A dehumidifier tank is emptied once a day. if the capacity of tank is 2 gallons , Number of Molecules of water the dehumidifier collects from the air per millisecond is 2.92 × 10³² molecules / milliseconds
The capacity of dehumidifier tank = 2 gallons
1 gallon = 4 quarts , 1 quart = 0.94633
1 gallon = 3.785 L
2 gallon = 3.785 × 2 = 7.57 L = 7570 ml
time taken to fill the tank = 1 day
Density of water = 1 g/ml
Mass of water = D × V
= 7570 × 1 = 7570 g
molar mass of water = 18 g/mol
no. of moles = mass / molar mass
= 7570 / 18 = 420.5 moles
now, 1 mole of water contains = 6.022 × 10²³ water molecules
420.5 moles of water = 6.022 × 10²³ × 420.5
= 2.53 × 10²⁶ molecules
2.53 × 10²⁶ molecules collected in 1 day
1 day = 86400 sec
1 sec = 1000 milliseconds
86400 sec = 86400 × 1000 milliseconds
= 8.64 × 10⁷ milliseconds
so, the molecules of water collected per milliseconds
= 2.53 × 10²⁶ molecules / 8.64 × 10⁷ milliseconds
= 2.92 × 10³² molecules / milliseconds
Thus, A dehumidifier tank is emptied once a day. if the capacity of tank is 2 gallons, Number of Molecules of water the dehumidifier collects from the air per millisecond is 2.92 × 10³² molecules / milliseconds
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In which group do all the elements have the same number of valence electrons?
a. p, s, cl
b. ag, cd, ar
c. na, ca, ba
d. p, as, se
e. none of these
The correct option is (e) none of these ,Valency is the ability of an element to combine.
What is Valency?Valency is the ability of an element to combine. Elements in the same group of the periodic table have the same valency. An element's valency is determined by how many electrons make up its outer shell.
A property of an element called "valency" defines how effectively it can meld with other elements. It is a way to count how many electrons are in an atom's outermost shell.
An atom's stability is determined by its valence electrons. Additionally, valence electrons are in charge of an atom's stability. The Octet Rule states that atoms often gain or lose electrons to reach the octet state, which is defined as having eight electrons in their valence shell. They stabilise at this stage.
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A lead ball is added to a graduated cylinder containing 30.8 ml of water, causing the level of the water to increase to 89.9 ml. what is the volume in milliliters of the lead ball, lead?
A lead ball added to a graduated cylinder containing 30.8 ml of water, causing the level of the water to increase to 89.9 ml, has a volume of 59.1 ml.
Volume is defined as the amount of space that matter occupies. There are three different ways to find the volume:
1) Volume by Space - by measuring its physical dimensions
2) Volume by Density and Mass - by dividing its weight by its density
3) Volume by Displacement - by measuring the volume displaced when immersed in a liquid or gas
To solve for the volume of the lead ball, we can use the displacement method by subtracting the initial volume from the final volume.
If the level of the water increased from 30.8 ml to 89.9 ml upon adding the lead ball, the displaced volume is:
volume = final volume - initial volume
volume = 89.9 - 30.8
volume = 59.1 ml
Hence, the volume of the lead ball, using displacement method, is 59.1 ml.
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Answer: 59.1 mL
Explanation: In order to find the volume of the lead ball, you will simply take the difference between the volume of the water before and after the ball was submerged.
In normal decimal form and scientific notation
Which electron configuration is correct for a ca 2 ion?
a. 1s22s22p63s23p1
b. 1s22s22p63s23p64s24p6
c. 1s22s22p63s23p64s2
d. 1s22s22p63s2
e. 1s22s22p63s23p6
The correct answer for electron configuration of a Ca2+ ion is e. 1s22s22p63s23p6 which is isoelectronic with the noble gas argon.
