Niobium has an atomic mass of 92.90638 u. An atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 grammes.
What does the term "atomic" refer to?
Atomic is derived from the Greek word atomos, which means "uncut" or "indivisible," and means "indivisible particle" in Latin. atomic is defined as an adjective that refers to, contains, or is related to atoms.
What does atomic energy entail?
Nuclear energy, also known as atomic energy, is the considerable quantity of energy released in operations that have an impact on atomic nuclei, or dense centres of atoms. It differs from other atomic phenomena' energy, which solely involves an atom's orbital electrons in regular chemical reactions, for example.
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Answer:
1 mole of Nb = 92.906 grams
Metal. Specific heat
Aluminum 0.903
Copper 0.385
Gold 0.128
Silver 0.235
If identical quantities of heat are allowed to flow into 50.0-g samples of each of the metals, all at the same initial temperature, which of the following metals will
reach the highest temperature?
A Aluminum.
B Copper.
C Gold.
D Silver.
1) Calculate the % Error when the Experimental value is 5.5 grams and the
Accepted value is 5.0 grams.
Copper is mostly utilized in generators, house and auto wiring, as well as the cables in gadgets like radios, TVs, computers, lighting, and motors due to its flexibility and good conductivity.
What led to General Motors' demise?The expenses of legacy health care and company pensions were also fixed. Therefore, many costs remained largely same as revenues declined. This resulted in losses. Due to the mounting losses and the weakening economy, GM was no longer able to operate as a profitable company.
Who currently owns General Motors?Who is the GM Company's owner? Stockholders, 12.56% General Motors Co. insiders, plus 7.47% retail investors collectively own 79.97% of General Motors Co. (NYSE: GM). The largest individual Ford Motor Co. fund is Retired person Medical Benefits Trust UAW.
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Homework: Anticipation Guide
Anticipation Guide
Note: If you do not have access to Amplify Science at home, your teacher will provide you with an alternate way to complete this homework.
For each statement, indicate whether you agree or disagree.
Don’t worry about being right or wrong. This is your chance to think about what you already know about light. As you learn more during the unit, you will return to this guide to revise and explain your answers.
Light causes the same change to all materials.
All light is the same, whether it comes from the sun, a light bulb, or anywhere else.
All light can be seen.
Light can travel through materials that you cannot see through, like wood or aluminum foil.
Choose the statement you are most sure about. It can be a statement that you agree or disagree with.
Why do you agree or disagree with the statement you chose? Explain your thinking.
Among all the given options, the correct option is option A that is Light causes the same change to all materials. there are so many phenomenon that is attached to light.
What is light?Electromagnetic radiation that is visible to the human eye is referred to as light rays. The wavelengths of low energy radio waves, which are measured in meters, and high energy gamma rays, which have wavelengths smaller than 1x10-11 meters, are all included in the electromagnetic spectrum in its entirety.
The lowest unit of energy that is capable of moved is a photon, as well as the discovery because light can move in discrete quanta gave rise to quantum theory.
Therefore, the correct option is option A.
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Causes of carbon monoxide poisoning
Car as well as truck engines emit fumes (smoke) that contain carbon monoxide. tinier gasoline engines Fu el burning space warmers (not electric).
The inhalation of combustion gases might result in carbon monoxide pois oning. Your body substitutes carbon monoxide for the oxygen in human red blood cells whenever you have too enough carbon monoxide in the air you are breathing. Due to this, oxygen cannot reach your bo dy's tiss ues as well as org ans.
The majority of CO- poiso ning deaths are due to fires, although about one-third are also brought on by stoves, portable heaters, as well as car exhaust. These are frequently linked to exhaust system problems or obstructions, as well as suic ide attempts.
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structure of benzophenone
The chemical molecule (C6H5)2CO, also referred to as Ph2CO, is benzophenone. The solid is white and dissolves in organic solvents.
