Answer:
The main function of chloroplast in a plant is to prepare food for the plant, by the process of photosynthetic in the plant cell
Chloroplast contains a green pigment
Explanation:
Answer:
The main function of chloroplasts in a plant cell is to perform photosynthesis. Chloroplasts contain chlorophyll, which absorbs light energy and converts it into chemical energy through a process called the light-dependent reactions. The chemical energy is then used to produce glucose and other sugars from carbon dioxide and water in a process called the light-independent reactions or the Calvin cycle. This process provides the plant with its energy source, as well as produces oxygen as a by-product.
Explanation:
Each of the following are either a weak acid or a weak base that will partially ionize to form 2 ions. Complete the ionization equation for each.
HCN + H2O ⇌
HF + H2O ⇌
NH4OH + H2O ⇌
C5H5N + H2O ⇌
A weak acid or a weak base is a substance that partially ionizes to form two ions in aqueous solution.
What exactly do you mean by aqueous solution?
An aqueous solution is basically a solution in which the solvent is water. Aqueous solutions can contain salts, acids, bases and other compounds. These solutions are often used in chemistry, biology and medicine for a variety of purposes.
HCN + H2O ⇌ H+ + CN- (weak acid)
HF + H2O ⇌ H+ + F- (weak acid)
NH4OH + H2O ⇌ NH4+ + OH- (weak base)
C5H5N + H2O ⇌ H+ + C5H5N- (weak acid)
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A student runs an experiment to figure out if the size of a wire changes how well it conducts electricity. She uses 5 different widths of copper wire and attaches each to a multimeter to measure
the resistance in the wires. The data collected is shown below.
Wire 1-12 Ohms
Wire 2-17 Ohms
Wire 3-9 Ohms
Wire 4-14 Ohms
Wire 5-6 Ohms
What is the independent variable in this experiment?
A. The multimeter.
B. The resistance values.
C. The material of the wires, copper.
D. The widths of the wires.
The independent variable is the the widths of the wires.
What is the independent variable?
In an experimental setup, the independent variable is the variable that is manipulated or changed by the researcher. It is also referred to as the "predictor variable" or the "explanatory variable."
The idea behind manipulating the independent variable is to observe its effect on another variable, which is called the dependent variable. The dependent variable is the variable that is thought to be affected by the independent variable.
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What is the net ionic equation for the following reaction?
H2O2 + 2KI + 2HCl → 2H2O + I2 + 2KCl
H[tex]_2[/tex]O[tex]_2[/tex] + 2ICl [tex]\rightarrow[/tex] I[tex]_2[/tex] + 2OH⁻ is the net ionic equation for the given reaction. The net ionic equation is frequently employed in acid-base neutralization, double displacement, and redox processes.
What is net ionic equation?The net ionic equation is indeed a chemical equation for something like a reaction that only includes the species that are involved in the reaction. The net ionic equation is frequently employed in acid-base neutralization, double displacement, and redox processes.
In those other terms, the net ionic includes elements to water-based processes involving strong electrolytes.
H[tex]_2[/tex]O[tex]_2[/tex] + 2KI + 2HCl → 2H[tex]_2[/tex]O + I[tex]_2[/tex]+ 2KCl
H[tex]_2[/tex]O[tex]_2[/tex] + 2K⁺+2I⁻ + 2H⁺ + 2Cl⁻ → 2H⁺ + 2OH⁻ + I[tex]_2[/tex]+ 2K⁺ + 2Cl⁻
H[tex]_2[/tex]O[tex]_2[/tex] + 2ICl [tex]\rightarrow[/tex] I[tex]_2[/tex] + 2OH⁻
Therefore, H[tex]_2[/tex]O[tex]_2[/tex] + 2ICl [tex]\rightarrow[/tex] I[tex]_2[/tex] + 2OH⁻ is the net ionic equation for the given reaction.
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The density of muscle tissue is approximately 1.055 g/mL. How many grams of muscle tissue would be contained in 24 mL of muscle tissue?
Colorimetric Analysis of Asprin Chem Lab:
Students prepared a solution by hydrolyzing 0.3219 g of a crushed aspirin tablet in NaOH and then diluting with DI water in a 100-mL volumetric flask. Next, they transferred 1.50 mL of the solution to a 50-mL volumetric flask and diluted to the mark with FeCl3-KCl-HCl solution. The absorbance of the dilution was 0.346. Using their standard curve, they determined the concentration to be 5.02 × 10e-4 mol/L. If an aspirin tablet weighs 0.4267 g, determine the mass of ASA (in mg) per tablet.