Isoelectronicity is a phenomenon determined whilst or greater molecules have equal structure (positions and connectivities amongst atoms) and equal digital configurations, however, range through what particular factors are at positive places withinside the structure.
This definition is on occasion termed valence isoelectronic. Definitions can on occasion be now no longer as strict, on occasion requiring identification of the full electron matter and with it the whole digital configuration.[2] More usually, definitions are broader and can enlarge to permit one-of-a-kind numbers of atoms withinside the species being compared.[3]
The significance of the idea lies in figuring out considerably associated species, as pairs or series. Isoelectronic species may be anticipated to reveal beneficial consistency and predictability of their houses, so figuring out a compound as isoelectronic with one already characterized gives clues to feasible houses and reactions (Differences in houses which includes electronegativity of the atoms in isoelectronic species can have an effect on reactivity.)
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1. We have new knowledge of how charge can be transferred from one object to another
(water + balloon; balloon + wall; tape). How might that information help us explain the
differences we noticed when we tested the conductivity of deionized water, salt water, and
sugar water?
Charge can be transferred from one object to another in three way conduction, polarization, and friction
Whenever electrons are transferred between objects, neutral matter becomes charged and three ways this can occur are referred to as conduction, polarization, and friction conduction means when there is direct contact between materials that differ in their ability to give up or accept electrons when two different materials are rubbed together, there is a transfer of electrons from one material to the other material and this causes one object to become positively charged (the electron loser) and the other object to become negatively charged (the electron gainer)
Here given object is water + balloon; balloon + wall; tape then you rub a balloon against your clothes and it sticks to the wall, you are adding a surplus of electrons (negative charges) to the surface of the balloon the wall is now more positively charged than the balloon and we tested the conductivity of deionized water positively charged
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which component of the following reaction is the enzyme? sucrose sucrase water → sucrase glucose fructose
Sucrase is the enzyme in the given reaction.
Enzymes help proceed with chemical reactions faster in the body. They play a key role in digesting food, respiration, and other chemical processes happening in the body.
Sucrase is an enzyme that helps with digestion by the hydrolysis of sucrose into glucose and fructose. They are localized in the brush holder for the absorption of food. The body won't absorb sucrose in the absence of sucrase.
Sucrase is also known as invertase and it also occurs in plants for the hydrolysis of sucrose.
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What is the approximate concentration of reaction product in a solution that has an absorbance of 0.7 at ph 6.0?
The approximate concentration of reaction product in a solution that has an absorbance of 0.7 at ph 6.0 is based on the equation A = εbc given in the passage, the concentration c is the absorbance A divided by the absorptivity ε in a 1 cm path length cell. 0.7 divided by approximately 1400 gives 500 μM.
A = εbc
0.7 = 1400 x c
7/14000 = 1/2000 = 0.0005 = 5x10^-4 = 500 μM
1 μM = 1 x10 ^-6
The concentration of a substance is the amount of solute present in a given volume of solution. Concentration is usually expressed in molarity, defined as the number of solutes in 1 L of solution. Solution concentration is a measure of the amount of solute dissolved in a given amount of solvent or solution.
Concentrated solutions are solutions that contain relatively large amounts of solutes. Dilute solutions are solutions that contain relatively small amounts of solutes. The definition of concentration means the amount of an ingredient or part relative to other ingredients or parts. An example of concentration is the amount of salt to water in a brine solution.
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Why is it necessary to keep the temperature constant, but not the concentration of the reactants when determining the rate law expression through the initial rate method?
It is necessary to keep the temperature constant, but not the concentration of the reactants when determining the rate law expression.
What is the rate law expression?
A chemical reaction's rate and the concentrations of the reactants involved are correlated by an expression known as the rate law, commonly referred to as the rate equation or rate law equation.
A frequent way for determining rate laws is the concept of beginning rates. The method includes determining the starting rate of a reaction, as the name initial rate method would imply. To observe how the reaction rate varies, the measurement is repeated for several sets of beginning concentration conditions.
