what is the chance that the first five letters can form the word apple, by rearrangement if necessary?

The grams of water are needed to dissolve 25.31 g of the potassium nitrate  in order to prepare the 0.1982 M solution is 1263 g.

The expression of the molality is as follows :

Molality = moles solute / kg solvent  

The kg of solvent = moles solute / molality  

The moles of solute = mass / molar mass  

The moles of solute = 25.31 g / 101.1 g/mole  

The moles of solute = 0.2503 mole

The amount in kg solvent = 0.2503 mole / 0.1982 m  

The amount in kg solvent = 1.263 kg  

The amount in kg solvent = 1263 g

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mix 100.0 g of water at 21.4 oc with 75.0 g of water at 72.0 oc then final temperature of the mixed water is 34.9°C.

To find the final temperature of the mixed water, we can use the principle of heat transfer. The heat lost by the hot water is equal to the heat gained by the cold water. The formula for calculating heat transfer is: Q = mcΔT, where Q is the heat transfer, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
First, we can calculate the heat lost by the hot water using Q = mcΔT. The mass of the hot water is 75.0 g, the specific heat capacity of water is 4.184 J/g°C, and the initial temperature of the hot water is 72.0°C, while the final temperature is unknown. Therefore, the heat lost by the hot water is (75.0 g)(4.184 J/g°C)(72.0°C - x), where x is the final temperature of the mixed water.
Next, we can calculate the heat gained by the cold water using the same formula, but with the mass, specific heat capacity, and initial temperature of the cold water. The heat gained by the cold water is (100.0 g)(4.184 J/g°C)(x - 21.4°C).

Since the heat lost by the hot water is equal to the heat gained by the cold water, we can set these two expressions equal to each other and solve for x:
(75.0 g)(4.184 J/g°C)(72.0°C - x) = (100.0 g)(4.184 J/g°C)(x - 21.4°C)
Solving for x gives x = 34.9°C.

Therefore, the final temperature of the mixed water is 34.9°C.

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Covalent bonding is present in Quartz. Covalent bonds result in a high melting point. Covalent solids are insoluble in most solvents.

Quartz is very hard to melt because quartz is unsteady above 870 Celsius, and molten silica is wobbling below 1713 Celsius. In the interval between 870 and 1713 degrees, quartz tends to change to tridymite or cristobalite, not melt. It is hard to heat quartz to melt, in the region of 1650 Celsius

Melting point: The melting point of quartz is higher than 1700°C. Curie temperature for alpha and beta quartz: The Curie warmth for quartz is 573°C.

So we can conclude that Crystal quartz has a very particular melting point. Because quartz glass is a single component it doesn't form eutectics

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Answer:

Avogadro's number

Explanation:

Answer:

The mole concept is a unit used in chemistry to express amounts of a substance. It is defined as the amount of a substance that contains Avogadro's number of particles. It is important in chemistry because it allows for accurate and consistent measurement of chemical reactions.

Explanation:

Properties  of  Iron Rusting is Chemical;Gasoline Burning is Chemical;Solid Sulfur is Physical ;Shattering is Physical ;Lye Feeling Slippery is Physical.

Iron Rusting: Chemical - Iron rusting is a chemical reaction between iron, oxygen and water which results in the formation of hydrated iron oxide (Fe2O3).

Gasoline Burning: Chemical - Gasoline burning is a combustion reaction between gasoline and oxygen which results in the formation of carbon dioxide (CO2) and water (H2O).

Solid Sulfur: Physical - Solid sulfur is a physical property because it is a solid at room temperature and pressure.

Shattering: Physical - Shattering is a physical properties because it is a change in the physical structure of an object.

Lye Feeling Slippery: Physical - Lye feeling slippery is a physical property because it is a tactile sensation caused by the physical properties of lye.

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Complete question:Each of the following properties as being physical as being physical or chemical

iron rusting; gasoline burning ;solid sulfur ;shaltering and lye feeling slippery

Answer:

The length of the spines that it produces is the trait that is entirely passed from one generation to the next.