*Note the answer is 400 mg and the Molarity of the standard solution is unknown.
-To account for not using the whole crushed tablet multiply by the ratio of m(tablet)/m(tablet used).
-I'm not sure which step in the calculations to apply this ratio.
-Any help would be greatly appreciated!
The mass of ASA - Acetylsalicylic acid per tablet is 214.9 mg. The number of moles present in the tablet, is 0.001190.
For this experiment it is important to find the number of moles of ASA present in the solution. By doing this we will get the amount of ASA in the tablet also.
Students prepared a solution by hydrolyzing 0.3219 g of a crushed aspirin tablet in NaOH and then diluting with DI water in a 100-mL volumetric flask.
Number of moles = mass of ASA / molar mass of ASA
The molar mass of ASA = 180.16 g/mol
Therefore, Number of moles = 0.3219 g / 180.16 g/mol
= 0.001785 mol.
Now finding the number of moles present in the tablet,
Moles in tablet = (moles of ASA from solution) x (mass of tablet / mass of solution)
= 0.001785 mol x (0.4267 g / 0.3219 g x 1.50 mL / 50 mL)
= 0.001190 mol
Now finding the mass of ASA,
Mass of ASA per tablet = (moles of ASA in tablet) x (molar mass of ASA)
= 0.001190 mol x 180.16 g/mol
= 0.2149 g or 214.9 mg
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In going from room temperature (25 C) to 20 C above room temperature, the rate of reaction triples. Calculate the activation energy for the reaction .
Answer: 67890iuhnm, m
Explanation:b ghjit6789 k k
a specie with initial concentration 1.4×10^-2 mol L-1 decay by first order kinetics with a rate constant 2.35×10^2L mol-1 s-1. what is the half-life if this specie?
Answer:
293 ms
Explanation:
The half-life of a first-order reaction can be calculated using the following formula:
t1/2 = 0.693 / k
Where t1/2 is the half-life and k is the rate constant.
For this reaction, the rate constant is 2.35 x 10^2 L/mol/s, so:
t1/2 = 0.693 / (2.35 x 10^2 L/mol/s) = 0.293 / (2.35 x 10^2) s = 0.000293 s = 293 ms
Answer:
0.293 / 2.35 × 10^2 seconds.
Explanation:
The half-life of a first order reaction can be calculated using the equation:
t1/2 = 0.693 / k
where t1/2 is the half-life, k is the rate constant, and 0.693 is the natural logarithm of 2.
Substituting the values given in the question:
t1/2 = 0.693 / 2.35 × 10^2 L mol-1 s-1 = 0.293 / 2.35 × 10^2 s
So, the half-life of the species is approximately 0.293 / 2.35 × 10^2 seconds.
Which statement best describes the difference between a physical change and a chemical change? Responses A chemical change results in a new element being formed, and a physical change results in a new compound being formed. A chemical change results in a new element being formed, and a physical change results in a new compound being formed. A physical change produces a new element, and a chemical change results in a bond breaking between atoms. A physical change produces a new element, and a chemical change results in a bond breaking between atoms. A chemical change does not result in a new substance being formed, whereas a physical change does. A chemical change does not result in a new substance being formed, whereas a physical change does. A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
A physical change is a change to a substance that does not result in the formation of a new substance.
What is formation ?Formation is the process of creating something new. It can refer to the creation of an organization, structure, or system. It is often used in business, when a company is established, or when a new product or service is created. It can also refer to the development of an idea or concept, such as a strategic plan or marketing campaign. Formation is an essential part of any entrepreneurial venture, and involves the development of a plan for a business, including the selection of personnel, market research, and the development of a financial structure. Formation is also used to refer to the development of a team or organization, and the process of creating and maintaining a cohesive and effective team of individuals.
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Estimate the number of photon emitted in one second from a LED lamp of 50 watts, if the band-gap energy of the LED is 2.0 eV and with 90% energy conversion from electricity to light energy
Number of photons emitted = 2167200 photons/second
What are photons emitted?Photons are particles of light that are emitted from atoms. They exist in a wide range of energies and wavelengths and can be emitted from both natural and artificial sources.
