The 2 dyes only interact to the same extent with the solvent, they may not be the same dye.
Are they the same compound?We know that chromatography is the process by which we are able to separate two or more substances. In the process of thin layer chromatography, the stationary phase which is always an adsorbent coated surface is spotted with the mixture that is to be separated and added to a solvent. The extent to which the mixture dies interact with the solvent is what determines the Rf of the system.
The Rf is the degree to which each of the components of the solute are moved with respect to the pure solvent front. When two compounds have the same Rf, it means that the two components are able to interact with the solvent to the same extent.
Note that the fact that the components of the mixture interact with the solvent to the same extent does not necessarily means that they are the same compound.
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a momentary change in the electron density surrounding an atom or a molecule causes it to have a(n) dipole even if it is not normally polar. this induces a similar effect in a nearby molecule or atom and there will be a weak attraction between the two particles as a result. these weak interactions are called forces or london forces.
The required forces are instantaneous and van der wal dispersion respectively
London dispersion forces also referred to as dispersion forces,
London forces, instantaneous dipole-induced dipole forces, fluctuating induced dipole bonds, or loosely as van der Waals forces are a type of force that typically acts between atoms and molecules that are electrically symmetric, meaning that the electrons are distributed symmetrically with respect to the nucleus.
The van der Waals force is a distance-dependent interaction between atoms or molecules that was named after Dutch scientist Johannes Diderik van der Waals. These attractions are not the product of a chemical electronic link, unlike ionic or covalent connections.
They are more prone to disruption since they are relatively weak. Longer distances between interacting molecules result in a rapid disappearance of the van der Waals force.
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which of these statements is true concerning the following reaction?
na(g) → na⁺(g) e⁻.
a. This is an ionization process.
b. The energy required in the process is the definition of the electron affinity
c. Na(g) is gaining an electron
d. This reaction is exothermic
The correct answer is option A: This is an ionization process.
The statement which best describes the following chemical reaction is this is an ionization process.
The complete chemical reaction is given below.
In this reaction, the ionization of sodium is taking place.
Na(g) → Na⁺(g) e⁻
Ionization refers to a process or chemical reaction during which cations or anions are formed by the loss or gain of electrons.
If an atom loses an electron then it forms a cation i.e. positively charges atom and when it gains electrons then anions are formed i.e. negatively charged atoms.
In the above mention case, the parent sodium atom loses one electron and forms a cation. The overall process is called the ionization process.
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keep it simple i need helppppp
Answer: I believe it is 4
Explanation:
Whats is the change in temperature for the aluminum wire?
What is the change in temperature for the steel wire?
What is the change in temperature for the lead pellets?
The change in temperature for the aluminum, wire is - 79.6 °C.
The change in temperature for steel wire is - 80 °C.
The change in temperature for lead pellets is -81.2 .
Temperature is a physical quantity that is expressed as the hotness of matter or radiation. change in temperature can be calculated by subtraction of final temperature to initial temperature.
Aluminum wire is used for electrical wiring in the houses , airplanes. aluminum wire conducts electricity safely.
Steel wire is also known as steel cable and steel wire is also used in commercial and industrial purpose.
Lead pellets or lead shots are made by pouring molten lead through screens into water.
Thus, The change in temperature for the aluminum, wire is - 79.6 °C.
The change in temperature for steel wire is - 80 °C.
The change in temperature for lead pellets is -81.2 .
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describe to me what the function of each type of connective tissue is and how it helps our bodies function
Answer: Connective tissue binds various tissue together and form structural framework for the body Areolar connective tissue serves as a support framework for epithelium Adipose connective tissue store energy as fat, conserve body heat, fills space in the body pads and guards many organs and shape up the body.
Explanation:
Why is atomic number better than atomic mass for organizing the elements in the period table
Is a bright line spectra of an atom dependent on sample size?
The bright line spectra of an atom is not dependent on the sample size.
