The number of moles occupied by a gas at 347.8 mL is 6.21 × 10-³moles.
How to calculate moles?The number of moles occupied by a gas can be calculated using the ideal gas equation formula as follows:
PV = nRT
Where;
P = pressureV = volume n = number of molesR = gas law constantT = temperatureAccording to this question, the following parameters are given:
P = 0.4369atmV = 0.3478LT = 25°C = 298K0.4369 × 0.3478 = n × 0.0821 × 298
0.1519 = 24.47n
n = 6.21 × 10-³moles
Therefore, 6.21 × 10-³moles is the number of moles of the gas.
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Which does not explain the frontier ethic?
A.
harmony with nature
B.
human control of nature
C.
unlimited resources
D.
no natural laws
Frontier ethics explains that nature has an unlimited supply of resources. So, humans can use natural materials limitlessly. These ethics are sometimes considered as human interference in the matter of natural resources and the environment. Harmony with nature is not possible if human will follow frontier ethics.
Human manages and controls the natural environment. Human consumption of resources in unlimited ways was also discussed in frontier ethics. Natural laws are not followed in frontier ethics. According to frontier ethics, human development and economic growth are the most important issues.
In short, human attitudes and behavior toward nature are not so good. Here, humans are not much concerned about environmental problems. They only value their needs and desires.
Therefore, the correct answer is (A).
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which of the following substances, if produced from the catabolism of an amino acid, would be glucogenic (in mammals)?
The substances Pyruvate and Oxaloacetat, would be glycogenic in mammals, if produced from the catabolism of an amino acid. Correct answer: numbers 2 and 4.
Pyruvate and oxaloacetate are the end products of the breakdown of certain amino acids (glucogenic amino acids) in the liver. These products can be converted into glucose, through a process known as gluconeogenesis. This process allows the body to maintain blood glucose levels even when dietary sources of glucose are not available.
What is the catabolism of an amino acid?Catabolism of an amino acid refers to the process of breaking down amino acid molecules into simpler molecules, such as:
AmmoniaCarbon dioxideWaterThis process releases energy that the body can use for other metabolic functions.
Which of the following substances, if produced from the catabolism of an amino acid, would be glucogenic (in mammals)?
1. Acetoacetate
2. Pyruvate
3. Acetyl-CoA
4. Oxaloacetate
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100 POINTS HELP WILL MARK BRAINLIEST
im not too sure but it should probably be B or D. if not sorry.
12-6 What are chemical symbols
Answer:
Chemical symbols are abbreviations that are used in chemistry to shorten names of chemical elements and chemical compounds.
In order for an ______________ rock
to be created, the rock must first
become _______________.
Answer: you didn't add much information, but I think it's: in order for a sedimentary rock to be created, the rock must first become sediment.
Explanation: sediment is basically small pieces of rock that have been eroded from their parent rock; and with immense heat and pressure, those pieces will form a sedimentary rock.
A 25-gram block of Aluminum has an initial temperature of 35 degrees Celcius. What will be the final temperature of the aluminum block with the addition of 503.38 Joules of heat?
The final temperature of aluminum is 57.37°C
Q=mcΔT
This means that the amount of energy produced is equal to the mass of the system multiplied by its change of temperature and multiplied by its specific heat
ΔT=(x−27.5) °C
503.38 = 25 × 0.9 × (x - 35)
(x - 35) = 503.3 / 25 × 0.9
x = 57.37°C
What is specific heat constant?
The specific heat capacity c [J/(kg K)] of tissue describes how much energy is required to change the temperature of 1 kg of tissue by 1 K (=1°C). For example, the lower specific heat capacity of fat compared to other soft tissue indicates, that fat requires less energy to obtain a certain temperature increase. If we multiply specific heat capacity by mass density (ρ·c [J/(m3 K)]), we obtain the energy required to raise the temperature of 1 m3 of tissue by 1 K (=1°C)—that is, a quantity equivalent to a volume-specific heat capacity
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Question
Gold crystallizes in a face-centered cubic structure with a unit cell edge length of 61.52 pm. What is the atomic radius of
gold based on this structure in picometers?
Report your answer with four significant figures.
• Recall that 1.000 pm = 1.000 x 10-¹2 m.
The atomic radius of the gold based on this structure in picometers ia given as: 21.7506
How to solve for the atomic radius of goldThe atomic radius is: The average or normal distance from the nucleus's center to the edge of the surrounding electron shells is what we mean when we talk about an element's atomic radius.