When establishing the rate law expression using the initial rate technique, it is required to maintain a constant temperature but not the reactant concentration because the rate constant fluctuates with temperature. k=Ae^-Ea/RT.
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In the mass spectrum of pentane, the presence of a peak with an m/z = 57 most likely is due to the loss of what radical from the molecule?
In the mass spectrum of pentane, the presence of a peak with an m/z = 57 most likely is due to the loss of methyl radical.
The electromagnetic spectrum is the gamut of electromagnetic radiation's frequencies, together with the corresponding wavelengths and photon energies. Electromagnetic waves having frequencies between 1 hertz and 1025 hertz are included in the electromagnetic spectrum. This translates to wavelengths that range from several hundreds of kilometers to only a small portion of an atomic nucleus in size.
Each of the bands that make up this frequency range has a unique name for the electromagnetic spectrum that it contains. The electromagnetic spectrum is made up of radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, starting at the low frequency (long wavelength) end and ending at the high frequency (short wavelength) end.
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A lone pair must reside in which orbital type(s) to participate in resonance/conjugation/delocalization?
If a lone pair is participating in resonance, this capability the atom is both Sp2 or Sp hybridized. Looking at the Sp2 case, that ability there are 3 Sp2 orbitals and one P orbital. Assuming there is no formal cost on the atom, the three hybrid orbitals are used for bonding and the lone P-orbital holds the lone pair. Sp3 orbitals are no longer involved with resonance so the lone pair worried in resonance should never be in an Sp3 orbital.
A mathematically described area round a nucleus in an atom or molecule that may also include zero, one, or two electrons Electrons organize themselves in cloudlike areas round the nucleus referred to as orbitals.
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An atom has 13 protons, 12 neutrons and 13 electrons in an atom. it loses 2 electrons to form an ion. find the number of protons, and electrons in the ion. also, find the charge of the ion.
(Tell as soon as possible) *Thank you *
Answer:
If there are 13 protons (positive charges), how many electrons are there in a neutral atom? Expert Answer 1)) given total number of protons =13 and electron =12 . For atom to be neutral total number of protons should be equal to total number of electrons.
Explanation:
5 examples of ionic bonding
Answer:
NaCl: sodium chloride.
NaBr: sodium bromide.
NaF: sodium fluoride.
NaI: sodium iodide.
KF: potassium fluoride.
Explanation:
Hope this helps!
The formulas for ethane, ethene, and ethyne are c2h6 , c2h4 , and c2h2 , respectively. Rank these compounds by the length of the carbonâ€"carbon bond.
The descending order of carbon-carbon bond length in C₂H₆, C₂H₄, and C₂H₂ is:-
C₂H₆, C₂H₄, C₂H₂
Hydrocarbons are compounds that consist of only hydrogen and carbon.
On the basis of the presence or absence of double bonds/triple bonds, they are of three types- alkanes, alkenes, and alkynes.
Alkanes do not contain any double bonds.Alkenes contain one or more double bond(s) between the carbon atoms.Alkenes contain one or more triple bond(s) between carbon atoms.The comparison between alkanes, alkenes, and alkynes is given in the adjoining image.
We can see that the bond length in alkanes like C₂H₆ is 1.53 A which is greater than alkenes(C₂H₄) , 1.33 A which is still greater than alkynes(C₂H₂) with a value of 1.18 A.
Thus, The descending order of carbon-carbon bond length in C₂H₆, C₂H₄, and C₂H₂ is:
C₂H₆, C₂H₄, C₂H₂
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What molecules are found in all or almost all organic compounds?
a. Carbon and oxygen
b. Hydrogen and oxygen
C.
Carbon and nitrogen
d. Carbon and hydrogen
Please select the best answer from the choices provided
Ο Α
OB
O C
OD
What is the hydrogen deficiency index (hdi) for a compound with the molecular formula c9h10o?