Why does benzophenone appear in sunscreen?Some flowering plants contain benzophenone-3 (BP-3), a substance that occurs naturally. The sun's dangerous ultraviolet (UV) rays are absorbed and scattered by BP-3. It is created to be used as sunblock in lotions, shampoos, and cosmetics for this reason.
Benzophenone's toxicity levelOrgan System Toxicology Because that including can cause liver enlargement in rats at lower doses, it (Environmental protection agency) lists it as a recognized toxicant. Oxybenzone can penetrate the skin, build up in the blood, kidneys, and liver, and could be harmful to liver cells.
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The correct answer is
what is the structure of benzophenone ?
The element is:
The number 6 refers to the number of:
The numbers 12, 13, and 14 refer to the:
How many neutrons are in the first isotope?
How many neutrons are in the second isotope?
I
C&C C
How many neutrons are in the third isotope?
Answer:
The number 6 refers to the atomic number c. The numbers 12, 13, and 14 refer to the atomic mass d.
Explanation:
In this structure 6 represents atomic number that is the number of electrons or the number of protons and 13 represents the mass number (A). The number of neutrons (N) = mass number (A) − no. of electron or no. of proton. Hence N=13−6=7.
Was this answer helpful? or
Answer:
The number 6 refers to the atomic number c. The numbers 12, 13, and 14 refer to the atomic mass d.
Explanation:
is it true that Kelp and plants can break down starch into sugar and use it to grow and release in the process only when it is dark?
Answer:
Yes it's true ooooooooo
Calculate the formal charge of the central N. Enter the formal charge, including the magnitude and sign. View Available Hint(s) Submit Previous Answers X Incorrect; Try Again; 19 attempts remaining Make sure that you determined the number of valence ele of the element in the periodic table. An element will only he "owns" (all of its nonbonding electrons and one-half of its You may want to review Hint 1. Determine the number of v Part B Calculate the formal charge of the leftmost N. Enter the formal charge, including the magnitude and sign. View Available Hint(s) Consider the following molecule: -N=N-õ:
Actual voltages on a molecule's atoms are represented by formal charges.The most likely Preliminary design for a given chemical can be found using the formal charge.
What does a formal charge mean?A formal charge is the charge that is given to an atom in a molecule on the assumption that all chemical linkages involve an equal sharing of electrons between the two atoms without consideration of relative electronegativity. Following is the formula for determining an atom's formal charge in a Lewis structure:
What does "formal" in conversation mean?Colloquialisms, contractions, and first-person pronouns like "I" or "We" are not used in formal language. Informal speech is more relaxed and unplanned. When speaking with family or friends, it is utilized.
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how many atoms of oxygen are in 1.50 moles of aluminum oxide?
PLS HELP MULTIPLE CHOICE!!!
no links pls!
Refer to the following unbalanced equation: C6H₁4 + O₂ →→ CO₂ + H₂O What mass of oxygen (O₂) is required to react completely with 21.5 g of C6H₁4?
37.9 g
6.54 × 10³ g
75.8 g 7.98 g
0.250 g
Oxygen Consider the following improper equation: O2 → CO2 + Oxygen ( o2 + C6H14 How much carbon dioxide (CO2) could be created by combining 11.2 g of C6H14 with 37.9 g of extra oxygen.
What controls the direction that this chemical reaction, CO2 h2o H2CO3 H+ HCO3, takes?Carbonic acid, or H2CO3, is created when CO2 and water combine. This acid is in mixture with co2 (HCO3-) and h+ (H+). The following phase of the reaction is influenced by changes in the concentrations of reactants on either of the equation's sides.
How are CO2 emissions determined?Billion British thermal unit (MMBtu) are converted to therms, and then the carbon coefficient, the fraction oxidized, and the proportion of the molecular mass of atmospheric co2 to carbon are multiplied to get the greenhouse gas emissions per therm.
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How many molecules of carbon dioxide are released during one turn of the citric acid cycle?
a. 2
b. 3
c. 4
d. 6
The answer is Two molecules of carbon dioxide are released during one turn of the citric acid cycle.
