What is the balanced equation for this reaction, which takes place in a basic solution?
Cr(OH)3(s) + ClO3–(aq) → CrO42 (aq) + Cl–(aq)
Cr(OH)3(s) + 2ClO3–(aq) + 6OH–(aq) → 3CrO42–(aq) + 2Cl–(aq) + 2H2O(l)
Cr(OH)3(s) + 2ClO3–(aq) + 4OH–(aq) → 2CrO42–(aq) + Cl–(aq) + 3H2O(l)
2Cr(OH)3(s) + ClO3–(aq) + 4OH–(aq) → 2CrO42–(aq) + Cl–(aq) + 5H2O(l)
2Cr(OH)3(s) + 2ClO3–(aq) + 6OH–(aq) → 2CrO42–(aq) + 2Cl–(aq) + 7H2O(l)
The balanced equation for the redox reaction, which takes place in a basic solution is:
2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O; option CWhat is the balanced equation for the redox reaction?A balanced equation for a redox reaction is one in which the electrons transferred are balanced and the atoms involved in the reaction are also balanced.
To balance redox reactions in a basic solution, OH⁻ ions and H₂O are placed on appropriate sides of the reaction.
Considering the given reaction:
Cr(OH)₃ + ClO₃⁻ (aq) → CrO₄²⁻ (aq) + Cl⁻ (aq):
The balanced equation will be:
2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O
The electrons transferred and the atoms involved are balanced.
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Which of these ground state ions has unpaired electrons
Mg 2+
P2-
Sc2+
S2-
V5+
The ground state ion that has unpaired electrons is Sc²⁺ ion; option C is correct.
What is ground state ion?The ground state ion is the state in which all its electrons are in the lowest energy orbitals possible. You can get positive ions by removing electrons until you reach a noble gas configuration.
Ground state ion configurations are the foundation for understanding molecular bonding, properties, and structures. From the electrons in an atom to the differing orbitals and hybridization, the ground state ion configuration throws light on many different atomic properties.
For example, the electronic configuration of Sc²⁺ is 1s²2s²2p⁶3s²3p⁶ 3d¹ 4s.
In conclusion, understanding electronic configuration leads to an understanding of the periodic table.
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3. Look at the positions of calcium, beryllium, and magnesium on the periodic table. Based on
their locations, predict how many valence electrons these elements have and predict what
the reactivity of these elements will generally be.
Answer:
Reactivity of these elements as follow
Calcium > Magnesium > Beryllium
What is valance electron?
A valence electron is an electron connected with an atom and capable of participating in the formation of a chemical bond; in a single covalent connection, both atoms contribute one valence electron to form a shared pair. The existence of valence electrons can affect the element's chemical characteristics and ability to bind with other elements: a valence electron can only be in the outermost electron shell of a main group element.
The valence shell, also known as the valence orbital, is the orbital found in the atom's outermost area. These valence shells contain electrons known as valence electrons, which are responsible for the chemical process. When one electron is withdrawn or added to this valence shell, the basic goal is to complete the element's octet.
The elements beryllium (Be), magnesium (Mg), calcium (Ca), have two electrons in their valence shells, giving them an oxidation state of +2
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Please help I have been stuck for a week Which of the following reactions is BALANCED and shows INCOMPLETE combustion
A. 2C5H12 + 1102--> 12CO+ 10H2O
B. 2C5H12 + 1102--> 10CO +12H20
C. C5H12 + 802--> 5CO2+6H20
D. C5H12 + 802--> 6CO2 5H20
The reaction given below shows a balanced incomplete combustion reaction:
B. 2 C₅H₁₂ + 11 O₂--> 10 CO + 12 H₂O
What is a combustion reaction?A combustion reaction is a reaction that involves substances reacting exothermically with oxygen to release large amounts of heat and light energy.
Hydrocarbons are compounds that contain only hydrogen and carbon.
Hydrogen combusts completely in oxygen to produce carbon(iv) oxide and water.
