There are approximately 0.0198 moles of chloride ions (Cl-) in the 0.943 g sample of magnesium chloride dissolved in 96 g of water, rounded to four decimal places.
To solve this problem, we need to determine the number of moles of chloride ions (Cl-⁻) in the 0.943 g sample of magnesium chloride (MgCl₂) dissolved in 96 g of water.
First, we must calculate the molar mass of MgCl₂.
The molar masses of Mg and Cl are 24.31 g/mol and 35.45 g/mol, respectively.
So, the molar mass of MgCl₂ = 24.31 + (2 * 35.45) = 95.21 g/mol.
Next, we will find the moles of MgCl₂ in the 0.943 g sample. Moles = mass / molar mass = 0.943 g / 95.21 g/mol ≈ 0.0099 mol of MgCl₂.
Now, since there are 2 moles of Cl⁻ for each mole of MgCl₂, the moles of Cl⁻ in the sample will be 2 * 0.0099 mol = 0.0198 mol.
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Sep Obtain Information What are the Limitation to Making Progre with Engineering Better Batterie ? What progre have Battery Engineer Made?
Better batteries deals with Rechargeable lithium batteries are in the research phases where commercial usage of some of the new types of batteries is not possible so far.
These batteries have the potential to power portable electronics of today's time. It can store more energy in any given volume and leads to longer battery life. By changing the electrolyte composition it has made it safe for long term use. However these changes are not able to reflect on commercial scale.
Currently battery engineers are looking at improving use of these batteries in smart grid and electrical transports. For instance, researchers find that the energy density of lithium-sulfur (Li-S) batteries is five times higher in comparison to Li-ion batteries. Even they are most cost effective. But there is a major challenge of dropping voltage rapidly with use.
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How many moles of Carbon Dioxide are in 5.6 x 1023 molecules of Carbon Dioxide?
Answer:
1 mol of CO2 or 40.01 g contains 6.022*10^23 molecules.
Then 5.5 g of CO2 will contain (5.5/40.01) *6.022*10^23 or 8.3*10^22 molecules
Explanation:
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.
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PLEASE HELP! How did the discovery of mid-ocean ridges support the hypothesis of continental drift?
Answer:Sea floor spreading is the phenomena of new sea floor being created through mid-ocean ridges. Wegener proposed that the continents themselves move, which is untrue. It is the tectonic plates that move. Sea floor spreading caused the break up of Pangea, which prompted Wegener to add this in support of his continental drift theory.
Explanation:
PLEASE ANSWER WITH A CORRECT ANSWER
Answer: Solar Energy Chemical Energy
Explanation:
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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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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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.
Elements that both the s and p sublevels are completely filled?
The elements of Group 18 (helium, neon, argon, krypton, xenon, and radon) are called the noble gases. They are an especially important group of the periodic table because they are almost completely unreactive, due to their completely filled outermost s and p sublevels.
What is periodic table?The chemical elements are arranged in rows and columns in the periodic table, commonly known as the periodic table of the elements.It is frequently used in chemistry, physics, and other disciplines and is frequently referred to as an icon of chemistry.All discovered chemical elements are arranged in rows (referred to as periods) and columns (referred to as groups) in the periodic table of chemical elements, also referred to as the periodic table, in ascending order of atomic number.They are arranged in rows and columns, as you will see. Periods and groups are the names given to the horizontal rows that run from left to right and the vertical columns that run from top to bottom, respectively.To learn more about periodic table refer to:
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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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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.
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.
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Answer:
The number 6 refers to the atomic number c. The numbers 12, 13, and 14 refer to the atomic mass d.
Explanation:
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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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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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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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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What is the frequency of a wave in kilohertz if it has an energy of
45 x 10 kilojoules?
The frequency of a wave in kilohertz is 6.74 x 10^35 kilohertz
It is given that
Energy of wave = 45 x 10 kilojoules
Then the connection between the energy and frequency of a photon is remarkably simple
Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency for clarity, and is distinct from angular frequency. Frequency is measured in hertz (Hz) which is equal to one event per second.
The energy equation is a direct relationship between frequency and energy because as frequency increases, so does energy.
E = h × f
where h = 6.67 × 10^-34 joule
45 x 10 kilojoules = 6.67 × 10^-34 joule x f
f = 6.74 x 10^35 kilohertz
Hence, frequency of a wave in kilohertz is 6.74 x 10^35 kilohertz
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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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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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how many atoms of oxygen are in 1.50 moles of aluminum oxide?
Element X has 30 protons and is known to exist as 3 isotopes. One isotope is 56.5% abundance and has 38 neutrons. Another isotope is 23.4% and has 39 neutrons. The other isotope is 20.1% and contains 40 neutrons. What is the average atomic mass?
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Considering the definition of atomic mass, isotopes and atomic mass of an element, the average atomic mass of the element is 68.636.
Definition of atomic massThe atomic mass of an atom is equal to the sum total of protons and neutrons in the nucleus.
Definition of isotopeIsotopes are atoms whose atomic nuclei have the same number of protons but a different number of neutrons. This is, the atomic numbers are the same, but the number of neutrons is different.
Definition of atomic massThe atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.
Atomic mass of the element in this caseIn this case, you know:
Element X has 30 protons.One isotope is 56.5% abundance and has 38 neutrons. Then, the atomic mass is 30 + 38= 68.Another isotope is 23.4% and has 39 neutrons. Then, the atomic mass is 30 + 39= 69.The other isotope is 20.1% and contains 40 neutrons. Then, the atomic mass is 30 + 40= 70.The average mass of the element is calculated as:
average mass= 68 ×0.565 + 69 ×0.234 + 70 ×0.201
average mass= 68.636
Finally, the atomic mass of the element is 68.636.
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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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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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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 elements and compounds present before a chemical reaction are called the ___________.
Answer:
The reactants
Explanation:
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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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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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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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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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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