Answer:

C. the length of the spines that it produces

The correct option is d.)1s3  Explanation s- orbital can hold a maximum of 2 electrons.

1s3- There is only one s orbital per energy level, and each orbital can hold a maximum of two electrons, so there can not be 3s electrons at any energy level. The Aufbau principle dictates the manner in which electrons are filled in the atomic orbitals of an atom in its ground state.

It states that electrons are filled into atomic orbitals in the increasing order of orbital energy level. According to the Aufbau principle, the available atomic orbitals with the lowest energy levels are occupied before those with higher energy levels.

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The features that make H₂O a polar molecule are:

It is a bond that occurs when the bonding atoms have a difference in electronegativity causing the generation of an area with higher electron density creating a positive pole and a negative pole.

The oxygen atom in water has a partial negative charge, while the hydrogen atoms have a partial positive charge. This results in an overall dipole moment, with the molecule having a slightly positive end and a slightly negative end.

H₂O is a polar molecule due to its bent molecular shape, an uneven distribution of electron density, and uneven electron distribution within each bond of the molecule. This results in an overall electrical charge for the molecule.

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Molar mass of MgF2 = 62.30 g/mol and freezing point = 0 °C - 0.764 °C = -0.764 °C

a) To calculate the freezing point depression of a solution, we can use the formula:

ΔTf = Kf x molality

where ΔTf is the change in freezing point, Kf is the freezing point depression constant for the solvent (water) and molality is the concentration of the solute (FeCl3) in moles per kilogram of solvent (water).

The molality of the solution can be calculated as follows:

mass of FeCl3 = 10.6 g

molar mass of FeCl3 = 162.2 g/mol

moles of FeCl3 = mass / molar mass = 10.6 g / 162.2 g/mol = 0.0654 mol

mass of water = 159 g

molality = moles of solute / mass of solvent (in kg) = 0.0654 mol / 0.159 kg = 0.411 mol/kg

The freezing point depression constant for water is 1.86 °C/m. Thus, the change in freezing point can be calculated as follows:

ΔTf = Kf x molality = 1.86 °C/m x 0.411 mol/kg = 0.764 °C

The freezing point of pure water is 0 °C, so the freezing point of the solution is:

freezing point = 0 °C - 0.764 °C = -0.764 °C

b) To calculate the boiling point elevation of a solution, we can use the formula:

ΔTb = Kb x molality

where ΔTb is the change in boiling point, Kb is the boiling point elevation constant for the solvent (water) and molality is the concentration of the solute (KCl) in moles per kilogram of solvent (water).

The molality of the solution can be calculated as follows:

mass of KCl = 3.9 g

molar mass of KCl = 74.55 g/mol

moles of KCl = mass / molar mass = 3.9 g / 74.55 g/mol = 0.0523 mol

mass of water = 100 g (assuming the total mass of the solution is 103.9 g, with 3.9 g KCl and 100 g water)

molality = moles of solute / mass of solvent (in kg) = 0.0523 mol / 0.1 kg = 0.523 mol/kg

The boiling point elevation constant for water is 0.52 °C/m. Thus, the change in boiling point can be calculated as follows:

ΔTb = Kb x molality = 0.52 °C/m x 0.523 mol/kg = 0.272 °C

The boiling point of pure water is 100 °C, so the boiling point of the solution is:

boiling point = 100 °C + 0.272 °C = 100.272 °C

c) To calculate the freezing point depression of a solution, we can use the formula:

ΔTf = Kf x molality

where ΔTf is the change in freezing point, Kf is the freezing point depression constant for the solvent (water) and molality is the concentration of the solute (MgF2) in moles per kilogram of solvent (water).