However, the incomplete combustion of hydrocarbons produces carbon (ii) oxide and water instead carbon(iv) oxide and water.
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1 gram of hydrogen ALWAYS reacts with 8 grams of oxygen. Precious mixes 2g of hydrogen with 20g of oxygen. (i) How much water is formed? [2
Answer:
18g
Explanation:
1g H + 8g O = 9g H2O since H is limiting factor
What is the mass in grams of 7.64 x 10^25
molecules of l₂?
Mass of 7.64 x 10^25 molecules of l₂ is 3.04 grams
Calculation of mass here we are doing from the number of molecules given. To do so we use the Avogadro's number. Avogadro's number is one of the most fundamental constants of chemistry. It helps us to compare the different atoms or molecules of given substances where the same number of atoms or molecules are being compared.
Along with that we will also be using the number mole as well here. number of moles is nothing but the given mass divided by the molecular mass of the compound.
To solve the above given question we use the below given formulas;
number of molecules = Number of moles × Avogadro number
Number of moles = Number of molecules
Avogadro number
⇒ 7.64×[tex]10^{25}[/tex] = 0.012 moles
6.023×[tex]10^{23}[/tex]
Mass = Number of moles × Molecular mass
⇒ 0.012 × 253.80 = 3.045 grams
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Hi! please help me identify the IUPAC name for the structures
The IUPAC names of the organic compounds would be as follows:
1. Methanol or 1-Methanol
2. Propan-2-ol or 2-Propanol
3. 2-MethylButane
4. 1-Hexanol
5. 1-Heptanol
Naming organic compoundsIn the naming of organic compounds, some fundamental rules come into practice. Some of these rules include:
The longest carbon chain, otherwise known as the parent chain, is considered.The substituents must be identifiedThe parent chain should be named such that the substituents are located on the lowest-numbered carbons. Repeated substituents are named accordingly.Different substituents are named alphabetically and substituents with lower alphabets are considered for the lowest-numbered carbons.Following these rules and more, the name of the organic compounds whose structures are shown in the image would be as follows:
Methanol or 1-MethanolPropan-2-ol or 2-Propanol2-MethylButane1-Hexanol1-HeptanolMore on IUPAC naming can be found here: https://brainly.com/question/16631447
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Which of the atoms listed below has the largest radius?
A) AI
B) P
C) Si
D) Na
E) Mg
According to the given statement Na of the atoms listed below has the largest radius.
What is an atom?An atom is made up of a core nucleus and one or even more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make it up the nucleus may be present. The fundamental building components of matter are atoms.
How are atoms made?Atoms are made up of a nucleus in the center that is surrounded by protons, neutrons, and electron. Uranium is divided into smaller atoms during the fission process, creating new atoms. The creation or atoms in enormous numbers can be seen in the Big Bang and Supernova phenomena.
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Will the following replacement reaction occur? Ca+Au2S3+
Yes, this replacement reaction 3Ca + Au₂S₃ → 3CaS + 2Au.
A replacement reaction occurs when elements switch places in compounds. This type of reaction involves ions.
Generally, more reactive elements replace less reactive elements. A single replacement reaction occurs when one element replaces another element in one compound.
A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound. The starting materials are always pure elements, such as a pure zinc metal or hydrogen gas, plus an aqueous compound.
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What mass (in grams) of Mg(NO3)2 is present in 183 mL of a 0.400 M solution of Mg(NO3)2 ?
0.0732 g
10.9 g
6.32 g
67.8 g
Answer:
B.) 10.9 g
Explanation:
To find the mass of Mg(NO₃)₂, you need to (1) convert the volume from mL to L, then (2) calculate the amount of moles (using the molarity equation), and then (3) convert moles to grams (using the molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units.
