The volume of O₂ (at STP) formed when 50.0 g of KClO₃ decomposes according to the given reaction is 22.4 L.
To calculate the volume of O₂ formed at STP when 50.0 g of KClO₃ decomposes, we need to first write the balanced chemical equation:
2 KClO₃ → 2 KCl + 3 O₂
From the balanced equation, we can see that 2 moles of KClO₃ produce 3 moles of O₂. Therefore, we need to first calculate the number of moles of KClO₃ in 50.0 g of the compound:
Number of moles of KClO₃ = Mass ÷ Molar mass
= 50.0 g ÷ 122.55 g/mol
= 0.408 moles
Now we can use the mole ratio from the balanced equation to find the number of moles of O₂ produced:
Number of moles of O₂ = Number of moles of KClO₃ × (3 moles of O₂ ÷ 2 moles of KClO₃)
= 0.408 moles × (3 ÷ 2)
= 0.612 moles
Finally, we can use the ideal gas law to find the volume of O₂ at STP:
PV = nRT
where P = 1 atm, V = volume of gas, n = number of moles, R = 0.0821 L·atm/mol·K (gas constant), and T = 273 K.
Rearranging the equation to solve for V, we get:
V = nRT ÷ P
= (0.612 mol)(0.0821 L·atm/mol·K)(273 K) ÷ (1 atm)
= 16.2 L
However, this is the volume of O₂ at standard temperature and pressure (STP) for 0°C and 1 atm, while the given temperature is 273 K. Therefore, we need to convert the volume at STP to the volume at the given temperature using the following equation:
V₂ = V₁ × (T₂ ÷ T₁)
where V₁ is the volume at STP (22.4 L), T₁ is the temperature at STP (273 K), V₂ is the volume at the given temperature, and T₂ is the given temperature (273 K).
Substituting the values, we get:
V₂ = 22.4 L × (273 K ÷ 273 K) = 22.4 L
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How can we classify a salt basic,acidic or neutral??
Answer: neutral
Explanation: Neutral salts are those salts that are neither acidic nor basic
hope this helps
:) :)
Question 3 of 10
Which of the following best describes an empirical formula?
OA. A chemical formula that identifies the oxidation state of each
element
OB. A chemical formula that lists the percent composition of each
element
OC. A chemical formula that uses the numbers of atoms of each
element as they actually occur in a molecule
D. A chemical formula that shows the relative number of each type of
atom in a molecule, using the smallest possible ratio
A chemical formula that shows the relative number of each type of atom in a molecule, using the smallest possible ratio, best describes an empirical formula. The correct option is D
What is empirical formula ?The simplest whole number ratio of atoms in a chemical molecule is its empirical formula.
The empirical formula for glucose, for instance, is CH2O, which indicates that the proportion of carbon to hydrogen to oxygen atoms in glucose is 1:2:1. However, the empirical formula is a multiple of the true molecular formula for glucose, which is C6H12O6.
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Calculate the hydronium ion concentration in an aqueous solution with a poh of 4.33 at 25°c.
Taking into account the definition of pH and pOH, the hydronium ion concentration in an aqueous solution with a pOH of 4.33 at 25°c is 2.138×10⁻¹⁰ M.
Definition of pHpH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or hydronium ion H₃O⁺:
pH= - log [H⁺]= - log [H₃O⁺]
Definition of pOH
Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
Relationship between pH and pOHThe following relationship can be established between pH and pOH:
pOH + pH= 14
Concentration of hydronium ionsBeing pOH= 4.33, pH is calculated as:
pH + 4.33= 14
pH= 14 - 4.33
pH= 9.67
Replacing in the definition of pH the concentration of hydronium ions is obtained:
- log [H₃O⁺]= 9.67
Solving:
[H₃O⁺]= 10⁻⁹ ⁶⁷
[H₃O⁺]= 2.138×10⁻¹⁰ M
Finally, the hydronium ion concentration in an aqueous solution with a pOH of 4.33 at 25°c is 2.138×10⁻¹⁰ M.