The molality of the solution can be calculated as follows:

molarity of MgF2 = 0.168 mol/L

molar mass of MgF2 = 62.30 g/mol

mass of MgF2 in 1 L of solution = molarity x volume x m

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The balanced equation for the reaction of zinc with hydrochloric acid is:

Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g)

A balanced equation is a chemical equation in which the number of atoms of each element is equal on both sides of the equation. This means that the equation is in agreement with the law of conservation of matter, which states that matter cannot be created or destroyed, only transformed from one form to another.

Balancing an equation involves adjusting the coefficients in front of the chemical formulas so that the number of atoms of each element is the same on both sides of the equation.

Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g)

In this reaction, zinc (Zn) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2).

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The molar mass of 34.26 g/mol is consistent with the molar mass of nitrogen gas (N2), which is 28.02 g/mol. Therefore, the unknown gas is likely nitrogen.

To identify the unknown gas, you need to determine its molar mass. The ideal gas law can be used to calculate the molar mass. The ideal gas law is given as:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in kelvin. To calculate the molar mass, we'll rearrange the ideal gas law to solve for n:

n = PV / RT

The gas constant R has a value of 0.0821 L-atm/mol-K. To convert the temperature to kelvin, add 273.15 to the temperature in °C. The pressure must be converted from torr to atm. One atm is equal to 760 torr, so:

P = 209 torr / 760 torr/atm

P = 0.2758 atm

The volume must also be converted from mL to L. 1 L = 1000 mL, so:

V = 732 mL / 1000 mL/L

V = 0.732 L

Now that we have all the required values, we can plug them into the ideal gas law equation to calculate the number of moles:

n = 0.2758 atm * 0.732 L / (0.0821 L-atm/mol-K * (21 + 273.15 K))

n = 0.0108 mol.

Since the mass of the gas is given as 0.37 g, we can calculate the molar mass as:

Molar mass = mass / moles

= 0.37 g / 0.0108 mol

= 34.26 g/mol

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The amount of HCl reagent (36.0%, specific gravity - 1.18) required to prepare 1 litre of 0.1M HCl solution is [tex]0.3085 ml[/tex].

To prepare 1 litre of 0.1M HCl solution, we need to calculate the amount of HCl reagent (36.0%, Specific gravity - 1.18) required.

HCl has a molecular weight of 36.46 g/mol..

Now, the equation to calculate the amount of HCl required is:

Amount of HCl = [tex]\frac{ (Molarity of solution * Volume of solution * Molecular Weight of HCl) }{(Percentage purity of HCl * Specific Gravity of HCl)}[/tex]

So, the amount of HCl reagent required to prepare 1 litre of 0.1M HCl solution is:

Amount of HCl = [tex]\frac{(0.1 * 1 *36.46) }{(36.0 x 1.18)}= 0.3085 g[/tex]

Now, 1 g of HCl reagent = 1 ml of HCl reagent

Therefore, the amount of HCl reagent (36.0%, specific gravity - 1.18) required to prepare 1 litre of 0.1M HCl solution is[tex]0.3085 ml[/tex].

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Hydrofluoric acid (HF), and Bromide (Br-) are weak electrolyte, according to the options given. Hence the correct option is (a), and (c) respectively.

A weak electrolyte is a substance that only partially dissociates into ions when dissolved in a solvent. The extent of dissociation depends on the concentration of the electrolyte in the solution and the strength of the bond between the ions.

Based on this definition, the following substances can be classified as weak electrolytes:

a. Hydrofluoric acid (HF) - Hydrofluoric acid is a weak acid that only partially dissociates into ions in aqueous solution.

c. Hydrogen Bromide (HBr) - Hydrogen Bromide is a weak base that dissociates only slightly in water.

On the other hand, the following substances are strong electrolytes and dissociate completely into ions when dissolved in water:

b. Hydrochloric acid (HCl) - Hydrochloric acid is a strong acid that dissociates completely into hydrogen (H+) and chloride (Cl-) ions in water.

d. Hydrogen iodide (HI) - Hydrogen iodide is a strong acid that dissociates completely into hydrogen (H+) and iodide (I-) ions in water.

