There are two primary methods for producing ethers: dehydration of alcohols or the Williamson Synthesis.
Williamson's synthesis, which involves reacting an alkoxide with a haloalkane, can be used to make acyclic ethers.
Alcohols dehydrate in the presence of protic acids (sulphuric acid) to produce alkenes and ethers under different conditions.
Dehydration of ethanol at 443 K, for example, yields ethene in the presence of sulphuric acid, whereas it yields ethoxyethane at 413 K.
The most common ether reaction is the cleavage of the C-O bond by strong acids. The ether oxygen is protonated during acidic cleavage to form good leaving groups that can be eliminated as part of an SN2, SN1, or E1 reaction mechanism.
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brass is the solution in which a solid is dissolved in a(n)
Brass is the solution in which a solid is dissolved in a solid
What is solution?If we talk about a solution we know that something have been dissolved in another. This is the key conscept when we talk of a solution. We often think of teh dissolution of a solid olr a gas in a liquid when the word solution does pop up.
Has it ever occured to you that a solid can also be dissolved ion a solid? Oh yes! This is what we call the alloys. There is an alloy when there is the solution of a solid in a solid such as brass.
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Brass is the solution in which a solid is dissolved in a solid and is therefore denoted as option D.
What is a Solid?
This is one of the four fundamental states of matter and the molecules are usually closely packed together and contain the least amount of kinetic energy.
Brass is a solution of zinc in copper. Brass is proposed by mixing molten zinc with molten copper and cooling their mixture which brings about them being homogenous.
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The full question:
brass is the solution in which a solid is dissolved in a(n)Select one:
a. gas
b. liquid
c. water
d. solid
if such an isotope existed, which one would be best to use for establishing the age of an archeological site that is about 50,000 years old?
Researchers frequently employ radiocarbon dating to establish an archaeological site's age.
The basis for this technique is the radioactive decay of carbon-14 (14C) into nitrogen-14 (14N). The best results from radiocarbon dating come from materials that are older than 50,000 years.
If an isotope with a half-life longer than carbon-14 were to exist, it would probably be based on the decay of a radioactive isotope that was suitable for dating materials older than 50,000 years. For this reason, isotopes like aluminum-26 and beryllium-10 are being researched. These isotopes haven't been employed for dating in a lot of places, though.
In conclusion, there isn't a single "optimal" isotope for dating archaeological sites that are 50,000 years or older. The most popular technique for this is radiocarbon dating, however other approaches are being researched for use in dating ancient materials.
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__________ electrons are the most important electrons to an atom.
Responses
A InnerInner
B OuterOuter
Answer:
B
Explanation:
B. The outer outer electron (valence electrons)... It is more important to an atom's chemical properties.
Police are investigating the murder of Mr. Trevor Reed. Mr. Reed had a large life insurance policy. Why would the police MOST likely want to know
about this policy?
A.
If Mr. Reed left a lot of money for his family, they would never harm him.
People who would likely benefit from the policy might become suspects.
B.
C.
His policy would list doctors who could supply information about his health.
D. Investigators are in charge of distributing assets to family after someone dies.
The policy's likely beneficiaries could turn out to be suspicions.
What is the largest life insurance?With more than $70 billion in premiums in 2021, State Farm will be the largest provider of property and liability insurance in the country. Whole life insurance, universal life insurance, and term life insurance are the three main types.Limited payment, modified, single-premium, and variable whole life are some of the variants of whole life insurance.Guinness book of records holder: According to Guinness World Records, the most expensive life insurance policy ever sold is on the life of a well-known U.S. millionaire who lives in California's Silicon Valley and is well-known in the technology industry. The policy is valued at a total of $201 million.Term life insurance can be the best option if staying within your financial means is your top priority. if you are a parent to many children.
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Which compound has the lowest boiling point?(a) CH3CH2OH(b) CH3CH2CH3(c) CH3OH.