A hot gas of low density is seen opposite a cooler background which emits a bright line spectra or emission line spectrum. An emission spectrum which consists of the bright lines opposite to a dark background is a bright line spectra.
The bright line spectra depends on the number of photons. If frequency is more, there is more energy, therefore it emits more photons.
The spectra lines are caused due to the result of the emission of separate and different frequencies of light which is electromagnetic radiation from the atoms of an element. It happens when few electrons decay from an upper excited levels of energy to a lower level of energy.
Certain regions do not show lines which means that the spectrum is discrete and not continuous. It is only that few specific frequencies of light are emitted.
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How much heat is required to raise the temperature of 250.0 g of water by 52°C?
54,340 J heat is required to raise the temperature of 250 grams of water by 52 degree celsius.
What is heat and how much heat is required to raise the temperature of 250 g of water?Heat is a quantity which represents the resistance , time and current like factors.Here in this question is given the mass that is 250 grams, and the temperature that is 52 degree celsius.The equation we will use to solve out the amount of heat is Q = m x c x del T where in Q is the amount of heat to be calculated.T is the temperature and c is the specific heat , putting the values , Q = 250 x 52 x 4.18 = 54,340 J heat.Converting it to KJ the answer would be 54.34 KJ heat required to raise the temperature of 250 g of water by 52 degree celsius.To know more about heat visit:
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When carrying out the following reaction, you added an excess of Na2C2O4 (sodium oxalate). After collecting the solids and drying them in the oven, you get 2.97 g Fe2(C2O4)3 (iron (III) oxalate). Assuming you used 14 mL of FeBr3 solution, what was the initial concentration of FeBr3?
The concentration of the iron III bromide solution is 1.13 M.
What was the initial concentration?We know that the concertation is defined as the ratio of the number of moles to the volume of the solution. In this case, the balanced reaction equation that we need to work with have been shown in the image that is attached to the question.
Number of moles of iron (III) oxalate = 2.97 g/376 g/mol = 7.9 * 10^-3 moles
From the reaction equation;
2 moles of the iron III bromide yields 1 mole of the iron (III) oxalate
x moles of the iron III bromide yields 7.9 * 10^-3 moles of the iron (III) oxalate
x = 2 moles * 7.9 * 10^-3 moles/ 1 mole
= 0.0158 moles
Given that;
Number of moles = concentration/ volume
concentration = Number of moles/ volume
= 0.0158 moles/14 * 10^-3
= 1.13 M
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SEP Identify Limitations of a Model You built a yes/no flowchart that could be
used to characterize the chemical bonds of an unknown solid. Reevaluate your
flowchart, identify any limitations it may have, and explain how you might revise it
to correct or mitigate for those limitations.
The usage of yes good judgment, creates a go-with the flow chart that can be used to represent an unknown solid as ionic, polar covalent, nonpolar covalent, or steel.
A chemical bond is an enduring attraction among atoms, ions or molecules that allows the formation of chemical substances. The bond can also result from the electrostatic force among oppositely charged ions as in ionic bonds or via the sharing of electrons as in covalent bonds.
A chemical bond is a pressure of enchantment among atoms or ions. Bonds form whilst atoms proportion or transfer valence electrons. Atoms shape chemical bonds to obtain a full outer energy degree, that is the maximum solid association of electrons.
A chemical bond is what holds atoms together in molecules. Bonds stand up from the electrostatic forces between positively charged atomic nuclei and negatively charged electrons the positions of which in space are decided through quantum mechanics.
Atoms are interested in every other and be a part of together to form a molecule, we name the connection among each atom a chemical bond. The bond “holds together the atoms inside the molecule, ion, or crystal. The bonds can often final indefinitely, till they are broken aside by means of outside pressure or power.
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The element iron has naturally occuring isotopes with mass numbers of 55 amd 56. The relative abundance and atomic masses are: 14.5% have a mass of 54.876u and 85.5% have a mass of 55.998u. Calculate the average atomic mass of iron
The average atomic mass of iron = 55.83531 u
The formula for Average atomic mass is,
Average Atomic Mass = [ Abundance of Isotope 1 ] × [ Mass of Isotope 1 ] + [Abundance of Isotope 2 ] × [ Mass of Isotope 2] + [ Abundance of Isotope 3 ] × [ Mass of Isotope 3 ] + so on....