Photons are emitted when an electron in an atom moves from a higher energy state to a lower energy state.
1. Number of photons emitted = (Energy conversion efficiency) × (Power in Watts) × (eV/J) × (Avogadro's number) × (1/Energy of band gap)
Number of photons emitted = (0.9) × (50) × (1.6 x 10-19/1) × (6.02 x 1023) × (1/2.0)
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How many water molecules are in a block of ice containing 2.00 mol
of water ( H2O)?
According to the question the answer is 1.204 x 10^24 molecules of water.
What is molecules?Molecules are the smallest particles of matter that can exist in a stable form. They are made of two or more atoms that are held together by chemical bonds. Molecules are the basis of all living things, and they are the building blocks of all matter. They come in a variety of shapes and sizes, and they can be composed of atoms of different elements. Molecules can be found in the air, in liquids, and in solids. They can be found in both organic and inorganic compounds, and they are essential components of life. Molecules play an important role in many chemical and biological processes, and they can be used to create new materials and products.
The number of water molecules in a block of ice containing 2.00 mol of water (H2O) can be calculated using the Avogadro's number, which is 6.02 x 10^23 molecules per mol. Therefore, the answer is 1.204 x 10^24 molecules of water.
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Using tabulated ∆° values in the text, determine the enthalpy change (in kJ) that occurs during the formation of water from its elements.
32 ()+2 ()→22(l) ∆=?
The enthalpy of formation of H₂ and O₂ are zero. Then , the enthalpy of formation of water is 285 kJ.
What is enthalpy of formation ?Enthalpy change of a chemical reaction of physical change is the change in heat energy absorbed or evolved during the change or reaction. It is represented as ΔHf⁰.
The enthalpy of formation of elements in molecular state is zero. Hence the enthalpy of formation of H₂ and O₂ are zero.
The enthalpy of formation of water = -285 kJ.
enthalpy of reaction = enthalpy of products - enthalpy of reactants.
ΔHr = -285 kJ - 0+0 = - 285 kJ.
Therefore, the enthalpy change during the formation of water from its elements is - 285 kJ.
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Your complete question is as follows:
Using tabulated ∆Hf° values in the text, determine the enthalpy change (in kJ) that occurs during the formation of water from its elements:
2 H2 (g) + O2 (g) → 2 H2O (l) ∆H = ?
The sun provides _____ to a plant, when a person eats the plant, ____ is released and then transforms into___ when the person goes for a run
Answer: no answer
Explanation:
What is the mass of 4.00cm ^ 3 of sodium with density = 0.97g / cm?
Answer:
he given density is 0.97 g/cm³, and the volume is 4.00 cm³.
To find the mass, we can use the formula:mass = density x volume
Substituting the given values,
we get:mass = 0.97 g/cm³ x 4.00 cm³mass = 3.88 g
Therefore, the mass of 4.00 cm³ of sodium with a density of 0.97 g/cm³ is 3.88 g.
Explanation:
Calculate the freezing point of 0.300 molal aqueous solution of magnesium chloride,
(MgCl₂). Assume that the MgCl₂ has ionized completely and the Kf= 1.853 °C / molal
Answer: answer of the question is given below
Explanation:
Answer:
0.556 °C.
Explanation:
The freezing point depression of a solution can be calculated using the equation:
ΔTf = Kf x molality
Where ΔTf is the change in freezing point, Kf is the molal freezing point depression constant, and molality is the concentration of solute in mol/kg.
For magnesium chloride, Kf = 1.853 °C/molal. The molality of the solution can be calculated as follows:
molality = moles of solute / mass of solvent (in kilograms)
= 0.300 mol / (0.300 mol x 1000 g/mol) = 0.300 g/1000 g = 0.0003 kg/kg = 0.300 mol/kg
Now, substituting the values into the equation:
ΔTf = Kf x molality
= 1.853 °C/molal x 0.300 mol/kg
= 0.556 °C
So the freezing point of the 0.300 molal aqueous solution of magnesium chloride will be lower than the freezing point of pure water by 0.556 °C.
ALLEN
What property is dependent on the mass of the object?