The compound has the lowest boiling point is the correct option is (a) CH₃CH₂CH₃ compound.
The boiling point depends on the intermolecular force of the attraction. The stronger the intermolecular force of the attraction , the higher will be the boiling point of the compound. The intermolecular force present in the methanol and the ethanol present is the hydrogen bonding. The hydrogen increases the boiling point of the compound.
The hydrogen bonding is absent in the CH₃CH₂CH₃ that is propane, therefore this compound has the lowest boiling point. The ethanol has the higher boiling point.
Thus , propane has the lowest boiling point among the other compounds.
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Which of the following statements are true of chemical reactions?
a. In a synthesis reaction, bonds are formed.
b. The body's chemical reactions take place in water.
c. Synthesis reactions are directly necessary for energy release from food.
d. In a decomposition reaction, bonds are broken.
e. Digestion of food involves decomposition reactions.
f. The ionization of a molecule of sodium chloride is a synthesis reaction.
Answer: the answers are A, B, D, E, and F
How does the replacement of hydrogen with fluorine alter the properties of the compound?
The replacement of hydrogen with fluorine alter the properties of the compound by increasing the density.
Fluorine has special (and frequently significant) properties that are present in organic compounds where some or all of the hydrogen atoms are substituted. Because the C-F bond energy is higher than the C-H bond energy , fluorocarbon compounds have a high degree of kinetic stability but may not be particularly thermodynamically stable.
The density is increased when hydrogen is replaced with fluorine because fluorine's small size means that the substitution causes the least amount of deformation or structural change. Similar to metal salts, fully fluorinated organic molecules have low boiling temperatures due to the weak intermolecular interactions. For fluoropolymers like polytetrafluoroethylene, which is widely used, the low coefficient of friction is one characteristic of the low inter-molecular forces.
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the compound cacl2 is made up of which ions?
The compound CaCl₂ is made up of the ions : the cation is Ca²⁺ and the anion is 2Cl⁻.
The dissociation of the compound , calcium chloride ( CaCl₂) :
CaCl₂ ------> Ca²⁺ + 2Cl⁻
The ions present in the compound , calcium chloride is :
The cation is Ca²⁺
The anion is 2Cl⁻
The calcium chloride is an ionic compound. The ionic compound is the compound is formed between the positively charged species cation and the negatively charged species called as anion. The ionic compound is formed by the complete transfer of electrons from the one atom to the other atom.
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Atoms of the same element that contain different numbers of neutrons are called _____.
Isotopes.
Atoms of the same element that have different numbers of neutrons but the same number of protons are called Isotopes.
how many oxygen atoms are in 20 molecules of dinitrogen tetroxide, n₂o₄?
There are 80 oxygen atoms present in 20 molecules of dinitrogen tetroxide, N₂O₄.
Steps to be followed to calculate the number of atoms.
For calculating the number of atoms first step is to calculate the number of moles.If the mass of an element or a compound is given then divide the given mass by the molar mass of the element or the compound to find the number of moles.In 1 mole of a substance, the number of atoms denoted as N which equals to 6.023 × 10²³ atoms.Multiply the given moles with N to find the total number of atoms.In one molecule of N₂O₄, 4 oxygen atoms are present.
In 20 molecules of N₂O₄, there are 20 x 4 = 80 oxygen atoms
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how many signals would you expect in the 1h nmr spectrum of the compound shown?
The two methyl groups are equal since they share the same binding and are symmetric to another. The 1H NMR spectrum contains a total of three chemical reaction signals.
What is the short definition of a chemical reaction?In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products.
Why are methyl groups useful?The methyl group has two effects: it prevents transcription factors from binding, which in turn recruits RNA polymerase II, but it also permits the binding of a group of proteins that recognise the methylated DNA with particularity. These proteins then recruit histone deacetylases, which modify the histones connected.
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6.02 Phase changes
In order to go from solid to liquid heat must be added to the matter. This process is called melting. More energy must be added to transition from liquid to gas. This process is called boiling.