We have the effective number of gold atoms to be 4 in a given unit cell
Then the molar mass of gold is given as 197 g / mol
The relationship between the edge length and the atomic radius is defined mathematically as:
√2a = 4r
make r the subject of the formula
r = √2a / 4
From the question the value of a is given as unit cell edge length of 61.52 pm
We would put this in the formula such that we would have:
r = √2 * 61.52 /4
r = 87.0024 /4
r = 21.7506
The atomic radius is 21.7506
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100 POINTS HELP WILL GIVE BRAINLIEST
b. testing the hypothesis
what type of chemical reaction will Ca LiOH → make
Answer:
It is not possible to determine the type of chemical reaction that will occur when Ca LiOH → without additional information. The chemical formula Ca LiOH could represent a compound, but without knowing what reactants are present and what products are being formed, it is not possible to classify the reaction. Some possible reactions that could occur involving Ca LiOH include a synthesis reaction, where Ca LiOH is formed from its constituent elements, a decomposition reaction, where Ca LiOH breaks down into its constituent elements, or a substitution reaction, where one or more atoms in Ca LiOH are replaced by other atoms.
Explanation:
Within a plug flow reactor, 16.7 g of CO are mixed with 26.2 g of H2; the two produce methanol (CH3OH) according to the following scheme:
CO + 2H2 => CH3OH
Calculate the mass of methanol produced in grams.
According to the reaction, the one mole or 28 g of CO produces one mole or 32 g of methanol. Thus, 16.7 g will produce 19 g of methanol.
What is methanol?Methanol is an organic compound formed by the covalent bonding between carbon and oxygen. Methanol is the basic alcohol.
As per the balanced reaction CO be the limiting reactant. One mole of CO produces one mole of methanol.
molar mass of CO = 28 g/mol
molar mass of methanol = 32 g/mol
28 g of CO produces 32 g of methanol. Hence, mass of methanol produced by 16.7 g of CO is:
= (16.7g × 32 g) / 28 g.
= 19 g.
Therefore, the mass of methanol produced from 16.7 g will be 19 g.
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What does this image represent?
Linear molecule with one domain
Linear molecule with two domains
Tetrahedral molecule with four domains
Trigonal planar molecule with three domains
i need help! 100 points!!!! it better be right
The molecular geometry of the molecule shown in the image is trigonal planar with three domains.
What is molecular geometry?Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.
It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.
They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.
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Question 3:(answer in place of item 15)
The battery below is allowed to operate for 8 hours. At the end of this time the zinc strip is
visibly corroded and much smaller while the copper strip is shiny and thicker. Which way
(left-right or right-left) are electrons flowing.
Is the zinc being reduced or oxidized? How do you know?
In the given Galvanic cell, the electrons are flowing from left to right. The Zinc is oxidized into Zn²⁺ ions.
What is a Galvanic cell?A galvanic cell can be described as an electrochemical cell in which electricity is produced from spontaneous Oxidation-Reduction reactions. Galvanic cells exhibit spontaneous redox reactions but the energy generated from the said reaction.
A common apparatus of the galvanic cell consists of two different metals or electrodes such as Zinc and copper electrodes, each immersed in different beakers containing their respective ion solution. Therefore, the Zinc electrode is placed in ZnSO₄ solution and the copper electrode is placed in CuSO₄ solution.
On the left end, the zinc metal is oxidized into Zn²⁺ ions, and the electrons from the Zinc electrode travel to the copper electrode (right end). The cooper Cu²⁺ ions from the CuSO₄ solution accepts those electrons and deposit as copper metal on the copper electrode.
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PLEASE HELP FAST Question- Since metals prefer to give away electrons during chemical bonding, the most active metals are closest to francium, which is a large atom with low ionization energy and electronegativity. Nonmetals prefer to pull in electrons, so the most active nonmetals are closest to fluorine, which has a high ionization energy and electronegativity. The noble gasses (Group 18) are considered inactive since they already have a stable octet of electrons in their outer shell.
Referring to a periodic table, highlight the member of each pair of elements which is most chemically active.
Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity.
According to the periodic table the elements which are most active are Li and Na.
What is Ionic bonding?Ionic bonding occurs when valence electrons transfer completely between atoms. The metal atoms having low ionization energy, loses electrons and becomes positively charged.
The noble gasses (Group 18) are considered inactive since they already have a stable octet of electrons in their outer shell.
An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions.
Therefore, Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity.
According to the periodic table the elements which are most active are Li and Na.