∴ Average Atomic Mass = [0.145] x [54.876] + [0.855] x [55.998]
= 7.95702 + 47.87829
= 55.83531 u
∴ The average atomic mass of iron = 55.83531 u
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clay minerals, silica (sio2), and dissolved potassium bicarbonate in the soil water are products of which process?
For ferromagnesian silicate minerals like olivine and biotite, oxidation of iron plays a significant role in the chemical weathering process.
What is chemical weathering and examples?When water absorbs the minerals in rocks, it causes chemical weathering, which produces new chemicals. Hydrolysis is another name for this. An illustration is when water enters the region around granite. Inside the rock, feldspar crystals undergo chemical reactions that results in clay minerals.
What are the four chemical weathering processes?Solution, carbonated, hydration, oxidation, and reduction are significant chemical weathering reactions. Via chemical reactions involving oxygen, surface and/or soil water, and various acids, such processes operate on the rocks to break them down, dissolve them, or reduce then to a fine clastic form.
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What is the volume do 482 liters of gas occupy if the temperature of the gas is changed from standard temperature to 27°C while the pressure is held at standard pressure?
Volume of gas occupy if the temperature of the gas is changed is 529.6 litres
It is given that
Initial volume of gas = V1 = 482 liters
Initial temperature = T1 = 273 K
Final temperature = T2 = 273 + 27 = 300 K
Final volume = V2 = ?
Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. The absolute temperature is temperature measured with the Kelvin scale.
The relationship between volume and temperature is:
V1 / T1 = V2 / T2
where V1 and T1 are the initial volume and absolute temperature and V2 and T2 are the final volume and absolute temperature (the Kelvin temperature, not the Celsius temperature).
V1 / T1 = V2 / T2
482 litres/273 K = V2/300 K
V2 = 529.6 litres
Hence, Volume of gas occupy is 529.6 litres
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At what temperature Celsius will 19.4 g of molecular oxygen, O2, exert a pressure of 1820 mm Hg in a 5.12 L
cylinder?
Answer:−27∘C, 19.4 g of molecular oxygen exerts a pressure of 1820 mmHg in a 5.12 L cylinder.
Explanation:The molar mass of O2
is 32.00 g/mol. So, the number of mol (n) of O2 present in 19.4 g of mass is calculated as shown below:
n =19.4g
32.00g/mol
=0.60625mol
the normal ph of the body fluids of 7.4 is considered: slightly basic. slightly acidic. very basic. very acidic.
The normal pH of the body fluids of 7.4 is considered slightly basic in nature.
Generally, the pH of Blood ranges from 7.35-7.45 which is slightly basic or alkaline. The pH scale is a great indicator for understanding the given substance is acidic or alkaline or neutral.
The scale ranges form 1 to 14 and the divisions from 1 to 6 is considered acidic, 7 is considered neutral and 8 to 14 is considered alkaline. Since the scale of body fluids falls under 7.4, it is slightly basic.
But comparing the pH of blood with the pH of acid in the stomach, the pH of stomach is more acidic and ranges from 1.5-3.5 in the pH scale.
Therefore, the pH of blood is considered to be slightly alkaline.
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if the final pressure of water vapor was 0.875 atm and the temperature is 400 k, how many moles of h2o was produced assuming that the reaction went to completion in a 250 l engine
If the final pressure of water vapor was 0.875 atm and the temperature is 400K, then 6.66 moles of H₂O was produced if we assume that the reaction went to completion in a 250L engine.