(Step 1)
1,000 mL = 1 L
183 mL 1 L
-------------- x ----------------- = 0.183 L
1,000 mL
(Step 2)
Molarity = moles / volume (L) <----- Molarity equation
0.400 M = moles / 0.183 L <----- Insert variables
0.0732 = moles <----- Multiply both sides by 0.183
(Step 3)
Atomic Mass (Mg): 24.305 g/mol
Atomic Mass (N): 14.007 g/mol
Atomic Mass (O): 15.999 g/mol
Molar Mass (Mg(NO₃)₂): 24.305 g/mol + 2(14.007 g/mol) + 6(15.999 g/mol)
Molar Mass (Mg(NO₃)₂): 148.313 g/mol
0.0732 moles Mg(NO₃)₂ 148.313 g
--------------------------------------- x --------------------- = 10.9 g Mg(NO₃)₂
1 mole
Consider two mixtures of gases available for use to fill a tire. One has the same composition as air (Gas 1: 20% O₂, 80% N₂) and
another has added carbon dioxide (Gas 2: 15% O₂, 80% N₂, 5% CO ₂ ). Compare the partial pressure of nitrogen gas in a 2L sample of
Gas 1 at sea level (1 atm) to the partial pressure of nitrogen gas in a 2L sample of Gas 2 at sea level. Explain your answer.
The partial pressure of nitrogen gas in 2L sample of gas 1 and gas 2 are equal.
The overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures exerted by each individual gas in the mixture, according to Dalton's law of partial pressures, a gas law.
P'=X° ×Pt ( P' = partial pressure , Xi = mole fraction , Pt= Total pressure )
Gas 1 ( ∵1 mole of gas = 22.4L)
Nitrogen moles = 80% × 2L / 22.4L
=8/5x22.4L
Oxygen moles = 20% ×2L /22.4L
2/5 × 22.4l
Mole fraction of nitrogen = (8/5 ×22.4L) ÷ (8/5 ×22.4L+ 2/5x22.4L)
=4/5
Partial pressure of nitrogen at 1 atm = 4/5 * 1
=4/5
Similarly Gas 2
Nitrogen moles = 80% × 2L / 22.4L
=16/10 × 22.4L
Oxygen moles = 15% × 2L /22.4L
3/10 × 22.4l
Carbon dioxide moles = 5% × 2L /22.4L
1/10 × 22.4L
Mole fraction of nitrogen = (16/10 × 22.4L) ÷ (16/10 ×22.4L+ 3/10x22.4l + 1/10X22.4L) = 4/5
Partial pressure of nitrogen at 1 atm = 4/5 * 1
=4/5
Hence, partial pressure of nitrogen in gas 1 and gas 2 are equal.
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The pressure 40.0 m under water is 494 kPa. What is this pressure in bar? =
One kilopascal of pressure is 0.01 bar pressure. Thus 494 kilopascal pressure is 4.94 bar pressure.
What is pressure?Pressure is an intensive quantity measuring the force produced on body by a mechanical stress. Pressure of a substances is inversely proportional to the volume and directly proportional to the temperature.
Pressure of a substance can be expressed in different units where, the SI unit is atm or atmospheric pressure. Other units are bar, pascal, kilopascal etc.
One kilopascal pressure = 0.01 bar. Hence, 494 kilopascal is:
(494 Kpa × 0.01 bar) / 1 kpa = 4.94 bar.
Hence, 494 Kpa pressure is 4.94 bar.
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what is the simplest formula of calcium Carbonate if it contains to 40% calcium,20% carbon, 48% oxygen?
The simplest form of calcium carbonate is CaCO3.
What is the use of Calcium carbonate?
Calcium carbonate can be used as a dietary supplement when the amount of calcium in a person's body is less. Calcium is used even as an antacid. Calcium is necessary by the body for bones, heart and muscles.
In this, we are not provided the direct masses, so we will use this percentage composition.
The number of moles of each element are:
Ca-40/40= 1
C- 20/12 = (1.6 considered to be 1)
O- 48/16 = 3
Now all the three will be divided with the lowest value and that is 1, so the ratio of Ca: C: O= 1:1:3
Therefore, the simplest formula is CaCO3.
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What is the Internal Energy of a Human Body? Define internal energy as Delta E.