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Saturated hydrocarbons and unsaturated hydrocarbons are two types of organic compounds that differ in the number and arrangement of their carbon-carbon bonds.

Saturated hydrocarbons, also known as alkanes, contain only single bonds between the carbon atoms in their molecular structure. They are said to be "saturated" because they contain the maximum number of hydrogen atoms that can be bonded to the carbon atoms. As a result, they have a linear or branched chain structure, and they are solid or semi-solid at room temperature. Examples of saturated hydrocarbons include methane (CH4), ethane (C2H6), and propane (C3H8).Unsaturated hydrocarbons, on the other hand, contain one or more double or triple bonds between their carbon atoms. This means that they have fewer hydrogen atoms bonded to their carbon atoms than is possible in a saturated hydrocarbon.

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Answer:

The EF of the compound is CH2O and the MF is C6H12O6.

Explanation:

To find the empirical formula (EF) of the compound, we need to determine the simplest whole number ratio of the atoms in the compound. We can assume we have 100 g of the compound, which means we have:

40 g of carbon

6.67 g of hydrogen

53.33 g of oxygen (since the rest of the compound is oxygen)

Next, we can convert the masses to moles:

Moles of carbon = 40 g / 12.01 g/mol = 3.33 mol

Moles of hydrogen = 6.67 g / 1.01 g/mol = 6.61 mol

Moles of oxygen = 53.33 g / 16.00 g/mol = 3.33 mol

We then divide each of the mole values by the smallest number of moles, which is 3.33, to get the simplest whole number ratio:

Carbon: 3.33 / 3.33 = 1

Hydrogen: 6.61 / 3.33 = 1.98 (rounded to 2)

Oxygen: 3.33 / 3.33 = 1

So the EF of the compound is CH2O.

To find the molecular formula (MF), we need to know the molecular mass of the EF. The empirical formula mass (EFM) of CH2O is:

EFM = (1 x 12.01 g/mol) + (2 x 1.01 g/mol) + (1 x 16.00 g/mol) = 30.03 g/mol

We can then calculate the molecular formula mass (MFM) by dividing the given molecular mass (180 g/mol) by the EFM:

MFM = 180 g/mol / 30.03 g/mol = 6

This means the MF is 6 times the EF, or C6H12O6. Therefore

As per balanced reaction 4 moles of potassium nitrate gives 5 moles of oxygen. So Here 0.724 moles of oxygen is formed

The balanced reaction for the decomposition of potassium nitrate is as follows

4KNO₃ -------------> 2K₂0 + 2N₂ + 5O₂

4 moles of potassium nitrate gives 5 moles of oxygen.

Molar mass of KNO₃ = 101.11 g/mol

Mass of KNO₃ decomposed = 58.6 g

Number of moles of KNO₃ = Mass of KNO₃/ molar mass of KNO₃

                                            = 58.6 / 101.11 = 0.579 moles

Ratio of KNO₃ : O₂ = 4:5

4/5 = 0.579/x

x = 0.579 × 5/4  = 0.724 moles

So when 0.579 moles of potassium nitrate decomposes 0.724 moles of oxygen is formed.

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It is true that the rate of evaporation is equal to the rate of condensation in a dynamic equilibrium between the liquid state and the gas state.

Since the rate of evaporation is not zero, the vapour pressure increases until the evaporation and condensation rates are equal. The partial pressure of vapour in the container equals the equilibrium vapour pressure of the liquid at this time, indicating that the system is in dynamic equilibrium.

At the liquid water-air interface, the opposing processes of evaporation and condensation take place concurrently. The number of water molecules that transform from liquid to gas each second is the rate of evaporation. The temperature of the liquid water has a major role in determining the rate of evaporation. The rate of evaporation increases with the temperature of the liquid water.

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The correct order for atomic radius for Mg, Na, P, Si, and Ar is:
D) Na > Mg > Si > P > Ar.

The atomic radius is the distance from the center of an atom to the outermost shell of electrons. Atomic radius generally increases as you move down a group and from right to left across a period in the periodic table.