It is given to us that the pressure of water vapor is 0.875 atm and the temperature is 400K and the volume of the engine is 250L. Then, the number of moles of water could be found by the following formula,
PV = nRT
Here, R refers to the Universal Gas constant and n refers to the number of moles. Thus, by substituting the values we get the number of moles of H₂O as,
0.875x250 = nx0.0821x400
218.75 = 32.84n
n = 218.75/32.84
n = 6.66
Therefore, the number of moles of water molecules is 6.6
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calculate the heat that must be supplied to 8.6 g of ne(g) at 0.15 atm to raise its temper- ature from 25◦c to 49◦c at constant pressure. assume that neon behaves as an ideal gas. answer in units of j.
The amount of heat that must be supplied to raise the temperature of Neon gas from 25°C to 49°C is 212.6J.
How to calculate heat energy?The amount of heat required to change the temperature of a substance can be calculated by using the following formula:
Q = mc∆T
Where;
Q = quantity of heat absorbed or released m = mass of substancec = specific heat capacity∆T = change in temperatureAccording to this question, 8.6 g of Ne(g) at 0.15 atm needs it temperature raised from 25°C to 49°C at constant pressure. The amount of heat required can be calculated as follows:
Q = 8.6 × 1.03 × {49 - 25}
Q = 212.6J
Therefore, 212.6J is the quantity of heat energy required to change the temperature.
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neodymium-144 undergoes beta decay to form what daughter isotope and escay particle?
The daughter isotope will be Pm.
Isotopes can be defined as the molecule which posses identical atomic number and differ atomic mass.
When Nd is emitted beta particle the atomic number will be increased by 1 amu and no changes in atomic mass. The atomic number of Nd is 60 , after the beta decay it will be get converted in to Pm which atomic number is 61.
[tex]Nd^{144}[/tex] +[tex]\beta^{0} _{1}[/tex] → [tex]Pm^{144}[/tex]
Therefore, the daughter nuclei will be Pm.
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a solution contains 7.58 g of calcium ions in a total volume of 850 ml. calculate the concentration of calcium ions in eq/l and meq/l.
About 40% of a total blood calcium is linked to plasma proteins, predominantly albumin, with a calcium ion concentration of 0.00891765 eq/l..
What are the benefits of calcium concentration?For overall health, calcium is crucial. Calcium is utilized in some form by almost all of our body's cells. Our bodies need calcium in the neurological system, muscles, heart, and bones, among other places. In addition to supporting our bodies, our bones also store calcium.
How much calcium is there in the plasma?Adults typically have plasma calcium values of 2.5 mmol/L (or 5 mEq/L, 10 mg/dL1) or higher. Different amounts of protein-bound, complexed, or ionized calcium can be found in plasma. About 45% of a serum calcium is incorporated into plasma proteins, primarily albumin.
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iron forms compounds as both a ferrous fe(ii) and a ferric fe(iii) ion. these two ions differ by:
Fe(ii) and Fe(iii) ions differ by E) 1 electron.
Ferric is the term used for an iron atom that has lost three electrons from the valence shell, on the other hand, ferrous is the term used for an iron atom that has lost two electrons from the valence shell.
As one shares two electrons while the other shares three electrons therefore they differ by one electron.
Fe(iii) is more stable due to its half-filled subshell while Fe(ii) is unstable in nature. There is a partially-filled d orbital in Fe(ii) resulting in its instability as half-filled and completely filled orbitals are more stable as compared to the partially filled orbitals.
Although a part of your question is missing, you might be referring to this question:
Iron forms compounds as both a ferrous Fe(II) and a ferric Fe(III) ion. These two ions differ by:
A) 1 proton
B) 1 neutron
C) 2 protons
D) 2 electrons
E) 1 electron
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HELP ME PLSSS ASAP!!!!!
Compare and contrast the paths that P-waves and S-waves take through Earth. How do you think this information helps geologists understand Earth's interior?
S waves can only pass through solids, whereas P waves can pass through liquid, solids, and gases. This data is used by scientists to calculate the composition of the Earth. Seismometers all across the world can measure the S and P waves that come from an earthquake that strikes on one side of the planet, for instance.