SHOW ALL WORK!
20 points
The internal energy of a human body is the net energy contained in the body due motion of its particle or molecules.
In a human body the internal energy is stored . It increases when the temperature of the body rises, or when the body observes some changes. Internal energy we can say that is the sum of kinetic and potential energy of all particles in the body.
Internal energy is a state function of a system and is an extensive quantity. Every substance possesses a fixed quantity of energy which depends upon its chemical nature and also on its state of existence. Every substance have a definite value of Internal energy.
The change in the Internal energy of a reaction may be considered as the difference between the internal energies of the two states.
ΔU = [tex]E_{B}[/tex] - [tex]E_{A}[/tex] where [tex]E_{B}[/tex] and [tex]E_{A}[/tex] are the initial energies of states A and B. Or we can also write the equation as:
ΔU = ΔE
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What makes an element give off a specific color? Please explain.
The elements give off specific color because the energy of shells of different elements are specific.
Electrons when excited jump from a lower energy level to higher energy level. in higher energy level the electron are less stable . so, after some time they return from higher to lower energy level an emit some light of different wavelength of specific colors. The difference in the energy of the shells of the atom are specific. the color of different elements are different because of the light emitted and the wavelength is inversely proportional to energy.
E = hc / λ
Thus, The elements give off specific color because the energy of shells of different elements are specific.
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What is the mass of an object that has a density of 2.2 g/ml and a volume of 6.0 mL
Acetylsalicylic acid, C9H8O4, is the pain reliever in many
headache medications. A typical tablet contains 250.0 mg
of acetylsalicylic acid.
(a) Calculate the amount of acetylsalicylic acid in the tablet.
(b) Calculate the number of hydrogen atoms in the amount
of acetylsalicylic acid in the tablet determined in (a).
The amount of acetylsalicylic acid in the tablet is 0.001389 moles and the number of hydrogen atoms in the amount of acetylsalicylic acid in the tablet is 6.69 × 10²¹.
(a)
The formula of acetylsalicylic acid is C₉H₈O₄.
Molar mass of C₉H₈O₄ = 9 × atomic mass of C + 8 × atomic mass of H + 4 × atomic mass of O
= 9 × 12 + 8 × 1 + 4 × 16
= 108 + 8 + 64
= 180
No of moles of acetylsalicylic acid = Given mass / molar mass
= 0.25 / 180
= 0.001389
Hence, the number of moles of acetylsalicylic acid is 0.001389 moles.
(b)
Number of hydrogen atoms present in 1 mole of acetylsalicylic acid = 6.023 × 10²³ atoms
Number of hydrogen atom present in 0.001389 moles of acetylsalicylic acid = 0.001389 × 6.023 × 10²³ = 0.008365 = 8.36 × 10²⁰ atoms.
Now there are 8 hydrogen atoms in acetylsalicylic acid so,
Number of atoms of hydrogen in acetylsalicylic acid = 8 × 8.36 × 10²⁰ atoms = 6.69 × 10²¹ atoms.
Hence, the number of atoms of hydrogen in 0.001389 moles of acetylsalicylic acid is 6.69 × 10²¹ atoms.
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What is the energy of the light emitted from an atom if the excited electron absorbs a photon with a wavelength of 622 nm?
Explanation:
E =hv
= h*3*10power8meterpersecond ÷6.22*10power of -7m
where h is planks constant
Energy of light emitted is 4117.64 * 10 ⁻²⁵. E= hv.
What is energy of electron?
An electron's energy is determined by where it is in relation to the atom's nucleus. The distance an electron in an atom has to travel from the nucleus depends on its energy level.
The mass of an electron is roughly 1/1836 that of a proton. The intrinsic angular momentum (spin) of the electron is given in units of the decreased Planck constant and has a half-integer value.
Energy has a negative sign, meaning that an electron is drawn to the nucleus. The electron has the least energy in the first orbit, and as n grows, or as it gets less negative, the electron's energy increases.