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Balance the following reaction in acidic solution: Cr2O72−(aq) + HNO2(aq) ⎯→ Cr3+(aq) + NO3−(aq)
The balanced chemical equation in acidic solution is as follows: Cr₂O₇²−(aq) + 3 HNO₂(aq) ⎯→2 Cr₃+(aq) + 3 NO₃−(aq) + 4 H₂O(l).
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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which of the following electronic transitions in the hydrogen atom would result is the release of a photon with the longest wavelength?
Higher the value of the principle quantum number to which electron is jumping, longer will be the wavelength. So, n = 6, p = 8 transition produces longest wavelength.
What is Wavelength?
A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles.The wavelength is most frequently described in nanometers (nm), which are units of 10-9 m, or angstroms (), which are units of 10-10 m, for infrared (IR), visible light (UV), and gamma radiation ().
Frequency, which is defined as the quantity of wave cycles per second, and wavelength have an inverse relationship.
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Which air mass contains cold, dry air?
Answer:
The answer to your question is ⇔ arctic air mass
Explanation:
I hope this helps and have a wonderful day!
what volume of I2 gas forms when 21 L Cl2 reacts at STP
At STP, the volume of one mole of any gas is 22.4 L. As per the given reaction, one mole or 22.4 L of Cl₂ gas gives one mole or 22.4 L of I₂ gas. Thus, 21 L of Cl₂ gives 21 L of I₂ gas.
What is molar volume?The volume occupied by one mole of a substance is called its molar volume. At standard temperature and pressure condition (STP), one mole of every substance contains 22.4 L .
One mole of Cl₂ gas at STP contains 22.4 L similarly one mole of I₂ contains 22.4 L. As per the reaction, one mole of Cl₂ give one mole of l₂. Thus, both are having equal volumes in this reaction.
Therefore, 21 L Cl₂ reacts to give 21 L l₂ at STP .
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Answer: 21 L i2 at STP
Explanation:
One mole of Cl₂ gas at STP contains 22.4 L similarly one mole of I₂ contains 22.4 L. As per the reaction, one mole of Cl₂ give one mole of l₂. Thus, both are having equal volumes in this reaction.
Therefore, 21 L Cl₂ reacts to give 21 L l₂ at STP .
assign the protons in the nmr spectrum below. for each peak, list the peak location in ppm, and the protons responsible for it (labeled a-e in the structure). isoamyl acettate
List the peak location in ppm, and the protons responsible for it labeled a-e in the structure is banana oil.
What is ppm ?
Reduction, which involves the exchange of electrons between species, is the process of gaining electrons or reducing an element's oxidation state in a chemical reaction. When the chemical reaction known as reduction occurs, the number of electrons that are bound to a single atom or a group of related atoms rises.
What is protons ?
Positively charged subatomic particles called protons fall into this category. The strong nuclear force is responsible for the protons' interconnection in an atom's nucleus. Subatomic particles without charge include neutrons (they are neutral).
Therefore, list the peak location in ppm, and the protons responsible for it labeled a-e in the structure is banana oil.
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the following chemical reaction occurs in a single step. fill in the rate law for this reaction. a 2b --> ab2
According to the given statement the rate law for this reaction. A+2B→AB2 is =k[A][B]
How do chemical reactions occur?A chemical reaction is a process that permits one group of chemical components to change chemically into another.Chemical reactions, which can frequently be defined by a chemical equation, traditionally include changes that only affect the locations of electron in the formation and dissolution of chemical bonds among atoms, with no changes to the nucleus (no change to the components contained).
What are the five basic chemical reactions?Combination or synthesis, decomposition, single displacement, double displacement, and combustion are the five different types of generic chemical reactions.
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which of the following allows for atp to be produced with the electron transport chain? answer acetyl-coa oh- concentration gradient h concentration gradient nad i don't know yet
The Krebs cycle produces molecules necessary for function of the electron transport chain.
What is electron transport chain ?
The oxidative phosphorylation process, also known as oxidative phosphorylation, is a comprehensive system that produces ATP by coupling redox processes through a sequence of four protein complexes known as the electron transport chain. Cellular respiration and photosynthesis both involve it in mitochondria.
What is Krebs cycle?
The Krebs cycle, also known as the TCA cycle or the citric acid cycle, is a sequence of enzyme-catalyzed processes taking place in the mitochondrial matrix where acetyl-CoA is oxidized to produce carbon dioxide and coenzymes are reduced to produce ATP in the electron transport chain.
Therefore, the Krebs cycle produces molecules necessary for function of the electron transport chain.
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Explain why apple trees bloom in the spring but not in the summer.