Na and Mg are in the same period (row) of the periodic table, but Na has a larger atomic radius than Mg because Na has one more energy level than Mg. Si has a smaller atomic radius than Mg because Si is located to the right of Mg in the same period, and moving from left to right across a period, atomic radius generally decreases. P has a larger atomic radius than Si because P is located one row below Si, and moving down a group, atomic radius generally increases. Finally, Ar has the smallest atomic radius because it is a noble gas and its valence shell is completely filled with electrons, making it difficult to add more electrons.

Therefore, the correct order of atomic radius for these elements is Na > Mg > Si > P > Ar.

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Answer: chlorofluorocarbon

Explanation:

chlorofluorocarbon

Answer:

Carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) are greenhouse gases. Chlorofluorocarbons (CFCs) are also considered greenhouse gases, but they are now largely banned due to their damaging effects on the ozone layer.

Explanation:

When an alkene is treated with O3 (ozone), it undergoes an oxidative cleavage reaction, also known as ozonolysis.

The overall reaction can be represented as follows:

Alkene + O3 → Ozonide Intermediate → Carbonyl Compound 1 + Carbonyl Compound 2

When an alkene is treated with zinc (Zn) metal, it undergoes a reduction reaction known as the "reductive coupling" or "dimerization" of alkenes.

The exact mechanism of the reaction can vary depending on the structure of the alkene and the reaction conditions, but the general reaction can be represented as follows:

2 Alkene molecules + Zn → Dimerized product

For example, when ethene (C2H4) is treated with zinc, it undergoes reductive coupling to form but-2-ene (C4H8) as the dimerized product:

2 C2H4 + Zn → C4H8

When an alkene is treated with water (H2O), it can undergo either hydration or hydrolysis, depending on the reaction conditions.

Alkene + H2O → Alcohol

When an alkene is treated with beryllium (Be) metal, it can undergo a reduction reaction known as beryllium-catalyzed reduction. This reaction is also known as the Sabatier- Senderens reaction.

The general reaction can be represented as follows:

Alkene + H2 (as a source of H) + Be → Alkane

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The answer to the multiple choice question is 70 kilocalories provided by 10 grams of pure alcohol.

Alcohol is a type of macronutrient that provides energy to the body. It is considered the fourth macronutrient, besides carbohydrates, proteins, and fats. Alcohol is broken down into acetaldehyde and then into acetate, which is converted into energy in the body.

One gram of alcohol provides 7 kilocalories of energy, which is almost double the amount provided by carbohydrates and proteins. The energy derived from alcohol is not used as efficiently by the body as energy derived from other macronutrients, such as carbohydrates, proteins, and fats. This is because the energy derived from alcohol is quickly metabolized by the liver, leading to a temporary increase in energy but also making the body more prone to energy crashes.

Therefore, while alcohol does provide energy to the body, it is important to consume it in moderation to avoid negative health effects.

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When ATP is broken down, it releases energy in the form of a phosphate bond, which can be used to power metabolic processes.

Metabolism is the set of life-sustaining chemical reactions that occur in living organisms. These biochemical processes allow organisms to grow and reproduce, maintain their structures, and respond to their environment. Metabolism of energy within cells is known as cellular metabolism. Metabolism can be divided into two categories, catabolism and anabolism. Catabolism is the breakdown of molecules to obtain energy. Anabolism is the building up of molecules to create other molecules and store energy. Metabolic reactions involve the energy that is used to power the cell and the molecules that are used as building blocks for biosynthesis.

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The amount of the Br₂ in moles was formed during the first 15.0 s of the reaction is 0.0396 mol.

The rection is as :

2HBr  --->   H₂  +  Br₂

The rate of disappearance of HBr = - (1/2) d[HBr] / dt

The rate of formation of H₂  = + (1/ 2 )d [H₂ ] / dt

The rate of formation of  Br₂ = + (1/2) [  Br₂] / dt

Average rate = - (1/2) d[HBr] / dt

                       = - (1/2) ( 0.512 - 0.600 ) / (25 - 0 )

                       = 0.00176 M/s

d[ Br₂] / dt = 0.00176 M/s

[ Br₂]  = 0.0264 M

The moles of  Br₂ = 0.0264 × 1.25

                              = 0.0396 mol

This question is incomplete, the complete question is :

Consider the reaction. 2 HBr(g) ¡ H2(g) + Br2(g) a. Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. b. In the first 25.0 s of this reaction, the concentration of HBr drops from 0.600 M to 0.512 M. Calculate the average rate of the reaction during this time interval.c. If the volume of the reaction vessel in part b is 1.50 L, what amount of Br2 (in moles) forms during the first 15.0 s of the reaction?

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The number of molecules of carbon molecules of oxygen that would be required is 9.03 × 10²³ molecules.

The number of molecules of a substance can be calculated by multiplying the number of moles by Avogadro's number as follows:

no of molecules = no of moles × 6.02 × 10²³

According to this question, if 18 grams of carbon react with oxygen to produce carbon dioxide. The number of moles of carbon can be calculated as follows:

no of moles of carbon = 18g ÷ 12g/mol = 1.5 moles

no of molecules = 1.5 moles × 6.02 × 10²³

no of molecules = 9.03 × 10²³ molecules

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The correct answer is Carbon Dioxide is formed as a result of the sodium bicarbonate wash.

Each of the molecules of carbon dioxide, with the chemical formula CO2, has one carbon atom covalently doubly bonded to two oxygen atoms. It occurs in the gas state at room temperature. Carbon dioxide acts as a greenhouse gas in the atmosphere because it absorbs infrared light rays despite being transparent to visible light. From pre-industrial levels of 280 parts per million (ppm) to a trace gas of 421 ppm, or nearly 0.04% by volume, it has grown (as of May 2022). [9] [10] The combustion of fossil fuels is the primary cause of both these high CO2 concentrations and climate change. Dissolved carbon dioxide is present in the ocean, ice caps, lakes, and groundwater.

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Answer:

Coal, oil, and natural gas are all fossil fuels that were formed from the remains of plants and animals that lived millions of years ago.

Coal was formed from the remains of plants that grew in vast swamps and bogs during the Carboniferous period, about 300 million years ago. Over time, these plants were buried by sediment and subjected to heat and pressure, which transformed them into coal.

Oil and natural gas were formed from the remains of tiny marine organisms, such as plankton and algae, that lived in the oceans and seas hundreds of millions of years ago. When these organisms died, their remains sank to the bottom of the ocean and were buried by sediment. Over time, heat and pressure transformed the organic material into oil and natural gas.

In terms of reserve abundance, natural gas is currently in the greatest supply. According to the US Energy Information Administration (EIA), global natural gas reserves were estimated at 198 trillion cubic meters as of January 2022. This is followed by oil, with global reserves estimated at 1.73 trillion barrels, and coal, with global reserves estimated at 1.03 trillion short tons. However, it's important to note that the availability and distribution of these resources can vary widely by region, and factors such as extraction costs, market demand, and environmental regulations can all influence their commercial viability.

Depending on the molecule's chemical composition, they can be purines or pyrimidines.

Nucleotide building blocks are the monomers (single molecules) that make up nucleic acids, such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). They are classified as either purines or pyrimidines, depending on the chemical structure of the molecule.

Purines: Adenine (A), Guanine (G)

Pyrimidines: Cytosine (C), Thymine (T), Uracil (U)

Sorted by name: Adenine (A), Cytosine (C), Guanine (G), Thymine (T), Uracil (U)

Sorted by classification: Purines: Adenine (A), Guanine (G) Pyrimidines: Cytosine (C), Thymine (T), Uracil (U).A nucleotide is the basic structural unit of nucleic acids such as DNA and RNA.

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complete question:sort these nucleotide building blocks by their name or classification. from below image