Hydrogen deficiency index (HDI) for a compound with the molecular formula C9H10O.
What is Hydrogen Deficiency Index(HDI)?
A "deficit" of H atoms would exist if any of the bonds were replaced with double or triple bonds or if rings were involved. We may determine whether and how many multiple bonds and rings are present from the molecular formula by computing the index of hydrogen deficit (IHD). IHD is also known as Unsaturation Degree.
The compound C9H10O has five pi bonds, which is a count of deficiency.
Thus, HDI for C9H10O is five.
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Calculate the energy (a) in ev and (b) in joules of the third energy level (n= 3) ofa hydrogen atom.
The energy (a) in EV and (b) in joules of the third energy level (n= 3) of the hydrogen atom.
-1.51 eV
-2.42 x 10^-19 J
In physics, energy is a quantitative property that is transferred to a body or physical system and can be perceived in the performance of work or in the form of heat and light. Energy is Conserved - The law of conservation of energy states that energy can be transformed into form, but cannot be created or destroyed.
The energy price cap, introduced in 2019 by market regulator Ofgem, sets the maximum amount (known as the “unit price”) that utilities can charge per kWh of gas and electricity. There is no right or wrong answer to choosing between a fixed power plan and a variable power plan. Which energy rate is best for your home depends on your assessment of future energy prices and your willingness to take risks. Compare energy suppliers to find the perfect match.
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For the following electronic configuration of neutral atoms, [ne]3s23p5 , what is the element and the number of unpaired electrons in its ground state?
The number of unpaired electrons is 7.
What is unpaired electrons?When an electron resides in the orbital of an atom in chemistry, it is said to be unpaired if it is not a part of an electron pair. Each of an atom's atomic orbitals is large enough to accommodate two electrons with opposite spins.
This electron configuration is known as the noble gas configuration because the core electrons in it are represented by the noble gases that have the appropriate number of electrons.
According to the electron configuration, the atom has 7 more electrons than neon. As a result, the atom is chlorine.
Unpaired electrons are the ones that appear in an orbital alone, whereas paired electrons are the ones that appear in an orbital as pairs in an atom.
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The number of unpaired electrons is 7. The element is Chlorine.
What is unpaired electrons?An unpaired electron is an electron that doesn't form part of an electron pair when it occupies an atom's orbital in chemistry.
Two electrons with opposing spins can fit into each of an atom's atomic orbitals.Because the noble gases that match to the right amount of electrons represent the core electrons in this electron configuration, it is known as the noble gas configuration.
The atom possesses 7 more electrons than neon, according to the electron configuration. The atom is chlorine as a result.
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You decide you want to find out how temperature affects the rate of dissolving sugar. you put the same amount of sugar into two identical beakers each with the same amount of water but at different temperatures. what is the variable? what is an independent variable? what is the dependent variable? explain your answers.
The experiment is performed to determine the solution and the observations. Variables are the data that are present in the experiment. Temperature is the independent and solubility is the dependent variable.
What are independent and dependent variables?Independent variables are defined by the variables that vary in the experiment and are the temperature in this case as the dissolution capability of the sugar is studied in the experiment.
The solubility of the sugar is a dependent variable as it varies based on the temperature of the beaker which affects the solubility factor. It gets altered by the temperature.
Therefore, the temperature is the independent variable.
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Which is true about UVA and UVB rays?
A. Both rays can be blocked 100% by sunscreen
B. UVA protects the surface, UVB protects beneath the surface
C UVB rays cause burning, UVA rays cause premature aging
D. UVA rays cause burning, UVB rays cause premature aging
Answer: C. UVA rays cause premature aging and UVB rays cause burning
Explanation: Ultraviolet radiation causes DNA changes in the skin, leading to premature aging and skin cancer. There are three kinds of UV light: UVA light. This form of solar radiation damages skin at all levels—from the surface layer (epidermis) down deep into the dermis.