Two carbons - from acetyl CoA-enter the citric acid cycle in each turn, and two carbon dioxide molecules are released. However, the carbon dioxide molecules don't actually contain carbon atoms from the acetyl CoA that just entered the cycle.
Instead, the carbons from acetyl CoA are initially incorporated into the intermediates of the cycle and are released as carbon dioxide only during later turns. After enough turns, all the carbon atoms from the acetyl group of acetyl CoA will be released as carbon dioxide.
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The process that takes place when liquid changes to a gas (a type of vaporization that occurs below the boiling point.)
Answer:
Evaporation
Explanation:
Evaporation is the process by which a liquid changes to a gas below the boiling point of the liquid.
Why is methane, CHA, a nonpolar compound?
It can be inferred that due to the relatively slight difference in electronegativity between carbon and hydrogen, and because of its symmetrical tetrahedral shape, methane CH4 is a nonpolar molecule.
What is Methane?Methane is a colorless, odorless gas that occurs naturally in large quantities and is also a byproduct of some human activities. Methane is the most basic hydrocarbon in the paraffin family and one of the most potent greenhouse gases. It has the molecular formula CH4.
Methane is the second most prevalent anthropogenic GHG after CO2, accounting for approximately 20% of world emissions. Compared to carbon dioxide, methane traps heat in the atmosphere 25 times more effectively.
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Boron has two naturally occurring isotopes. In a sample of boron, 30% of the atoms are B-10, which is an isotope of boron with 5 neutrons and a mass of 10 AMU. The other 70% of the atoms are B-11, which is an isotope of boron with 6 neutrons and a mass of 11 AMU. What is the atomic mass of boron?
The average atomic mass of boron is derived from the isotopic masses and percentage abundance. The average atomic mass of boron is 10.7 amu.
What are isotopes?Isotopes are atoms of same element with different atomic mass numbers. Almost all elements have two or more isotopes but not all of them are stable in nature.
The average atomic mass can be calculated from the isotopic mass and and percentage abundance as follows:
atomic mass = ∑ (isotopic mass × %abundance /100 )
Apply the isotopic mass and abundance of all isotopes given as follows:
atomic mass of neon = (30/100 × 10 amu) + (70/100 × 11 amu) = 10.7 amu
Therefore, the atomic mass of boron is 10.7 amu.
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Share your thoughts on the genetic modification of crops and food for the purpose of disease treatment in humans. Example: genetically inserting medicine into food to prevent diseases, the way current vaccines work.
Genetic modification of crops and food have both advantages and disadvantages. These techniques create desired characteristics in crops but latter that might affect our health as well.
What is genetic modification ?Plants and animals can be genetically modified to create desired characteristics in them. Gene techniques such as CRISPER are nowadays becoming popular in agricultural field.
Features such as rapid growth, extra production, coloring, change in size, antibacterial properties, climate survival etc. can be imparted to plants by genetic engineering.
However, genetically modified crops make some health issues some times. It has been reported that, some genetically modified vegetables causes sever health impacts.
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Which of these is an
example of a chemical
property?
A. Potassium.ignites when placed in water.
B. Sodium metal is soft and malleable.
C. Aluminum is a shiny, silver color.
D. Iron melts at 1,535 °C.
Answer:
B
Explanation:
I know but I can't answer well. We might to choose the best answer so the answer is possible to be B.
If a car takes 5 seconds to increase its speed from 2 m/s (4.5 mph) to 18 m/s (40 mph, what is its acceleration in m/s2?
please show work
If a car takes 5 seconds to increase its speed from 2 m/s (4.5 mph) to 18 m/s (40 mph), then its acceleration in m/[tex]{s}^2[/tex] is 16 m/[tex]{s}^2[/tex], as it is found by subtracting the final velocity from the initial and dividing by the time.