What is meant by seismic waves?When materials suddenly move within the Earth, such when they slip along a fault during an earthquake, seismic waves are produced. Seismic waves can also be produced by volcanic eruptions, explosions, landslides, avalanches, and even swiftly flowing rivers.
Earthquakes typically result from subsurface rock breaking unexpectedly and rapid movement along a fault. The seismic waves that cause the ground to tremble are brought on by this quick release of energy.
S waves can only pass through solids, whereas P waves can pass through liquid, solids, and gases. This data is used by scientists to calculate the composition of the Earth. Seismometers all across the world can measure the S and P waves that come from an earthquake that strikes on one side of the planet, for instance.
There are two different types of waves produced by earthquakes: primary (P) and secondary (S). Based on when they come and how they feel on the surface, they are classified. P waves, also known as primary waves, arrive first, followed by S waves, even comprehended as secondary waves. The ground trembles when an earthquake happens because of both waves.
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Which of the apparatus diagrams shows the correct set-up of equipment for evaporation? Give your answer A,B, C or D.
Answer:
a
Explanation:
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Peter woke up in the middle of night in darkness. Without being able to see, he was able to make his way to the bathroom without running into any objects in his path.
Which of the following best describes how he is able to do this?
A. Peter's brain received visual information from sensory receptors other than his eyes, so there was no change in how his body responded to the darkness around him.
B. Peter's brain used only stored memories as input when he moved through the darkness, as all sensory receptors are directly tied to the visual system.
C. Peter's brain still received messages from his other sensory receptors, which his brain combined with stored memories in order to move through the darkness.
D. Peter's brain used only messages received from his other sensory receptors when he moved through the darkness, as the visual system is not an important part of the central nervous system.
Peter woke up in the middle of night in darkness without being able to see, he was able to make his way to the bathroom without running into any objects in his path then peter's brain still received messages from his other sensory receptors, which his brain combined with stored memories in order to move through the darkness
Darkness is the absence or deficiency of light and when darkness is come there is not enough light to see properly and it is only in the night mode
Here Peter woke up in the middle of night in darkness without being able to see, he was able to make his way to the bathroom without running into any objects in his path and then he move toward the bathroom then sensory receptors is the specialized organ in which eyes, ears and nose mouth as well as internal organ each receptor type conveys a distinct sensory modality to integrate into a single perceptual frame eventually and because of this sensory organs the peter will go safe toward the bathroom and peter's brain still received messages from his other sensory receptors, which his brain combined with stored memories in order to move through the darkness is the correct statement
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Answer:
(C) Peter's brain still received messages from his other sensory receptors, which his brain combined with stored memories in order to move through the darkness.
Explanation:
Question 4
A 'renewable' resource is one that...
Question 4 options:
A. is replenished at a rate that keeps up with (or exceeds) consumption.
B. is replenished at a rate that exceeds its consumption.
C. is consumed at a rate that exceeds up its production.
D. is replenished at a rate that does not keep up with consumption.
A renewable resource is one that is consumed at a rate that exceeds its production. Option C.
Renewable resources are inexhaustible sources of energy and can provide a continuous source of clean energy. A resource that replaces itself when used. Resources that are readily replenished or can be replenished such as woodwind water and solar energy. Renewable resources include solar energy and windfall.
Earth's heat planet matter ocean currents ocean temperature differences, and tidal energy. Renewable resources are infinite resources because they can be replenished. Solar wind and geothermal energy are examples of renewable raw materials as they are considered inexhaustible. Water is also considered a renewable natural resource as long as there is rainfall.
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How many Atoms does CuO have?
Answer:
Explanation:
Cupric oxide has the +2 oxidation state of copper, and it has the chemical formula CuO. One copper atom associates one oxygen atom.
In which of these compounds would you find only dispersion forces existing between the molecules? i. Nh3 ii. Ch2cl2 iii. Ccl4 iv. Co2.
Compounds in which only dispersion forces exist between the molecules are option iii. CCl4 & iv. CO2.