A: temperature
B: phase
C: state
D: heat
Answer:
D Heat
Explanation:
Tell me if you need explain
ALLEN
True or false if an employee asked to use a powered air, purifying respirator in place of a negative pressure respirator the employer must provide the PARP to the employee
True. If an employee requests to use a Powered Air-Purifying Respirator (PAPR) in place of a negative pressure respirator.
define Powered Air-Purifying Respirator ?
A Powered Air-Purifying Respirator (PAPR) is a type of respirator that uses a motor to draw air through a filter to clean it before delivering it to the wearer's breathing zone. PAPRs are designed to protect the wearer from inhaling harmful substances, such as dust, smoke, fumes, and particulate matter.
True. If an employee requests to use a Powered Air-Purifying Respirator (PAPR) in place of a negative pressure respirator, the employer must provide the PAPR to the employee if it provides the same or greater level of protection as the negative pressure respirator. This is because the employer has a legal responsibility to provide a safe and healthy work environment for employees, and to ensure that employees are protected from workplace hazards to the extent feasible. Providing a PAPR may be necessary to achieve this goal, depending on the specific circumstances of the workplace and the hazards present.
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In the laboratory, a student adds 14.0 g of manganese(II) nitrate to a 250. mL volumetric flask and adds water to the mark on the neck of the flask. Calculate the concentration (in mol/L) of manganese(II) nitrate, the manganese(II) ion and the nitrate ion in the solution.
[Mn(NO3)2] = ?M
[Mn2+] = ?M
[NO3-] = ?M
The number of moles of 14 g of manganese nitrate is 0.078 moles. Then molarity of the solution is 0.312 M. The molarity of Mn²⁺ in the solution is 0.312 M and the molarity [NO₃⁻] is 0.624 M.
What is molarity ?Molarity of a solution is the ratio of number of moles of the solute to the volume of solution in liters. It is the common term for representing the concentration of a solution.
Molar mass of manganese nitrate = 178.9 g/mol
no.of moles in 14 g = 14/178.9 = 0.078 moles.
then molarity of [Mn (NO₃)₂] = 0.078/0.25 L = 0.312 M.
In one mole of the solution there is one mole of Mn²⁺.
then [Mn²⁺ ] = [Mn (NO₃)₂] = 0.312 M.
One mole of the compound contains 2 moles of the nitrate ions. Hence,
[NO₃⁻] = 2 × 0.312 = 0.626 M.
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Question 11 of 20:
Select the best answer for the question.
11. A gray dog pulled a sled with a mass of 25 kilograms 100 meters. A brown dog
pulled a sled with the same mass across the same distance, but in half the time.
Which statement compares the two correctly?
O A. Both dogs used the same amount of work, and the brown dog used less power.
O B. Both dogs did the same amount of work, and the brown dog used more power.
O C. The brown dog did more work and used less power.
O D. The brown dog did less work, and both dogs used the same amount of power.
Mark for review (Will be highlighted on the review page)
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Both dogs used the same amount of work, and the brown dog used less power.
What is the difference between work and power?Work and power are both concepts in physics that are related to the transfer of energy, but they are not the same thing. Work refers to the amount of energy transferred to or from an object as a result of a force acting on it over a certain distance, whereas power refers to the rate at which work is done.
In other words, work is a measure of the total energy transferred, while power is a measure of how quickly that energy is transferred. Mathematically, work is defined as the product of the force applied to an object and the distance over which that force is applied, while power is defined as the rate of doing work, or the amount of work done per unit time.
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3. In chemistry, a structural isomer of a compound is another compound whose molecule has the same number of atoms of each element, but with logically distinct bonds between them. Consider an alkene compound. Draw all possible structural isomers for an alkene with a molecular formula C6H12.
[4 marks]
All the possible structural isomers for the molecular formula C₆H₁₂ are given here. All of them has the same number of carbon and hydrogen atoms but with different structures.
What are structural isomers ?Isomers are compounds with the same chemical formula but different structures, spatial conformation, geometry, functional groups etc. There are are different kinds of isomers.
Structural isomers are compounds with same formula but different structures. In the case alkanes, alkenes or alkynes, the position of the branches or groups attached can be of different but formula stay the the same.
Here, the compound with the formula, C₆H₁₂ have structures similar of alkenes and can have ring structures as shown in the image. The position of the double bond or the branches are different in each isomers.
