothed values are closer to actual data points than larger damping factors.
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