What is acceleration, and what is its importance in cars?It explains how the velocity of a car changes over time and can be calculated by subtracting the final velocity from the initial and dividing by the time; the calculation is given below.
acceleration (a) = (final velocity - initial velocity) / time
a= 18 m/s - 2 m/s / 5 sec
a=16 m/[tex]{s}^2[/tex]
Hence, if a car takes 5 seconds to increase its speed from 2 m/s (4.5 mph) to 18 m/s (40 mph), then its acceleration in m/[tex]{s}^2[/tex] is 16 m/[tex]{s}^2[/tex], as it is found by subtracting the final velocity from the initial and dividing by the time.
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Zn will replace the metal in the ionic compound LiF : true or false
Zn will replace the metal in the ionic compound LiF . false
What is metal ?
Metal is a hard material composed of a variety of elements, such as iron, aluminum, nickel, zinc, copper, lead, tin, and others. Metals are malleable, ductile, and generally have high electrical and thermal conductivity.
Metals can be polished to a shine and are often used in a variety of applications such as jewelry, construction, manufacturing, and many more. Metals are also used in many industries including automotive, aerospace, and medical. Metal is a durable and versatile material that is used for a variety of applications, from industrial to decorative.
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A chemist must dilute 78.3 mL of 249. mM aqueous potassium dichromate (K₂Cr₂O₂) solution until the concentration falls to 187. mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters.
Dilution is being carried out by the chemist. The solution's volume may be MiVi=MfVf at the end. To make 78.3 mL from 249 mM aqueous chemist would dilute it. water-soluble potassium dichromate
What is aqueous?Liquid water is the solvent in an aqueous solution. Solute (dissolved) protons and molecules are encircled by molecules of water and absorbed into the web of bonds in the water, in other words.
Does aqueous refer to water?The word aqueous, which derives from the Latin word aqua, denotes being or consisting of water. Water is a common solvent in chemistry since it works great as a solvent as well as being readily available.
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Please help Chemistry
5.0 mol Al reacts with 6.0 mol O2 to
form Al2O3.
4AI + 302 → 2Al2O3
How many moles of Al2O3 form
when all 5.0 moles of Al are used up?
[ ? ] mol Al2O3
Round your answer to the tenths place.
The amount of the aluminum oxide that is formed is 2.5 moles.
What is the number of moles formed?We must have it at the back of our minds that in the case of the questions that involves stoichiometry, the limiting reactant can be said to be the compound that is used up in the reaction.
We are told here that the substance that has been used up in this reaction is the aluminum then it means that this must be the limiting reactant here.
If 4 moles of aluminum produces 2 moles of aluminum oxide
5 moles of aluminum would produce 5 * 2/4
= 2.5 moles of aluminum oxide.
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Light through water is what type of energy ? Refraction reflection or diffusion?
Answer:
refaction reflection
Explanation:
i think that is what it is called
Explanation:
When light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction. When light enters a more dense substance (higher refractive index), it ‘bends’ more towards the normal line. But Reflection occurs when light traveling through one material bounces off a different material. The reflected light continues to travel in a straight line, but in a different direction.
Hope it Helps!
Which is an effect of La Niña on North Carolina’s summer weather?
La Niña typically brings cooler than normal summer weathers temperature to North Carolina. It can also bring more frequent and intense storms to the region.
What is weather?
Weather is the state of the atmosphere at any given time, including temperature, air pressure, humidity, precipitation, cloudiness, and wind. It is the sum of all atmospheric conditions in a given area over a short period of time. Weather is responsible for the daily changes in the atmosphere, such as storms, droughts, and floods. Weather is affected by seasonal and geographical factors, such as latitude, altitude, and proximity to water sources. Weather provides information about the environment, such as visibility, air quality, and the presence of pollutants. Weather can also influence the spread of disease and natural disasters, as well as the growth of plants and animals.
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PLEASE ANSWER WITH A CORRECT ANSWER
Answer: Solar Energy Chemical Energy
Explanation:
Draw the structure of 5-tert-butyl-2-methyl-3-octyne.