In order to go from a solid to a liquid, heat must be added to the matter. This process is called melting.
What is melting ?Melting is the process of changing from a solid state to a liquid state. This process occurs when the temperature of the material increases and it can no longer remain in its solid form. During this process, the molecular structure of the material is disrupted, allowing the molecules to move around and form a liquid. Melting can occur with a wide range of materials, including metals, plastics, and even some organic compounds. The temperature at which a particular material melts depends on its composition and structure, as well as the surrounding environment. In many cases, melting can be a beneficial process, allowing materials to be reshaped or combined into new forms.
Melting occurs when the kinetic energy of the particles in the solid increase to the point where they can move past each other, forming a liquid. To transition from a liquid to a gas, more energy must be added. This process is called boiling. Boiling occurs when the kinetic energy of the liquid particles increase to the point where they can escape the surface of the liquid, forming a gas.
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How much 350 mM Tris is needed to make 2 liters of a 0.1 M solution? How much water?
Tris=121g/mol
The 350 mM Tris is needed to make the 2 liters of the 0.1 M solution, The volume of the water is 0.571 L.
The initial molarity , M1 = 350 mM = 0.350 M
The final molarity , M2 = 0.1 M
The final volume , V2 = 2 L
The initial volume , V1 = ?
The expression is :
M1 V1 = M2 V2
Where ,
M1 = 0.350 M
M2 = 0.1 M
V1 = ?
V2 = 2 L
V1 = M2 V2 / M1
V1 = ( 0.1 × 2 ) / 0.350
V1 = 0.571 L
Thus, the volume of the Tris is 0.571 L.
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how does hydrogen bonding differ between specific nucleobase pairs?
The hydrogen bonding is differ between the specific nucleobase pairs as cytosine bonds to guanine with the 3 hydrogen bonds and the adenine binds with thymine with the 2 hydrogen bonds .
There ae the four nucleobase, in which the cytosine bonds to guanine with the 3 hydrogen bonds and the adenine binds with thymine with the 2 hydrogen bonds . This is as follows :
G-C base pairs = 3 hydrogen bonds,
A-T base pairs = 2 hydrogen bonds
Therefore, the double-stranded DNA with the higher number of the G-C nucleobase pairs will have more strongly bonded together and are more stable, and they have the higher melting temperature.
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Which of the following statements correctly describe different types of mixtures? Select all that apply.
- A heterogeneous mixture contains two or more different phases.
-The composition of any mixture is variable.
-Differences in particle size account for the main differences between solutions and colloids.
First and second statements are correct regarding different types of mixtures. A heterogeneous mixture contains two or more different phases, and the composition of any mixture is variable.
The first statement, "A heterogeneous mixture contains two or more different phases" is true because heterogeneous mixtures consist of two or more different phases, such as solids, liquids, and gases. Each phase has its own distinct properties, such as viscosity, density, and boiling point, which are determined by the components that make up each phase.
The second statement, "The composition of any mixture is variable" is also true. Mixtures can consist of any combination of the various components that make up the mixture, and the proportions of each component can vary. The different components of a mixture can be combined in a variety of ways, and the proportions of each component can be adjusted to obtain the desired properties of the mixture.
Differences in particle size do not account for the main differences between solutions and colloids, as solutions contain particles that are small enough to be completely dissolved, while colloids contain particles that are larger and remain suspended in the mixture. The main difference is that solutions are homogeneous mixtures, while colloids are heterogeneous mixtures. Solutions are composed of molecules that are small enough to be evenly distributed throughout the mixture, while colloids contain particles large enough to remain suspended in the mixture, creating a heterogeneous mixture.
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According to the VSEPR theory, which one of the following species is linear?
A) H2S B) HCN C) BF3 D) H2CO E) SO2
(B) HCN. According to the VSEPR theory, HCN species is linear. It features a triple bond between the C and N atoms and a bond angle of 180 degrees. It is a linear molecule.