Which name is inconsistent with iupac nomenclature rules? 2-ethyl-4-methylhexane 2,3-dimethyl-4-propyldecane 4,5-dimethyloctane 3,3,5-triethyl-3-methylheptane 3,4-dimethyl-4-propyloctane
The correct answer is 4-ethyl-2-propylhexane.
Nomenclature is a device for giving names to matters within a specific career or field. For instance, you may additionally have heard of binomial nomenclature in biology class. It refers to the way of referring to living matters via two names, like calling people Homo sapiens.
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What type of ring strain is predominantly responsible for causing cyclooctane to be higher in energy than linear octane?
a. torsional strain
b. transannular strain
c. angle strain
d. isomer strain
Transannular strain predominantly responsible for causing cyclooctane to be higher in energy than linear octane.
Linear octane is a chain like structure in which 8 carbon atom are present and cyclooctane is a cycle like structure in which 8 carbon atom are present. cycloalkanes tend to give off a very high and non-favorable energy, and the spatial orientation of the atoms is called the ring strain in that linear octane there is no ring strain because this is like a chain and in cyclooctane transannular strain is seen because it is cycle like structure the unfavorable interactions of ring substituents on non-adjacent carbons called transannular strain in cyclooctane transannular strain is more that's why energy is higher than linear octane.
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Which could represent the reaction mixture after the complete combustion of acetaldehyde, ch3cho?
The term that represents the reaction mixture after the complete combustion of acetaldehyde, ch3cho is H-O-H, O-C-O. The correct option is b.
What is complete combustion?Complete combustion is the process of consuming all oxygen in the reaction. In the process of combustion, oxygen is needed for the process. In incomplete combustion, oxygen is not present in the reaction.
In incomplete combustion, less energy is produced because of less oxygen in the reaction.
The inorganic substance that is showing the complete combustion process is H-O-H, O-C-O.
Thus, the correct option is b. H-O-H, O-C-O.
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The question is incomplete. Your most probably complete question is given below:
a. C-O; O-H, O-C
b. H-O-H, O-C-O
c. H-C-C-C-H
d. C-O, O-C, H-H
e. O-C-H, H-H-H
What does it mean for matter to change physically?
Answer:
Its when it transforms into a diffrent product like water to ice.
Explanation:
find the number of h atoms present in NH2 CONH2
Answer:
Prolly 4
NH2 CONH2
Explanation:
The most common ions for silver, zinc, and scandium are ag , zn2 , and sc3 . which of these ions have the same number of electrons as a noble-gas element?
Sc3+ ion has the same number of electrons as a noble-gas element.
For example, scandium (Sc) is an element with atomic number 21.
Electron configuration of scandium atom: ₂₁Sc 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹.
Electron configuration of scandium ion 3+: 1s² 2s² 2p⁶ 3s² 3p⁶
Scandium ion Sc³⁺ has the same number of electrons as noble gas argon (Ar).
Silver (Ag) is an element with atomic number 47.
Electron configuration of silver metal: [Kr] 4d¹⁰ 5s¹
Electron configuration of silver ion 1+: [Kr] 4d¹⁰
It does not have same configuration as noble gas.
Zinc a chemical element (the group 12 of the periodic table) with symbol Zn and atomic number 30, which means it has 30 protons and 30 electrons, because atom has neutral charge.
Electronic configuration of zinc atom: ₃₀Zn 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s².
Electronic configuration of zinc ion Zn²⁺: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰
It does not have same configuration as noble gas.
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Which are nutrition components that must appear on the nutrition facts food label?
Total calories (kcal), calories from fat, saturated fat, trans fat, cholesterol, sodium, total carbs, fiber, sugars, protein, vitamin A, vitamin C, calcium & iron are nutrition components that must appear on the nutrition facts food label.