The structure is attached with the answer. 5-tert-butyl-2-methyl-3-octyne is a hydrocarbon molecule with a chain of 14 carbon atoms, so it is an alkyne.
At the beginning of the chain is a triple bond, which is the characteristic feature of an alkyne. The chain also contains two methyl and one tert-butyl group. The methyl group is attached to the second carbon atom in the chain, while the tert-butyl group is attached to the fifth carbon atom in the chain.
This molecule has a total of 20 hydrogen atoms, with three hydrogen atoms attached to each of the carbon atoms in the chain. 5-tert-butyl-2-methyl-3-octyne is a relatively reactive molecule because of its triple bond. This molecule can undergo a variety of reactions, including addition reactions, oxidation reactions, and substitution reactions. The reactivity of this molecule makes it a useful chemical in a variety of industrial and laboratory applications.
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Use this graphic to explain how matter is conserved in a nuclear reaction
Nuclear processes alter the sorts of atoms present, but chemical reactions do not. The electrons in the atom play a significant role in chemical reactions when nucleus reactions occur in atom nuclei.
What is nuclear explain?The energy found in an atom's nucleus, or core, is known as nuclear energy. Energy maintains the nucleus of atoms together, the minuscule units that make up all matter in the universe. The dense nucleus of an atom has an enormous quantity of energy.
Why is a nuclear threat a threat?The most lethal weapons on earth are nuclear weapons. One can wipe out an entire metropolis, perhaps killing millions of people, endangering the ecosystem and the lives of future generations due to its long-term devastating impacts.
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13. What would be the boiling point in degrees celcius of the solution in number 12?
(Kb of water is 0-.512 °C/m)
The boiling point of the solution in number 12 would be 100.624 °C.
How do we determine the value?The boiling point of a solution depends on many factors, including the concentration of the solute and the nature of the solvent. The value you provided (Kb of water = 0.512 °C/m) is the molal boiling point elevation constant, which is used to calculate the change in boiling point of a solvent when a solute is added. Using the molar boiling point to multiply the number ascribed to the degree Celsius of the solution which is 12 plus the boiling point of water. which is 100..
Therefore, the correct answer is as given above
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Please help, will give brainiest
QUESTION 1.
Element X on Planet Qatar has three known isotopes: X-121 with a relative abundance of 43.2%, X-123 with a relative abundance of 53.1%, and X-129 with a relative abundance of 3.70%. What is the average atomic mass in amu of Element X given this information?
QUESTION 2.
How did Rutherford's experiment change the way scientists had previously viewed atomic structure? How did this pave the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model?
QUESTION 3.
How is percent abundance related to average atomic mass?
Answer 1
The average atomic mass in a.m.u of Element X given this information is 122.358.
Answer 2
Rutherford's experiment change the way scientists had previously viewed atomic structure as it provided insight into atomic structure.
Rutherford's experiment paved the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model as his model of the atom, the structure of the nucleus became more well-defined following the discovery of protons (1919) and neutrons (1932) as the particle constituents of the nucleus.
Answer 3
The percent abundance is related to the number fraction as fi = Pi/100 and used as in the formula written above in order to find average mass
What is atomic structure?Atomic structure refers to the structure of an atom comprising a nucleus (centre) in which the protons (positively charged) and neutrons (neutral) are present.
The average atomic mass in a.m.u of Element X given this information is ((121 * 43.2) + (123 * 53.1) + (129 * 3.70)) / 100
=5227.2 + 6531.3 + 477.3
=12235.8 / 100
122.358
Rutherford's experiment change the way scientists had previously viewed atomic structure as it provided insight into atomic structure, and Rutherford's model of the atom was proposed as a small, positive, massive nucleus contains the very vast majority of the mass of the entire atom with negatively charged electrons surrounding it at relatively large distances.