What is VSEPR theory and how does it work?According to the theory, electron pairs organize themselves to reduce their magnetic attraction to one another. Lone pair-lone pair > lone pair-bond pair > bond pair-bond pair are the electron pair repulsions in decreasing order. Examples of molecules that follow the VSEPR model include 1.
What are the VSEPR theory's three underlying presumptions?Because they are negatively charged, electron pairs will go as far apart as they can. Space is taken up by lone pairs rather than bonded electron pairs. Compared to single bonds, double bonds take up more room.
What are the VSEPR's restrictions?Because it ignores the relative sizes of the substituents and stereochemically inactive lone pairs, the VSEPR model also fails to predict the structure of some compounds. The d-block elements tend to contain electron pairs that are stereochemically inactive and have relatively high atomic masses.
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Students were given three graduated cylinders containing three different liquids: oil, water and syrup. They were asked to predict what would happen when the three liquids were poured into one container. The majority of students said that the liquids would form a mixture. The liquids were poured into a jar and the results can be seen here. Explain what happened to the three liquids.
A The liquids formed three distinct layers because of different densities.The liquids formed three distinct layers because of different densities.
B The liquids formed three distinct layers because of varying masses.The liquids formed three distinct layers because of varying masses.
C The liquids formed three distinct layers because of different volumes.The liquids formed three distinct layers because of different volumes.
D Oil is lighter than water; water is lighter than syrup.Oil is lighter than water; water is lighter than syrup.
The students conducted a second experiment. They measured 100 ml of water, density 1 g/cm3
and 100 ml of mineral oil , density 0.8 g/cm3
. They poured the water into Cup A and the oil in to Cup B. Next they added an ice cube to each cube. All BUT ONE statement is a valid conclusion.
Responses
A If oil and water are combined in one cup, the oil will float on top of the water.If oil and water are combined in one cup, the oil will float on top of the water.
B Ice is more dense than mineral oil.Ice is more dense than mineral oil.
C Ice and liquid water have the same density but ice is buoyant in water.Ice and liquid water have the same density but ice is buoyant in water.
D Ice has a density less than 1 g/cm3
.
The liquids formed three distinct layers because of different densities.
Ice has a density less than 1 g/cm3
What is the nature of the liquids?We have to note that if the density of the liquids are not the same then the liquids would have to separate based on the density of each of the liquids. We have to also note that none of the liquids can be found to be miscible at all.
We know that the object that is less dense is the object that is going to float so the fact that ice was floating on the water means that the ice is less dense than water.
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What is the boiling point of CH4?
The boiling point of CH4 is −162 °C
What is boiling point?
The temperature at which a liquid's vapor pressure equals the pressure of the gas above it is known as the boiling point of the liquid. The temperature at which a liquid's vapor pressure equals one atmosphere is known as the typical boiling point of that substance.
At the same concentration, ionic solutes raise the boiling point more than nonionic solutes do. One of the collective properties is boiling point elevation. Only the quantity of particles in the solution is relevant. Because the intermolecular forces of attraction between methane molecules are so minimal, it has a low boiling point.
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gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . what is the theoretical yield of carbon dioxide formed from the reaction of of ethane and of oxygen gas? round your answer to significant figures.
Therefore, 96.768 grams of carbon dioxide is the theoretical yield.
Stoichiometry is largely used in chemistry to balance chemical reactions. The relationship between the physical alterations of two or more chemical elements during a chemical reaction is also determined using this method.
Given data
Mass of the ethane = 20.2 g
Mass of oxygen gas is m。 = 125 g
The molar mass of the ethane is Me = 30.07 g/mol
The molar mass of the oxygen is M = 16 g/mol
The number of moles of ethane is calculated as,
nm = me/Me
= (20.2g)/(30.07g / m * ol) = 0.672mol
The necessary chemical process is illustrated below.
2C2H6 + 702 → 4CO2 + 6H2O
Two moles of ethane and seven moles of oxygen are reacting in the reaction shown above to produce four moles of oxygen and six moles of water. Because there are fewer moles of ethane than there are of oxygen in this chemical reaction, it acts as the limiting reagent. Therefore, the amount of ethane is exactly equal to the amount of carbon dioxide in moles.
Consequently, the theoretical carbon dioxide yield is determined as follows:
Yield equals = ne(4 Mc + 6 Mo).
= (96.768 g) (0.672 mol) (4 12 g/mol + 6 16 g)
=96.768 grams
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Gaseous ethane (CH3CH3) reacts with gaseous. oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O). What is the theoretical yield of cartoon dioxide formed from the reaction of 20.2 g of ethane and 125 g of oxygen gas? Be sure your answer has the correct number of significant digits in it.
where does desalinated water originally come from?
explain why the dipole moment of NH3 (1.46D) is more than that of NF3 (0.24D)?
Ammonia has a dipole moment (1.47D) that is greater than NF 3's dipole moment (0.24D). For both molecules, the molecular geometry is pyramidal. Each molecule has one lone pair on the N atom. F is more electronegative than H, and the link between them is more polar.
Thus, it is anticipated that NF 3 will have a substantially greater dipole moment than NH 3. However, the contrary is true because, in the case of ammonia, the bond pair and lone pair dipole moments have the same direction, whereas, in the case of NF 3, they have the opposite direction.
Individual dipole moment vectors add in the ammonia molecule but cancel in the NF 3 molecule.
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when does the kinetic molecular theoyr break
One of the postulates of the kinetic molecular theory that fails at low temperatures is the assertion that there are no attractive or repulsive forces between the gas particles.
For beginners, what is kinetic molecular theory?According to the kinetic molecular theory, collisions between gas particles occur in perfect elastic motion and are always in motion. Boyle's and Charles's laws can both be explained by the kinetic molecular theory. Only absolute temperature directly affects a group of gas particle's average kinetic energy.
What are KMT's two fallacious presumptions?A gas's molecules do not interact with one another in an attractive or repelling manner. The volume of a gas's molecules is quite little in comparison to the void that exists between them.
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calculate the molarity of 2.00 l of solution that contains 200.0 g of naoh
The molarity of the solution that contains 200.0 g of naoh is 5.00 mol / 2.00 L = 2.50 M.
The molarity of a solution can be calculated by dividing the number of moles of solute by the volume of solution in liters. To find the number of moles of NaOH, we first need to find its molar mass:
NaOH = Na (23 g/mol) + O (16 g/mol) + H (1 g/mol) = 40 g/mol
So, 200.0 g of NaOH is equal to 200.0 g / 40 g/mol = 5.00 mol of NaOH
And the molarity of the solution is 5.00 mol / 2.00 L = 2.50 M.
The molarity of a solution is the number of moles of solute present in 1 liter of the solution. To calculate the molarity of a solution, divide the number of grams of solute by the molar mass of the solute and then divide that by the volume of the solution in liters. In this case, divide 200.0 g of NaOH by its molar mass, divide the result by 2.00 L to find the molarity.
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What is the name of this element? (spell out the element name, no symbol) Please Help!!!
Answer:
Oxygen
Explanation:
This element has 8 protons (it doesn't matter if x or y are the protons, they both still have 8 of them), which means that the element is 8, otherwise known as Oxygen.
the molecules of which phase have the greatest intermolecular forces, compared to their kinetic energies?
The molecules of a solid phase have the greatest intermolecular forces, compared to their kinetic energies.
This is because solids have a much higher density than gases or liquids, which means that the molecules are more closely packed together and experience stronger intermolecular forces. At the same time, the kinetic energy of molecules in the solid phase is much lower than that of molecules in the gas or liquid phase, since the molecules are not able to move around as freely.
This results in greater intermolecular forces relative to the kinetic energy of the molecules, making the solid phase the phase with the greatest intermolecular forces compared to their kinetic energies.
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When two atoms form a polar covalent bond the two atoms must have?
When atoms with various electronegativities share electrons inside a covalent link, the result is a polar covalent bond.
How an atom is formed?Atoms are made up of a nucleus in the middle that is surrounded by protons, neutrons, and electrons. Uranium is split into smaller atoms during the fission process, creating new atoms. The creation of atoms in enormous numbers can be seen in the Big Bang as well as Supernova phenomena.
Which element is a atom?Every component of an element is an atom. A specific element only has one kind of atom per atom. Protons, neutrons, and electrons, which are subatomic particles, make up the remainder of an atom. Chemical reactions allow elements to unite to create molecules.
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Determine the protons, neutrons, and the most likely type of nuclear reaction to occur.
These nuclear processes also produce subatomic particles like protons or neutrons.
How can the kind of nuclear reaction be identified?Nuclear reactions are changes to nuclei that cause adjustments to their atomic weights, masses, or energy levels. We utilize an equation that identifies the nuclides, their mass numbers, atomic numbers, and other particles participating in the process to describe nuclear reactions.These nuclear processes also produce subatomic particles like protons or neutrons.Gamma emission, alpha and beta decay, and other nuclear decay events are the most frequent, but knowledge of the others is crucial.Nuclear reactions are changes to nuclei that cause adjustments to their atomic weights, masses, or energy levels.To learn more about nuclear processes refer to:
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Which one of the properties listed below represents a physical property?
Hints
A. The density of iron is 7.9 g/cm^3.
B. Gasoline burns in air to form carbon dioxide and water.
C. An acid neutralizes a base, forming a salt and water.
D. Iron, Fe, reacts with oxygen to form rust.
One of the attributes listed below that reflects a physical property is the density of iron, which is 7.9 g/cm3.
The correct answer is A
Simply put, what is density?The term "density" refers to the ratio between the volume (the amount of space taken up by an object or substance) and the amount of matter contained therein (its mass). The quantity of mass per volume unit is another method to define density.
What is density, for instance?The amount of matter a volume can hold is measured by its density. At the same size, a dense item weighs greater than a lesser dense one. On it, a substance with a density less than seawater will float whereas one with a higher density will sink. The concentration equation is D = M / V, or density equal mass per unit volume.
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in a solution ______ (select all that apply) -the solvent is usually the substance present in the greatest quantity
-the solvent generally reacts with the solutes
-one or more solutes may be present
-the solvent is always water
-ions are always present
A) In a solution, the solvent is often the component that is present in the highest concentration.
What substance is present in the largest amount?The remover The substance(s) present in the greatest amount in any solution, whether gaseous, liquid, or solid, are the solvent(s), and the substance(s) present in the lower amount(s) are the solute(s) (s).
What part does a solvent play?Term in this set (6) A liquid that dissolves things is called a solvent. Solvable substances are those that can dissolve in a certain solvent. A substance is said to be insoluble if it cannot dissolve in a specific solvent.
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Which compounds do not have the same empirical formula?
a) C2H2, C6H6
b) CO, CO2
c) C2H4, C3H6
d) C2H4O2, C6H12O6
e) C2H5COOCH3, CH3CHO
CO, CO₂ compounds do not have the same empirical formula among the followings.
Option B is correct.
What exactly are empirical formulas?The chemical formula of a compound known as an empirical formula only reveals the ratios (proportions) of the elements that are contained within the compound and not the actual number or arrangement of atoms. This would be the element in the compound with the lowest whole number ratio.
The empirical formula, which is defined as the ratio of subscripts to the smallest possible whole number of the elements in the formula, is the simplest formula for a compound.
Why does empirical formula exist?Most of the time, the empirical formula is used to just show what elements are in a molecule. When someone wants to quickly see what they're dealing with, this is helpful. When determining the number of elemental atoms in a compound, the molecular formula is most useful.
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