Nutrition is an important factor in health and development. Better nutrition is associated with improved infant, child, and maternal health, stronger immune systems, safer pregnancies and births, reduced risk of non-communicable diseases (such as diabetes and cardiovascular disease), and longer lifespans. doing. Healthy children learn better. Well-nourished people are more productive and can create opportunities to gradually break the cycle of poverty and hunger.
Malnutrition in all its forms poses a significant threat to human health. I'm facing Malnutrition has several forms and including undernutrition (wasting or underdevelopment), inadequate vitamins or minerals, overweight, obesity, and consequent diet-related noncommunicable diseases.
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Anything detected with the five senses is considered an
Answer:
sight, taste, touch, hearing and smell
Explanation:
Anything detected with the five senses is considered a sensory perception or sensory experience
Our five senses are sight (vision), hearing (audition), taste (gustation), touch (tactile perception), and smell (olfaction). These senses allow us to perceive and interpret information from the external environment.
When stated as "detected with the five senses," which means gather information about the world around us through these sensory experiences.
For example:
1. Sight (Vision): We perceive visual information through our eyes, allowing us to see colors, shapes, and movements.
2. Hearing (Audition): We perceive auditory information through our ears, allowing us to hear sounds and distinguish between different tones and pitches.
3. Taste (Gustation): We perceive taste sensations through our taste buds on the tongue, allowing us to distinguish between sweet, sour, salty, bitter, and umami flavors.
4. Touch (Tactile Perception): We perceive tactile sensations through our skin, allowing us to feel textures, pressure, temperature, and pain.
5. Smell (Olfaction): We perceive smells through our olfactory system, located in our nose, allowing us to detect and identify various scents and odors.
All the sensory experiences , whether through sight, hearing, taste, touch, or smell, contribute to our understanding of the world and our surroundings.
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Sodium benzoate is a widely used food preservative. what type of cells can utilize sodium benzoate as a carbon and energy source?
Sodium benzoate is a widely used food preservative. The type of cell that can utilize sodium benzoate as a carbon and energy source is pseudomonas cell.
What are pseudomonas cells?Psuedomonas cells are simple cell. They are gram-negative or gram-positive bacteria. These cells infect humans, animals, and plants.
They grew on fruits and vegetables. They also infect or contaminate food. So they are very harmful to all living organisms.
Thus, a common food preservative is sodium benzoate. Pseudomonas cells are the only kind of cell that can use sodium benzoate as both a carbon and an energy source.
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Transmembrane proteins move ions or molecules across a membrane against their concentration gradient. True or false?.
The above statement is True.
Transmembrane proteins are the integral proteins, which helps ions and molecules to cross the membrane against the concentration gradient.
The transmembrane protein consist of both hydrophobic and hydrophilic amino acid side chains in his structure.
A membrane protein Is a protein molecule that is joined to or connected to an organelle’s or cell’s membrane. Depending on how the protein is connected to the membrane, membrane proteins can be divided into two categories, integral and peripheral membrane proteins.
The plasma membrane contains integral membrane proteins that are permanently ensconced there. They perform a variety of crucial functions like moving molecules through ion channels or transferring them across membranes.
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What is the nucleotide sequence of an mrna strand that has been transcribed from the dna sequence ggtagc?
CCAUCG is the nucleotide sequence of an mrna strand that has been transcribed from the DNA sequence ggtagc.
What is a nucleotide sequence?Transfer RNAs interact with the ribosome system to translate a nucleic acid sequence, known as a messenger RNA or mRNA, into the protein it encodes. Transfer RNAs partition the nucleic acid sequence into triplet codons, each of which specifies one amino acid, by binding to three nucleotides at once. The sequence does not contain punctuation signals to indicate which reading frame should be used, hence the nucleic acid can be read in three different phases or reading frames depending on the point at which division into codons begins. An addition or deletion in the nucleic acid sequence that changes the translation process from one reading frame to another is known as a frameshift mutation.To know more about the nucleotide sequence, refer:
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