Answer:
Apple trees bloom in the spring because they require a certain amount of cold weather, known as chill hours, in order to break dormancy and produce flowers. In most regions where apple trees grow, the temperatures during the springtime provide the ideal conditions for the trees to bloom. During the summer, apple trees are focused on growing and ripening their fruit, rather than producing flowers. In some cases, apple trees may produce a small number of flowers during the summer, but this is not the norm. The exact amount of chill hours that apple trees need can vary depending on the specific variety of apple tree, as well as the region where it is grown.
Explanation:
Answer:
Drought may trigger out-of-season blooming
Many trees and shrubs that flower in early spring, like apples and lilacs, form their buds during the preceding summer. When spring breaks the plant's dormancy, the buds burst open and bloom.
the normal boiling point of liquid methanol is 338 k. assuming that its molar heat of vaporization is constant at 36.6 kj/mol, the boiling point of ch3oh when the external pressure is 1.29 atm is
The Boiling point is 345.36 K at 1.332 atm.
What is boiling point?
Organic compounds' boiling points will reveal important information about their structural and physical characteristics. The boiling point of a substance aids in its identification and characterization. A liquid's boiling point is higher under higher atmospheric pressure than it is under lower atmospheric pressure.
What is vaporization ?
The process of converting a substance from its liquid or solid state into its gaseous (vapour) state is known as vaporization. Boiling is the process of vaporizing a liquid when the environment permits the development of vapor bubbles inside the liquid.
Relationship is between vapor pressure and boiling point and ΔHvap is given by clauses clampy ton.
ln ( p₂/p₁)- ΔHvap/ R ( 1/ l₂- 1/ T₁)
Now given,
normal boiling point means pressure is 1 atm
P₁= 1atm, T₁= 328k
p₂= 1,32 atm, T₂= ?
ΔHvap= 36.6KJ/ Mol = 36600J/Mol
ln= (1.32/1) = - 36600J/mol/ 8.314 J/Mol.K (1/T₂- 1/338K)
= 1/T₂- 1/338K = - 6.30664*10⁻⁵ K⁻¹
= 1/T₂ = 2.8955*10⁻³ K⁻¹
T₂= 345.36 K
Therefore, Boiling point is 345.36 K at 1.332 atm.
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the grignard reagent needed to accomplish the reaction below is , and you would need 2 equivalents to synthesize the target product.
Butyryl chloride reacts with Grignard reagent, methyl magnesium bromide, to form pentan-2-one. Pentan-2-one reacts with vinyl magnesium bromide to form the final product 3-methylhex-1-en-3-ol.
Explanation-The following diagram illustrates how butyryl chloride becomes 3-methylhex-1-en-3-ol. conversion of 3-methylhex-1-en-3-ol from butyryl chloride. Tertiary alcohols are produced when carboxylic esters, R'CO2R, combine with two equivalents of an organolithium or Grignard reagent. Two identical alkyl groups are present in the tertiary alcohol (see R) A ketone intermediate is used to carry out the reaction, which is subsequently used to react with the second equivalent of the organometallic reagent. As we've just seen, the ketone undergoes further reactions to create a tertiary alcohol. This explains why, when reacting with esters, two equivalents of Grignard are required. a mechanism The Grignard performs an addition reaction on the ester in the first step, resulting in the formation of C-C and the breakdown of C-O (pi), giving us an intermediate with a negatively charged oxygen.
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Which star is farthest from the end of its lifecycle? (Science)
Answer:
White dwarf.
Explanation:
its the most furthest.
a chemical equation is a notation in which chemical formulas express the identities and their coefficients express the quantities of substances involved in a chemical reaction.
Chemical equation is a representation of a reaction that brings in chemical changeschanges. It is represented in word form and in symbols.
What is a chemical equation?