Therefore, Energy of light emitted is 4117.64 * 10 ⁻²⁵. E= hv.
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A single molecule of water contains 1 oxygen atom and 2 hydrogen atoms
- 1 mole of H2O
How many molecules and how many atoms?
HELP !!!!!!! pls. with chemistry
Answer:
Qns no.3: it is not a correct answer
Explanation:
S has 6 outermost electrons and O has 6 outermost electrons, during bonding inorder to be stable their shouldn't be any unpaired electron in a structure. so 2 double bonds will be formed.
A typical bath tub has a volume of 42 gallons what is this volume in liters
The volume of 42 gallons in liters is 158.99 liters.
What is a bathtub?
It is a big and open container that is normally filled with water and used to bathe the body.
What is liter?
This is a unit used in measuring volume. It is not a standard unit of measurement. A liter is equivalent in volume to a millistere. the symbol is ( L).
1 gallon = 3.7854 liters
Therefore 42 gallons in liters will be:
42 *3.7854= 158.99 liters
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You have a container with a semi-permeable membrane in the middle separating a left and right side. On the left side of the container is a high concentration of salt solutes, what will happen to the solutes in the container?
What will happen to the solute molecules on the left side of the container would depend on the kind of solution present on the right side.
What is osmosis?What will happen to the solutes in the container can be explained using osmosis.
Osmosis refers to the movement of water molecules from the region of high water potential or low solute concentration to the region of low water potential or high solute concentration through a selectively permeable membrane.
Now, let us assume that the solution on the right side of the container has a lower solute concentration, which means that water molecules would move from the right side to the left side through the semi-permeable membrane. The solutes in the left side of the container would become diluted.
If it were to be the other way round, that is, the solution on the right side has more solutes than the one on the left side. Water molecules will move from the left side to the right side. Thus, the solution on the left side will become more concentrated as a result of water loss.
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15. What goes in the box for the following fusion
equation?
2 H + 2 H —> (__) + energy
1. 1
The box for the following fusion equation 2 H + 2 H —> (2H₂) + energy
An critical fusion reaction for practical electricity generation is that between deuterium and tritium (the D-T fusion reaction). It produces helium (He) and a neutron (n) and is written D + T → He + n. To the left of the arrow (earlier than the response) there are protons and 3 neutrons. The same is genuine on the proper.
Fusion guarantees a without a doubt endless shape of power that, in contrast to fossil fuels, emits 0 greenhouse gases and, not like the nuclear fission electricity used today, produces no lengthy-lifestyles radioactive waste.three.
Calculation:-
2 H + 2 H —> (2H₂) + energy
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(6 pts) A compound was analyzed and found to contain 14.14% C, 2.38% H, and 83.48% Cl.
Determine the empirical formula for this compound.
The empirical formula for this compound is CH₂Cl₂.
C = 14.14% / 12 = 1.17
H = 2.38% / 1 = 2.38
Cl = 83.48% / 35.5 = 2.35
Now, divide by 1.17
C = 1.17 / 1.17 = 1
H = 2.38 / 1.17 = 2
Cl = 2.35 / 1.17 = 2
Therefore, The empirical formula for this compound is CH₂Cl₂.
In chemistry, the empirical formula of a chemical compound is the best entire variety ratio of atoms found in a compound.
There are three main types of chemical formulas: empirical, molecular and structural. Empirical formulas display the best whole-range ratio of atoms in a compound, molecular formulas show the quantity of every kind of atom in a molecule, and structural formulas display how the atoms in a molecule are bonded to every different.
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How many grams of sodium iodide, Nal, must be used to produce 90.2 g of iodine, 1₂?
mass:
g Nal
300 grams of sodium iodide, Nal, must be used to produce 90.2 g of iodine, I₂
Sodium iodide is the ionic compound formed from the chemical reaction of sodium metal and iodine
Here given data is
I₂ has the molar mass = 253.8g/mol
So how many moles of I₂ we want to produce = 90.2 g I₂ ×1mol I₂ /253.8g/mol = 0.35 mole of I₂
Then the conversion of NaI to I₂ are
2 NaI → 2Na + I₂
0.35 mole of I₂ × 2 mole of NaI/mole of I₂ = 2 mole of NaI are needed
covert this value into gram
2 mole of NaI ×150. g NaI / mole NaI = 300 gram NaI would be needed
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How many common amino acids are formed and used by living organisms?
4
52
20
about 100
The number of common amino acids that are formed and used by living organisms is twenty (20), and nine are essential for living.
What are amino acids?Amino acids are the building blocks of proteins that are linked by peptide bonds to form biomolecules. Proteins may be composed of 20 different types of amino acids, which include 9 essential amino acids that the human cannot synthesize and must be consumed from the diet.
Amino acids include, for example, leucine, isoleucine, tryptophan, tyrosine, etc. All these molecules contain an amino group and also a carboxylic group that gives them the name of amino acids.
Therefore, with this data, we can see that amino acids are composed of an amine group and a carboxylic group and they are 20 of which nine (9) are essential because the human body cannot synthesize them and must be obtained from the foods.
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Calculate the density of an object that has the mass of 16 grams and takes up 7 cm3 of space.
Explanation:
[tex]density \: = \: mass \: over \: volume \\density \: 16grams \: over \: 7cm {}^{3} \\ density = 2.3g \cm {}^{3} [/tex]
Use the equation GPE = mx 9.8 m/s xh to calculate the gravitational potential of a 10-kg
sack of groceries on a shelf 1 m above the floor?
A 10-kg bag of goods on a shelf one meter above the ground has a gravitational potential of GPE= (10 kg)(9.8 m/s2) (1 m) GPE= 98
GRAVITATIONAL POTENTIAL: the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field. In simple terms, it can be said that gravitational potential energy is an energy that is related to gravitational force or to gravity
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Welding is an industrial process that is used to join pieces of metal. a certain mixture of gases used in welding is composed of carbon dioxide and argon. the partial pressure of carbon dioxide is
0.080 atm and the partial pressure of argon is 0.24 atm.
(a): What is the total pressure of the mixture?
(b): what fraction of the molecules in the mixture are argon?
7. If you were to draw a particulate representation of air that contained 10 particles, how many of the particles you drew would be nitrogen? how many would be oxygen? argon? carbon dioxide? explain your reasoning
The total pressure of the system is 0.32 atm an the mole fraction argon of the carbon dioxide is 0.75.
What is the partial pressure?We know that where we have a mixture of gases, each of the gases would exert pressure on the walls of the container. The pressure that is exerted on the walls of the container is what we call the pressure of the gas.
We have;
Pressure of carbon dioxide = 0.080 atm
Pressure of argon = 0.24 atm
Total pressure of the system = 0.080 atm + 0.24 atm = 0.32 atm
Partial pressure = mole fraction * total pressure
Let the mole fraction be X
0.24 = X * 0.32 atm
X = 0.24 atm/0.32 atm
X =0.75
If I am to draw the number of particles, I would draw one particle for carbon dioxide and three particles for argon based on the value of the mole fraction of the system.
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Use the drop-down menus to identify the parts of DNA.
Label A
Label B:
The DNA parts are identified as:
Label A is Nitrogen basesLabel B is Sugar phosphate backboneWhat are genetic codes?Genetic codes are nucleotide sequences in deoxyribonucleic acids (DNA) and ribonucleic acids (RNA) that determines the order of an amino acid which is the building block of proteins. It is a set of rules for translating information encoded genetic materials by living cells.
The part labelled A are called Nitrogen bases containing adenine and thymine, T pair, cytosine, C and guanine, G pair that are bound to form DNA while the Sugar phosphate backbone forms the structural base of the DNA and RNA.
The complete question is:
Use the drop-down menus to identify the parts of DNA.
Label A
Label B
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Answer: Label A is nitrogen bases
Label B is sugar phosphate backbone