A nonpolar covalent molecule would have the most effective dispersion forces with another nonpolar covalent molecule.
NH3 has 3 N-H bonds & 1 N-lone pair bond. Here both types of bonds are non-polar therefore the whole compound is polar, thus NH₃ molecule has three types of bonds namely; dipole-dipole, hydrogen bonding, and dispersion forces.CH2Cl2 has 2 C-H bonds & 2 C-Cl bonds and both bonds are polar therefore this compound is polar.CCl4 has all similar types of bonds i.e; 4 C-Cl bonds thus, the compound is non-polar so, has only dispersion forces existing between CCl4 molecules.CO2 has dispersion forces or van der Waals forces as its best intermolecular pressure. On account, that CO2 is made up of one carbon and 2 oxygen, and each carbon and oxygen are non-metals, it additionally has covalent bonds.The compounds in which only dispersion forces exist between the molecules are: iii. CCl4 & iv. CO2
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What is the function of the endoplasmic reticulum
Answer:
Functions of Endoplasmic Reticulum
Endoplasmic reticulum function includes the Golgi apparatus, lysosomes, plasma membrane, etc.
In addition, it is responsible for transport. Transport of carbohydrates and proteins to another organelle.
They provide a wide area for cellular reactions.
Furthermore, it helps in formation. Formation of the nuclear membrane at the time of cell division.
In the skeletal framework formation, they play an important role.
Most noteworthy, it plays an important role in the synthesis of lipids, glycogen, proteins. Also, other steroids like progesterone, testosterone, and cholesterols, etc
hope it helps you
please hurry i need this test due today
Answer:
11: D
12: C
last picture: A
Explanation:
hope this helps
. a sample of helium gas in a piston has a volume of 86.4 ml under a pressure of 447 torr. what will be the volume of the helium if the pressure on the piston is increased to 1,240 torr? assume that the temperature and the amount of the gas remain constant.
Boyle's Rule: If the temperature and volume of the ideal gas remain constant in a closed system, the absolute pressure that a given mass of the gas exerts is inversely proportional to the space it takes up.
P1V1 = P2V2
447 × 86.4 = 1240 × V2
V2 = 447 × 86.4 / 1240
V2 = 31.146 mL
At constant temperature (T) and molecular weight (M), volume (V) decreases as pressure (P) increases (n)
PV = nRT
V = nRT/P
V = 4.55 × 0.082 × 285 / 7.32
Where R = ideal gas constant = 0.082 (L) (atm) (mole) -1(K) -1
V is equal to 14.53 L or 14530 cm3.
Charles's Rule: When pressure is held constant, a given mass of gas has a straight relationship between its volume and absolute temperature.
V1T2 = V2T1
1 × 263 = V2 × 310
V2 = 1 × 310 / 263
V2 = 1. 179 L
Volume (V) increases at constant pressure (P) and mole as temperature (T) rises (n)
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The variable part of an amino acid, which is the unique chemical structure that distinguishes one amino acid from another, is the __________.
Answer:
All amino acids also contain a variable R-group (also known as a "side chain"), and it is this group that distinguishes one amino acid from another.
Explanation:
The side chain of an amino acid differentiates one amino acid from another , good luck..
The variable part of an amino acid, which is the unique chemical structure that distinguishes one amino acid from another, is the side chain.
What is amino acid ?Organic substances known as amino acids have both amino and carboxylic acid functional groups. Alpha-amino acids, which make up proteins, are by far the most significant of the hundreds of amino acids found in nature. In the genetic code, only 22 alpha amino acids are present.
The amino group, carboxyl group, and side-chain or R group are the three components of an amino acid, and they are all joined to the -carbon. One amino acid can be distinguished from another by their R group.
Amino acids, which are tiny chemical compounds with an alpha (central) carbon atom coupled to an amino group, a carboxyl group, a hydrogen atom, and a variable component known as a side chain, are the building blocks of proteins.
Thus, The variable part of an radical acid, which is the unique chemical structure that distinguishes one amino acid from another, is the side chain.
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