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if the pco2 in the plasma increases, what effect will this have on plasma ph?
When the partial pressure of carbon dioxide (pCO2) in the plasma increases, this leads to a decrease in plasma pH, resulting in a more acidic environment. The relationship between pCO2 and pH is described by the Henderson-Hasselbalch equation, which helps predict the acid-base balance in the body.
An increase in pCO2 levels indicates that more CO2 is being produced or less is being eliminated. As CO2 dissolves in the plasma, it forms carbonic acid (H2CO3), which subsequently dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-). The increase in H+ ions is what causes the decrease in pH, signifying a more acidic environment.
This change in pH can disrupt the body's normal homeostasis and is commonly referred to as respiratory acidosis. The body's response to this imbalance involves various buffering systems, such as the bicarbonate buffer system, to help restore pH to a normal range.
In conclusion, an increase in plasma pCO2 levels leads to a decrease in plasma pH, creating a more acidic environment. This can disrupt the body's normal functioning and prompt compensatory mechanisms to restore the acid-base balance.
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Which waves carries the most energy?
Answer:
I think c
Explanation:
I HOPE IT'S HELPthere are 4 wavelengths that are emitted from a hydrogen atom that can be seen by the human eye. Two of the wavelengths are the same color. what color are they?
a) red, blue, and violet
b) orange, yellow, and green
C) red, orange, and yellow
D) blue, indigo, and violet
Answer:
The correct answer is - a) red, blue and violet.
Explanation:
In the visible spectrum, the hydrogen atom emits four different wavelengths that are visible to the human eye. The four wavelengths are these lines are 656 nm, 486 nm, 434 and 410 nm. Shorter wavelengths are not visible to human eyes fall in ultravoilet lights at less than 400 nm.
The H-α line is the red color wavelength at 656 nm, the blue color has two different wavelengths that are 486 nm sometimes called cyan, and 434 nm, and violet at 410 nm.
0.2 mol of the transition metal (M) comhine with excess chlorine gas to form 30.3 g of MCl3. What is the electronic configuration of the ion of the metal (M) in this compound?
(Sc=45, Cr=52, Fe=55.8, Co=58.9, Cl=35.5)
A) [Ar], 3d3
B)[Ar], 3d5
C)[Ar], 3d6
D) [Ne], 3s2 3p6
Given metallic chloride formula =MCl3
Means M has valency 3It belongs to Nitrogen(N) family.
The elements given by Nitrogen,Phosphorus,Arsenic,Stubnum(Tin),Bismuth.But the condition is that its transition element.
The element is vanedium(V)EC given by
\(\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^3\)
\(\\ \sf\longmapsto [Ar]3d^3\)
What is the measurement of the amount of light passing through the solution ?
Which of the following is a strong acid?
Answer:
C. HCl
Explanation:
HCl is a strong acid because it dissociates almost completely.
Write the correct equilibrium constant expression for the following reaction equation.
N2O2(g)⇋N2(g)+O2(g)
The correct equilibrium constant expression for the given reaction equation is:
Kc = [N2][O2]/[N2O2]
The equilibrium constant expression is determined by the stoichiometry of the balanced chemical equation. In this case, the balanced equation is:
N2O2(g) ⇋ N2(g) + O2(g)
According to the Law of Mass Action, the equilibrium constant expression is given by the concentrations of the products divided by the concentrations of the reactants, each raised to the power of their respective stoichiometric coefficients.
Thus, for the reaction N2O2(g) ⇋ N2(g) + O2(g), the equilibrium constant expression is:
Kc = [N2][O2]/[N2O2]
Here, [N2] represents the concentration of nitrogen gas (N2), [O2] represents the concentration of oxygen gas (O2), and [N2O2] represents the concentration of dinitrogen tetroxide gas (N2O2) at equilibrium.
The equilibrium constant expression for the given reaction equation N2O2(g) ⇋ N2(g) + O2(g) is Kc = [N2][O2]/[N2O2]. This expression allows us to quantify the extent of the reaction at equilibrium based on the concentrations of the reactants and products.
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what are two design improvements that can be made to the flameless ration heater that to make it safer for air travel and more efficient at heating objects?
Answer:
1) adding a safety switch that automatically turns off the heater when it reaches a certain temperature
2) incorporating reflective material around the heating element to increase heat output.
Explanation:
chatgpt
Organisms typically have more than one form of each gene. If one form can mask the appearance of another form, that form is considered _______ the other form.
A.
better than
B.
dominant over
C.
recessive to
D.
worse than
If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.
What are dominant alleles?According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.
When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.
For the dominant allele, however, only one copy is needed for it to be expressed.
In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.
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What would be the mass of 3 moles of water molecules?
a
54 grams
b 40 grams
C
30 grams
d 20 grams
Answer:
\(\boxed {\boxed {\sf A. \ 54 \ grams }}\)
Explanation:
To convert from moles to grams, we must use the molar mass.
Recall that water's molecular formula is H₂O. It contains hydrogen and oxygen. Look up the two elements masses on the Periodic Table.
Hydrogen (H): 1.008 g/mol Oxygen (O): 15.999 g/molNow, use these masses to find water's mass. The subscript of 2 tells us there are 2 atoms of hydrogen, so we multiply hydrogen's mass by 2 and add oxygen's.
H₂O= 2(1.008 g/mol) + 15.999 g/mol = 18.015 g/molUse the molar mass as a ratio.
\(\frac{18.015 \ g \ H_2 O}{ 1 \ mol \ H_2 O}\)
Multiply by the given number of moles.
\(3 \ mol \ H_2O*\frac{18.015 \ g \ H_2 O}{ 1 \ mol \ H_2 O}\)
The moles of water will cancel.
\(3 *\frac{18.015 \ g \ H_2 O}{ 1 }\)
\(3 *{18.015 \ g \ H_2 O}\)
\(54.045 \ g \ H_2O\)
Round to the nearest whole number. The 0 in the tenth place tells us to leave the number as is.
\(54 \ g \ H_2O\)
There are about 54 grams of water in 3 moles.
Answer:
54 grams
Explanation:
First step is to find what one mole of water is in grams.
Water is H2O so that means we have two moles of Hydrogen.
H - 2 grams (on periodic table)
We have one mole of Oxygen.
O - 16 grams (on periodic table)
Add 2 and 16 to get 18 total grams in one molecule of H2O
Now multiply 3 times 18 to know how many grams in 3 moles of H2O
You end with
3x18=54 grams
To separate a mixture of hard candies and
marbles, the most efficient method would be
Answer:
depends on the size andt shape i think hand picking would be most efficient.
Explanation:
The most efficient method to separate a mixture of hard candies and marbles would be to use a physical property that is unique to one of the components of the mixture.
In this case, the physical property that can be exploited is the difference in size and shape between the hard candies and the marbles. Since marbles are solid spherical objects and hard candies are irregularly shaped, it is possible to employ a sieving or filtration method to separate them.
A sieve or a mesh with openings smaller than the marbles but larger than the hard candies can be used. By pouring the mixture onto the sieve and shaking it gently, the marbles will be retained on the sieve while the smaller-sized hard candies will pass through the openings and be collected separately.
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Please help How many moles of a gas sample are in 5.0 L container at 215 K and 342 kPa(The gas constant is 8.31 L kPa/mol K) Round your answer to one decimal place and enter the number only with no units.
Answer
1.0 mol
Explanation
Given:
Volume, V = 5.0 L
Temperature, T = 215 K
Pressure, P = 342 kPa
The gas constant, R = 8.31 L kPa/mol K
What to find:
The number of moles of the gas sample.
Step-step-solution:
The number of moles of the gas can be determine using the ideal gas equation formula:
\(PV=nRT\)Put the given values into the formula and calculate for n:
\(\begin{gathered} 342\times5.0=n\times8.31\times215 \\ 1710=1786.65n \\ \text{Divide both sides by 1786.65} \\ \frac{1710}{1786.65}=\frac{1786.65n}{1786.65} \\ n=0.9571\text{ mol} \\ To\text{ one decimal place,} \\ n=1.0\text{ mol} \end{gathered}\)The number of moles of the gas sample is 1.0 mol.
How many moles of sulfuric acid (H2SO4) are needed to react completely with 6.8 moles of lithium hydroxide (LiOH)? (4 points) 2LiOH + H2SO4 → Li2SO4 + 2H2O
Answer:
3.4 mol H2SO4
Explanation:
Took the test
Where is the energy found in sugar molecules?
Answer:
it is stored in the covalent bonds between the atoms
Explanation:
Are babies producers or consumers or none? What about rocks? Are they producers or consumers?
Answer:
ummm according 2 me babies are consumers and rocks are also consumers
if an atom of c14 undergoes radioactive decay during which a neutron is converted into a proton, (which stays in the atomic nucleus) what atom is produced?
When an atom of carbon-14 (C-14) undergoes radioactive decay in which a neutron is converted into a proton, the resulting atom produced is nitrogen-14 (N-14).
Carbon-14 is an isotope of carbon that contains 6 protons and 8 neutrons in its nucleus. During radioactive decay, one of the neutrons in the C-14 nucleus is converted into a proton. Since the number of protons determines the identity of the element, the resulting atom will have 7 protons. Therefore, it becomes nitrogen-14, which has an atomic number of 7 and 7 neutrons in its nucleus.
The process of converting a neutron into a proton is known as beta decay, which is a common type of radioactive decay observed in isotopes. This conversion leads to a change in the atomic number of the nucleus, resulting in the formation of a different element.
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Which of the following could be the rate equation for a first order reaction? please help this is timed
Rate = k[A] = first order reaction
Further explanationGiven
Rate law
Required
A first-order reaction
Solution
The rate law : equation for the rate of chemical reaction
For reaction
aA + bB ⇒ C
The rate : r = k[A]ᵃ[B]ᵇ
The sum of exponents(a+b) is the reaction order
From the choice :
a. a+b = 2, second order reaction
b. a+b = 3, third order reaction
c. a+b = 4, fourth order reaction
d a+0 = 1, first order reaction
A chemistry needs 25.0 mL of a liquid compound.
a) What mass of the compound is necessary if the density is 0.718 g/cm³?
b) If the compound costs $1.75/gram, what is the cost of this amount of the compound?
a) 25.0 mL of the compound has a mass of 17.95 g.
b) The cost of this amount of the compound is $31.43 ($1.75 x 17.95 g).
7. Calculate the percent composition of ZnSO4.
% composition = Ar/Mr x 100%
MM (molar mass) ZnSO₄ = 161 g/mol
AM (atomic mass) Zn = 65.38 g/mol
% Zn = 65.38/161 x 100% = 40.6%
AM (atomic mass) S = 32 g/mol
% Zn = 32/161 x 100% = 19.9%
AM (atomic mass) O = 16 g/mol
% Zn = 4.16/161 x 100% = 39.6%
a model of an atom shows eight electrons in rings that represent different energy levels. how many electrons are in each energy level?(1 point)
Eight electrons are shown in rings that correspond to distinct energy levels in a representation of an atom, with two in the first energy level and six in the second.
In the region surrounding an atom's nucleus, called the electron cloud, electrons are found. The electron is just one example of a group of elementary particles that make up an atom. Electrons, like all elementary particles, can clash with other particles and can display wavelike qualities when they are diffracted.
The tiniest component of ordinary matter, an atom, makes up a chemical element. Neutral or ionised atoms make up every solid, liquid, gas, and plasma. Atoms typically have a diameter of 100 picometers or less.
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A sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. What is the mass of oxygen in the sample? g
The mass of oxygen is 128 g
Given that a sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. We are required to find the mass of oxygen in the sample.
Let us suppose that the number of moles of oxygen is x. Now, we know that the total number of moles of gas is 8 moles. Therefore, the number of moles of neon is (8 - x).
Molar mass of oxygen = 32 g/mol
We can calculate the mass of oxygen from the number of moles of oxygen and molar mass of oxygen as follows:
Number of moles of oxygen × Molar mass of oxygen = Mass of oxygenx × 32 = Mass of oxygen
Let us find the mass of oxygen:
Mass of neon = Total mass of gas – Mass of oxygen
226 – Mass of oxygen = Mass of neon
226 – Mass of oxygen = (8 – x) × 20
Simplifying the equation:
226 – Mass of oxygen = 160 – 20x + x
226 – Mass of oxygen = 160 – 19x
Mass of oxygen = 66 – 19x
The total number of moles of gas is 8 moles
Hence, Number of moles of oxygen + Number of moles of neon = Total number of moles of gasx + (8 - x) = 8⇒ 8 = 8Therefore, the value of x = 4
We can calculate the mass of oxygen as follows:
Number of moles of oxygen × Molar mass of oxygen = Mass of oxygen
4 × 32 = 128 g
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What is the direct function of the energy released
from the nuclear chain reaction in a nuclear power
plant?
O turning the blades of the turbine
O heating water to produce steam
O powering the condenser
O carrying electricity from the plant to
consumers
The direct function of the energy released from the nuclear chain reaction in a nuclear power plant is for heating water to produce steam.
Energy released in nuclear chain reaction
A chain reaction is type of reaction in which neutrons released in fission produce an additional fission in at least one further nucleus.
This type of reaction involves the release of energy. This energy or heat is used to make steam that spins a turbine to create electricity.
Thus, we can conclude that, the direct function of the energy released from the nuclear chain reaction in a nuclear power plant is for heating water to produce steam.
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How many grams of molecular chlorine will be required to completely react with 0.0223 moles of sodium iodide according to the following reaction?
2Nal + Cl2 ---> 2NaCl + I2
A. 1.57 104 grams
B. 3.16 grams
C. 0.0112 grams
D. 0.791 grams
The amount of chlorine will be 0.791 gram required to completely react with 0.0223 moles of sodium iodide .
The given chemical reaction is :
2Nal + \(Cl_{2}\) → 2NaCl + \(I_{2}\)
It is given that:
Amount of sodium iodide = 0.0223 mol.
Atomic mass of chlorine = 35.45 g.
The amount of chlorine can be calculated as:
0.0223mol. NaI × (1mol. Cl₂/2mol. NaI) × (35.45g/1mol. Cl2)
=0.791 grams
Therefore, the correct answer will be option (D).
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Chlorine has two naturally occurring isotopes, 35cl and 37cl. What is the mass number of each? how many protons, neutrons, and electrons are present in each?.
The mass number \(_{17} Cl^{35}\) is 35.
The mass number \(_{17} Cl^{37}\) is 37.
isotopes of \(_{17} Cl^{35}\) contains. and isotopes \(_{17} Cl^{37}\) contain.
protons=17 protons= 17
neutrons= 18 neutrons=20
electrons= 17 electrons=17
Define Isotopes
Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei) and position in the periodic table (and, therefore, belong to the same chemical element). However, isotopes have different nucleon numbers (mass numbers) because they have varying numbers of neutrons in their nuclei. All isotopes of a given element have nearly identical chemical properties but differ in terms of atomic mass and physical characteristics.
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Which two reactions are faster than the others?
A. Methane burns in air that contains oxygen.
B. Silver tarnishes in air that contains hydrogen sulfide.
O C. A steel ship rusts in ocean water.
U
D. Hydrogen gas and oxygen gas react explosively to form water.
Answer:
i think its Hydrogen gas and oxygen gas react explosively to form water. and . Methane burns in air that contains oxygen.
Explanation: Mine was a little bit different than yours please forgive me if I'm wrong I chose answers that was similar to mine
Methane burns in air that contains oxygen and Hydrogen gas and oxygen gas react explosively to form water. These two reactions are faster than the others.
What is methane ?Chemically speaking, methane has the formula CH4. The simplest alkane and the primary component of natural gas, it is a group-14 hydride. The amount of oxygen breathed from the air might be decreased by high methane levels. This may include headaches, facial flushes, slurred speech.
Unscented, colorless, and combustible, methane is a gas. It is mostly used as fuel to produce heat and light. It is also employed in the production of organic compounds. Methane is frequently found in landfills, marshes, septic tanks, sewers, and other places where natural materials decompose.
Suffocation can result from high methane concentrations in enclosed spaces because methane reduces the amount of oxygen in the air. Lack of oxygen can cause headaches, nausea, lightheadedness, and unconsciousness.
Thus, option A and D are correct.
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A chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.
The two starting substances, a colorless liquid with a strong smell and a white solid with no smell, had different repeating groups of atoms. They were then mixed together, and as a result of the reaction, two substances were produced.
One of the ending substances had the repeating group of atoms shown above on the right. The molecules in the colorless liquid consist of a carbon atom with three hydrogen atoms attached to it and a nitrogen atom with two hydrogen atoms attached to it. This repeating group of atoms is commonly referred to as an amine. The white solid, on the other hand, is a carboxylic acid that contains a carbon atom bonded to two oxygen atoms (one of which is double-bonded) and a hydroxyl group (OH). These two functional groups (carboxyl and hydroxyl) are known as the carboxylic acid functional group.The reaction between these two starting materials results in the formation of two new products.
One of the substances produced is a salt, which is a solid with a white color. The other is a water-soluble compound with a pungent odor. The formation of the salt and the water-soluble compound is the result of a reaction between the carboxylic acid and the amine. This reaction is commonly referred to as an acid-base reaction.In an acid-base reaction, a carboxylic acid and an amine react to form a salt and a water-soluble compound. The carboxylic acid gives off a hydrogen ion (H+) to the amine, which accepts the proton to form an ammonium ion. The ammonium ion is positively charged and is attracted to the negatively charged carboxylate ion, forming the salt. The water-soluble compound is produced as a result of the loss of a hydrogen ion from the ammonium ion.
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The structure of an amine is shown. A tetrahedral nitrogen atom with a hydrogen atom and a lone pair in the same plane, a CH3 group left of the N and behind the plane and a C H 2 C H 3 group left of the N and in front of the plane. Indicate whether the amine can exist as a pure enantiomer or not.
Yes, it can exist as a pure enantiomer as this is not optically active; there is no stereocenter in amine structure.
Option B and C are correct.
What characterizes an enantiomer?Enantiomers are compounds that are identically connected, mirror images of one another, but not identical to one another. An enantiomer is typically defined as one that cannot be superimposable on its mirror image.
How are enantiomers identified?The least complex method for distinguishing an enantiomer is to perceive that two particles are perfect representations of one another. Enantiomers must reflect one another. The particles in the picture above reflect over the strong line, which addresses a mirror plane.
Incomplete Question:
The structure of an amine is shown. A tetrahedral nitrogen atom with a hydrogen atom and a lone pair in the same plane, a CH₃ group left of the N and behind the plane and a C H₂ C H₃ group left of the N and in front of the plane. Indicate whether the amine can exist as a pure enantiomer or not.Indicate whether the amine can exist as a pure enantiomer or not.
A. No, it interconverts with its enantiomer.
B.Yes, it can exist as a pure enantiomer.
C.This is not optically active; there is no stereocenter
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