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C5H12(l)+8O2(g)→5CO2(g)+6H2O(g) express answers as intergers
The balanced equation for the reaction of pentane (C5H12) with oxygen gas (O2) to produce carbon dioxide (CO2) and water (H2O) is: C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(g).
What is reaction?Reaction is the process of responding to a stimulus or situation. It can be physical, emotional, mental, or social. Reactions can vary depending on the individual and the context, and they can be positive or negative. Examples of reactions include feeling anger, joy, sadness, or fear when faced with a situation.
The ratio of reactants to products in this reaction is 1:5:6:8. This means that for every 1 molecule of pentane (C5H12), 5 molecules of carbon dioxide (CO2), 6 molecules of water (H2O), and 8 molecules of oxygen gas (O2) are required. Therefore, the answer to the question is 8, as 8 molecules of oxygen gas (O2) are needed to react with 1 molecule of pentane (C5H12).
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Which answer choice BEST explains why the cyclist must be fed if she wants to continue to pedal her bike?
A. All of her stored chemical energy was transformed.
B. She was hungry.
C. She destroyed all of her chemical energy while riding her bike.
D. She needed to create more stored chemical energy.
Calculate the quantity of O₂ would be required to generate 13.0 mol of NO₂ in the reaction below assuming the reaction has only 67.1% yield.
2 NO (g) + O₂ (g) → 2 NO₂ (g)
Solving the Question
We're given:
[tex]2 NO_{(g)} + O_{2(g)}\rightarrow 2 NO_{2 (g)}[/tex][tex]n_{NO_2}=13.0\hspace{4}mol[/tex][tex]\%\hspace{4}yield=67.1\%[/tex]First, let's calculate the theoretical yield of NO2.
⇒ [tex]\%\hspace{4}yield=\dfrac{actual\hspace{4}yield}{theoretical\hspace{4}yield}[/tex]
The yield of NO2 we must produce is 13.0 mol.
⇒ [tex]\%\hspace{4}yield=\dfrac{13.0}{theoretical\hspace{4}yield}[/tex]
We're also given that the percentage yield of this reaction is 67.1%.
⇒ [tex]0.671=\dfrac{13.0}{theoretical\hspace{4}yield}[/tex]
⇒ [tex]theoretical\hspace{4}yield=\dfrac{13.0}{0.671}\\\\theoretical\hspace{4}yield=19.3740685544\hspace{4}mol[/tex]
First, construct a mole ratio between O2 and NO2.
From the balanced chemical equation, we know that 1 mol of O2 can produce 2 mol of NO2:
⇒ [tex]\dfrac{n_{O_2}}{1}=\dfrac{n_{NO_2}}{2}[/tex]
We're given that we must theoretically produce 19.3740685544 mol of NO2:
⇒ [tex]\dfrac{n_{O_2}}{1}=\dfrac{19.3740685544}{2}[/tex]
⇒ [tex]n_{O_2}=9.6870342772\hspace{4}mol[/tex]
Round to significant figures (3):
⇒ [tex]n_{O_2}=9.69\hspace{4}mol[/tex]
Answer[tex]n_{O_2}=9.69\hspace{4}mol[/tex]
think about the sugar and water as made up of tiny particles
Both sugar and water are made of molecules and atoms.
What is meant by atoms and molecules?A tiny or very small particle of a chemical element is known as an atom, which may or may not present independently. Molecules are defined as a groups of atoms has the bond fuse together which represents the smallest part of a compound. Two or more identical or different atoms are chemically bonded with each other.
The smallest particle of a material that has all of the physical and chemical properties of the material. Molecules are made up of only one or more than one atom. Sugar has a solid state of matter whereas water has a liquid state of matter. Sugar which is a solid has more hard particles as compared to water whereas a liquid has less compact particles.
So we can conclude that both are made of molecules and atoms.
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The Haber Process involves nitrogen gas combining with hydrogen gas to produce
ammonia.
N. + 3H2 - 2NH,
10.0 grams of nitrogen gas is reacted with 10.0 grams of hydrogen gas.
Find the following: the molar mass of reactants and products, the limiting reactant.
the excess reactant, the amount of ammonia produced.
17.04 grams
12.16 grams
hydrogen gas
28.02 grams
nitrogen gas
1. The limiting reactant
2. The excess reactant
3. Molar mass of hydrogen gas
4. Molar mass of nitrogen gas
5. Molar mass of ammonia (NHb)
6. Amount of ammonia produced
2.02 grams
The limiting reactant: Nitrogen gas (N2)
The excess reactant: Hydrogen gas (H₂)
Molar mass of hydrogen gas: 2.016 grams/mol
Molar mass of nitrogen gas: 28.02 grams/mol
Molar mass of ammonia (NH3): 17.04 grams/mol
What is Haber process ?The Haber process is a high-temperature, pressurized ammonia-gas synthesis. According to the balanced reaction, three moles of hydrogen and one mole of nitrogen gas yield two moles of ammonia gas.
Molecular mass of H₂ is 2 g/mol
molecular mass of N₂ is 28 g/mol
No.of moles in 10 g of H₂ is 10/2
= 5 moles.
no.of moles in 10 g of N₂ is 10/28
= 0.35 moles.
Here, the nitrogen gas is fewer in amount, and it is the limiting reactant in the reaction and hydrogen is the excess reactant.
Molar mass of NH₃ = 17 g/mol
1 mole or 28 g of nitrogen gives 2 moles or 34 g of ammonia. Hence, 10 g of nitrogen gas will give,
(10 × 34) / 28
= 12.14 g of NH₃.
Thus, 12.14 g of NH₃ is produced by 10 g of nitrogen gas in this reaction.
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Which answer choice best describes the law of conservation of energy?
A. Energy can be created but not destroyed.
B. Energy can be both created and destroyed.
C. Energy cannot be created nor destroyed it just changes form.
D. Energy cannot be created, but it can be destroyed.
Which of the following is
the correct way to express
0.0000321 in scientific
notation?
A. 3.21 x 105
B. 32.1 x 106
C. 3.21 x 10-5
D. 32.1 x 10-6
Which coefficients correctly balance the equation below
Ba3N2+HOH - -> Ba(OH)2+NH3
1,6,1,2
1,3,3,2
1,6,3,2
2,6,3,2
The coefficients that correctly balance the given equation is 1. 6, 3,2
The correct option is C
What is a balanced equation of a reaction?A balanced equation of a reaction is an equation in which the moles of atoms of elements of the reactants are equal to the moles of atoms of the product.
According to the law of conservation of matter, matter is neither created nor destroyed, hence, the mass of the reactants must be equal to the mass of products at the end of any given chemical reaction.
The balanced equation of the given reaction is as follows:
Ba₃N₂+ 6 HOH - -> 3 Ba(OH)₂ + 2 NH₃
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What is the importance of the pH scale in determining the acidity or basicity of a solution?
Answer:
because it provides a numerical value for the concentration of hydrogen ions in a solution.
Explanation:
Answer:
The pH scale is important in determining the acidity or basicity of a solution because it provides a numerical value for the concentration of hydrogen ions in a solution. The pH of a solution ranges from 0-14, with values below 7 being acidic, values above 7 being basic, and 7 being neutral.
Explanation:
The chemical formula for cesium chloride is Cs Cl.
A chemist measured the amount of cesium chloride produced during an experiment. She finds that 30.8 g of cesium chloride is produced. Calculate the number
of moles of cesium chloride produced.
Round your answer to 3 significant digits.
The number of moles of cesium chloride produced 0.183 moles.
How to calculate number of moles?The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.
According to this question, the chemical formula for cesium chloride is CsCl. A chemist measured the amount of cesium chloride produced during an experiment. She finds that 30.8 g of cesium chloride is produced.
The molar mass of Cesium chloride is 168.36 g/mol
Moles = 30.8g ÷ 168.36g/lol
moles = 0.183 moles
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Question 6 of 10
Which shows an isomer of the molecule below?
O A.
OB.
O C.
O D.
The molecule D shows an isomer of the molecule given below. Therefore, option D is correct.
What is an isomer ?The term Isomer is defined as the compounds that contain exactly the same number of atoms, i.e., they have exactly the same empirical formula, but differ from each other by the way in which the atoms are arranged.
Isomerism is the phenomenon in which more than one compounds have the same chemical formula, but they have different chemical structures.
Therefore, given molecule and D molecule are isomers of each other because they have the same number of atoms, but they differ in arrangement of the atoms.
Thus, option D is correct.
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