Rutherford's experiment paved the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model as his model of the atom, the structure of the nucleus became more well-defined following the discovery of protons in 1919 and neutrons in 1932 as the particle constituents of the nucleus.
It was during the 1920s that a "wave mechanical model" came along through the work of several physicists most importantly de Broglie, Heisenberg, and Schrodinger) and Bohr's concept of electrons "orbiting" the nucleus was abandoned in favor of "orbitals" which are more abstract probabilistic representations of electronic structure within an atom.
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How many grams of BE(NO2)2 are needed to make 550 mi of a 2.5 m solution?
The mass of Be(NO₂)₂ required to make 550 mL of a 2.5 M solution is 126.25 g.
What is the molar concentration of a solution?Molar concentration is a measurement of the concentration of a solute in a solution, in terms of the quantity of material per unit volume of solution. The number of moles per liter, represented by the unit sign mol/L or mol/dm³ in SI units, is the most common way to measure molarity in chemistry.
Mathematically;
Molar concentration = number of moles/volume in liters
The number of moles is also determined using the formula below:
Number of moles = mass/molar mass
Hence;
Molar concentration = mass / molar mass * volume in liters
Therefore:
mass = Molar concentration * molar mass * volume in liters
The molar mass of Be(NO₂)₂ = 101 g/mol
Mass of Be(NO₂)₂ required = 2.5 * 500 * 1/1000 * 101
Mass of Be(NO₂)₂ required = 126.25 g
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Calculate the amount in moles of H2S formed when 0. 4mol of HCl reacts with excess Sb2S3
Sb2S3+6HCl->2SbCl3+3H2S
The amount of H2S formed in the reaction of 0.4 mol of HCl with excess Sb2S3 is 1.2 moles.
To calculate the amount of H2S formed when 0.4 mol of HCl reacts with excess Sb2S3, we need to use the balanced equation for the reaction:
Sb2S3 + 6HCl -> 2SbCl3 + 3H2S
From the balanced equation, we can see that for every mole of Sb2S3, 3 moles of H2S are produced.
We have the number of moles of HCl which is 0.4 mol, and we know that HCl is in excess. So we can assume that the reaction is limited by the amount of Sb2S3.
Therefore, the number of moles of H2S produced is:
0.4 mol Sb2S3 × (3 mol H2S / 1 mol Sb2S3) = 1.2 mol H2S
So, the amount of H2S formed in the reaction is 1.2 moles.
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Although we usually think of substances as "burning" only in oxygen gas, the process of rapid oxidation to produce a flame may also take place in other strongly oxidizing gases. For example, when iron is heated and placed in pure chlorine gas, the iron "burns" according to the following (unbalanced) reaction:
Fe (s) + Cl₂ (g) -> FeCl3 (s)
How many grams of iron(III) chloride (FeCl3) result when 15.5 g of iron (Fe) is reacted with an excess of chlorine gas? Balance the equation first.
The balance equation for this reaction is 2Fe (s) + 3Cl₂ (g) → 2FeCl3 (s) 45.1grams of iron(III) chloride (FeCl3) result when 15.5 g of iron (Fe) is reacted with an excess of chlorine gas.
What is balance equation ?The balance chemical equation in which reactant are exactly equal to the product.
The balance equation for this reaction is 2Fe (s) + 3Cl₂ (g) → 2FeCl3 (s)
2 mole Fe = 2 mole FeCl₃
molar ratio = 2 mole FeCl₃ / 2 mole Fe
Atomic mass of Fe = 55.85g/mol
Thus,15.5mg of iron = 15.5mg × 1.0g / 10 ³mg
15.5 × 10 ⁻³gFe
= 2.78 × 10 ⁻⁴ mole of Fe
The molar mass of a FeCl₃ = 162.2g/mol
Therefore, amount of FeCl₃ produced = 0.0451g
= 45.1 mg
Thus, 45.1grams of iron(III) chloride (FeCl3) result when 15.5 g of iron (Fe) is reacted with an excess of chlorine gas.
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