Chemical equations use symbols to represent factors such as the direction of a reaction and the physical states of the reacting entities. Chemical equations were first formulated by the French chemist Jean Beguin in 1615.Chemical reactions can be represented on paper using chemical equations, an example of which is shown below (for the reaction between hydrogen gas and oxygen gas to form water).In the above example, it can be observed that the reacting entities are written on the left-hand side, while the products that form from chemical reactions are written on the right-hand side of the chemical equation.To know more about chemical equations, click the link given below:
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the empirical formula and molar mass of several compounds are listed. find the molecular formula of each compound. a. c6h7n, 186.24 g>mol
The molecular formula of C₆H₇N is C₁₂H₁₄N₂; C₂HCl is C₆H₃Cl₃; C₅H₁₀NS₂ is C₁₀H₂₀N₂S₄
The molecular formula can be calculated from the empirical formula and molar mass as follows:
C₆H₇Nfirst we know that the number of moles = subscript
So,
C has 6 moles
H has 7 moles
N has 1 mole
then we can Multiply moles by atomic mass to find molecular weight
therefore,
C = 6 × 12 =72
H =7 × 1 = 7
N = 1 × 14 = 14
to get the empirical weight we calculate by adding molecular weight
C+H+N = 72+7+14= 93
we know that molecular formula is (empirical formula )n
so we should find n by Divide molar mass by the empirical weight
186.24 ÷ 93 = 2
so molecular formula of C₆H₇N is (C₆H₇N)2 = C₁₂H₁₄N₂
C₂HClfirst we know that the number of moles = subscript
So,
C has 2 moles
H has 1 moles
Cl has 1 mole
then we can Multiply moles by molar mass to find molecular weight
therefore,
C = 2 × 12 = 24
H = 1 × 1 = 1
Cl = 1 × 35.5 = 35.5
to get the empirical weight we calculate by adding molecular weight
C+H+Cl = 24+1+35.5 = 60.5
we know that molecular formula is (empirical formula )n
so we should find n by Divide molar mass by the empirical weight
181.44 ÷ 60.5 = 3
so molecular formula of C₂HCl is (C₂HCl)3 = C₆H₃Cl₃
C₅H₁₀NS₂first we know that the number of moles = subscript
So,
C has 5 moles
H has 10 moles
N has 1 mole
S has 2 moles
then we can Multiply moles by atomic mass to find molecular weight
therefore,
C = 5 × 12 = 60
H = 10 × 1 = 10
N = 1 × 14 = 14
S = 2 × 32 =64
to get the empirical weight we calculate by adding molecular weight
C+H+N +S = 60+10+14 +64 = 148
we know that molecular formula is (empirical formula )n
so we should find n by Divide molar mass by the empirical weight
296.54 ÷ 148 = 2
so molecular formula of C₅H₁₀NS₂ is (C₅H₁₀NS₂)2 = C₁₀H₂₀N₂S₄
Your question is incomplete but most probably your full question was
From the given empirical formula and molar mass, find the molecular formula of each compound. C₆H₇N, 186.24 g/mol C₂HCl, 181.44 g/mol C₅H₁₀NS₂,296.54 g/mol
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What is the formula mass of iron(II) chloride? 101.55
126.75
O 147.17
165.10
175.70
Answer:
The formula mass of iron(II) chloride is 162.21 g/mol.
All alkali metals react with water to produce hydrogen gas and the corresponding alkali metal hydroxide. A typical reaction is that between lithium and water: 2Li(s) + 2H2O(1) 2LiOH(aq) + H2(g) How many grams of Li are needed to produce 9.89 g of H₂ ?
Answer:
69.23g
Explanation:
Find out how many moles is in 9.89g of H2.
number of moles = mass(g) / molar mass
1 is the molar mass of hydrogen (to the nearest whole)
relative molecular mass of H2: 2*1 = 2
number of moles of H2 = 9.89/2 = 4.945
1 mol of H2 is produced from 2 mol of Li
so
4.945 mol of H2 produces 9.89 mol of Li
mass(g) = number of moles * molar mass
7 is the molar mass of Lithium (to the nearest whole)
mass = 9.89 * 7 = 69.23
69.23 grams of Li are needed to produce 9.89 of H2
How much is 3040mmHg in atm? round to the nearest whole number
Type your answer...
3040mmHg pressure is nearly equal to 4 atm.
What is ATM pressure?Atmospheric pressure (atm) is a unit of measurement equal to the mean atmospheric pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). Atmospheric pressure is most often approximated by the hydrostatic pressure caused by the weight of the air above the point of measurement. Air pressure decreases with altitude because as altitude increases, the air above has less mass. Since the atmosphere is thin relative to the Earth's radius (especially in the dense atmospheric layers at low altitudes), the Earth's gravitational acceleration as a function of altitude can be approximated as constant and contributes little to this decline. Pressure is measured as force per unit area in SI units Pascal (1 Pascal = 1 Newton per square meter, 1 N/m²). Atmospheric pressure at sea level is 760 cm Hg.
Given,
3040mmHg pressure
1 mmHg = 0.00131579 atm
3040mmHg = 3040 × 0.00131579 atm
3040mmHg = 4.0000016 atm
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Question 6
How many moles is equal to 58.24 grams of fluorine gas (F₂)?
Answer: 3.0655207907157433
Explanation: