The mass of the iron oxide produced in the given chemical reaction is equal to 27.04 grams.
What is the limiting reagent?The limiting reagent in a chemical reaction can be described as that reactant that will decide the amount of the yield of the product. The reactant consumed first will confirm the completion of the reaction if the reactants are not taken in stoichiometry.
Given the chemical reaction of the formation of iron oxide:
4Fe + 3O₂ → 2Fe₂O₃
Given the mass of the iron = 15.4 grams
The moles of the iron = 15.4/56 = 0.275 mol
The mass of the oxygen gas = 3.6 grams
The moles of the oxygen gas = 3.6 /32 = 0.1125 mol
From the chemical equation, 4 moles of the Fe react with oxygen = 3 mol
Then 0.275 mol of the Fe will react with oxygen = 3/4 × 0.275 = 0.206 mol
Therefore, oxygen is the limiting reagent here.
The 3 mols of oxygen produced iron oxide = 2 mol
0.1124 mol of oxygen will produce iron oxide = (2/3) × 0.1125 = 27.04 g
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a certain reaction is known to be second order in species a. what is the numerical value of k (in m^-1s^-1), the rate constant, if the concentration of a decreases from 1.50 m to 0.367 m after 141.4 seconds? (give your answer to 3 sig figs)
The rate constant, if the concentration of a decrease from 1.50 m to 0.367 m after 141.4 seconds the numerical value of k = 0.01460.
A rate constant is a number that describes the relationship between the rate of a chemical reaction and the molar concentration of the reactants. We can learn about the variables that affect a reaction's rate by looking at its rate constant. We can determine the dependence of the molar concentration of the reactants on the rate of reaction by knowing the rate constant.
The abundance of a constituent divided by the sum of the mixture's volumes is the definition of concentration in chemistry. There are several different categories of mathematical description: mass concentration, molar concentration, number concentration, and volume concentration. notably the state of concentration turning the focus on a single thing My focus is being disturbed by all that noise.
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is the process of mixing ethanol and water exothermic or endothermic? how do you know (use numeric data to justify)? does this suggest presence of large clusters or small clusters in the mixture?
The reaction is exothermic as it involves a bond-forming process
when the liquids are mixed temperature of the reaction between the mixture increases.
There are small and large clusters in the mixture
The exothermic reaction involves the formation of new bonds which involves a combination of the bonds to form a new compound in our case water has hydroxy ions that bond with those of ethanol.
Mixing ethanol and water in volumetric glassware reduces the volume and increases the temperature.
The numerical example
Fill two 250 mL graduated cylinders to the line with water and ethanol pure temperature sensor shows both at room temperature. Next, move the temperature probe to an empty 500 mL graduated cylinder and pour the contents of the two smaller cylinders simultaneously and mix well.
The temperature of the mixture will rise by about 8 °C and the volume will decrease to 480 this indicates that the reaction is exothermic as the temperature rises and volume reduces
yes, clusters are present as ethanol falls between the spaces left by water as it has small molecules than that of water.
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4. We are driving to Las Vegas. The sign says that it is one hundred forty-five kilometers
to Las Vegas. How many meters is it to Las Vegas?
Answer:
145,000 meters
Explanation:
1 kilometer = 1000 meter
145 kilometer = 145 times 1000 meters
so:
145 × 1000 = 145,000 meters
Write a nuclear equation for the beta decay of the following isotopes: Lead-210
In this question, we need to determine what will be the nuclear equation for the Beta decay of Lead - 210.
Beta decay is a type of radioactive decay in which we will have either a neutron becoming a proton, this will be called Beta-minus decay or a proton becoming a neutron, this will be called a Beta-plus decay
In the case of Pb-210, we will have a Beta-minus decay, and one neutron will become a proton:
210/82 Pb ---> 210/83 Bi + electron
Lead - 210 will become Bismuth - 210
QUICK QUESTION...
What is the best method to use in extracting orange sugar from a whole orange
What is it you are making exactly? It is going to be for a recipe of some sort, like a beverage or food? If you could sort of expand on what the purpose is for, I think I may be able to help you find the best method for the extraction.
balance this equation
___ H2 + ___ O2 → ___ H2O2
Answer:
1H2+1O2—>H2O2
Explanation:
Use the integer+1
Draw a carboxylic acid that results from the hydrolysis of glyceryl tributyrate. Include only one carboxylic acid product in your answer
Glyceryl tributyrate will react with 3 mol of water and form a glycerol and 3 mol of carboxylic acid.
when monosaccharides are bonded together a. polysaccharides are formed by combining many monosaccharides. b. oligosaccharides are formed by combining a few monosaccharides. c. all of these d. one h2o molecule is lost for each new link formed.
When monosaccharides are bonded together c) all of these are correct.
Monosaccharides can be described as sugars from which all other complex forms of sugars are formed. Monosaccharides are the simplest form of sugars the combination of which leads to the formation of disaccharides, polysaccharides and oligosaccharides.
When the monosaccharides join in order to form complex sugar molecules, a single molecule of water is lost by each new link or joining of molecules that occur.
As monosaccharides are simplest of sugars, they are more easily absorbed as compared to other types of sugars.
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suppose you performed a titration of a weak acid and you found that the equivalence point occurred at 14.81 ml of added naoh. at what volume would you use the ph to determine the pka of the acid? enter your answer numerically to three significant figures.
The volume at which the pH can be used to determine the pKa of the acid is 7.40 ml if the equivalence point occurred at 14.81 ml of added sodium hydroxide.
The weak acid and the conjugate base will have an equal number of moles at the half-equivalence point as the number of moles of sodium hydroxide will neutralize half of the number of moles of the weak acid which will then produce more conjugate base.
The chemical reaction can be given as;
HA = (H^+) + A^-
Calculation of pKa:
pH = pKa + log[A^-]/[HA]
At half equivalence point, pH = pKa
As, ka = 10^-pka
Therefore, ka = 10^-pH
Volume is given which is 14.81 ml. Therefore, the volume that is used to determine the pKa of the acid can be calculated as follows;
14.81/2 = 7.40 ml
Therefore the volume used to determine the pKa of the acid is calculated to be 7.40 ml
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How many grams of water are required to change the temperature of water from 25.0 oC to 35.0 oC when 4,000.0 joules of energy are released?
The mass of water required to change the temperature of water from 25.0°C to 35.0°C when 4,000 joules of energy are released is 95.6g.
How to calculate mass?The mass of a substance in a calorimetry procedure can be calculated by using the following formula:
Q = mc∆T
Where;
Q = quantity of heat absorbed or releasedm = mass of substancec = specific heat capacity∆T = change in temperatureAccording to this question, a sample of water is changed from 25.0°C to 35.0°C when 4,000 joules of energy are released. The mass of the water sample is as follows:
4000 = m × 4.184 × 10
4000 = 41.84m
m = 95.6g
Therefore, 95.6 grams is the mass of the water sample.
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a compound is found to contain 13.65 % carbon and 86.35 % fluorine by mass. what is the empirical formula for this compound? to answer the question, enter the elements in the order presented above.
Answer:
[tex]CF_{4}[/tex]
Explanation:
See attached worksheet
One molecule of silver atoms contains the same number of items found in one mole of calcium atoms. TrueFalse
When they talk about items found, they refer to molecules. According to Avogadro, one mole of any substance, regardless of its type, contains the same amount of molecules equal to 6.022x10^23.
Now they tell us about a molecule of silver and a mole of calcium. In one mole of calcium, there will be 6.023x10^23 molecules, which is different from one molecule of silver, so the answer will be false
Calculate the % Composition of the following compounds, remember that the decimal has to move 2 places at the end. (NH4)2CO3
The percent composition of (NH₄)₂CO₃ is 99.999 % ≈ 100 %.
To calculate percent composition of the elements in a compound,
the molar mass of element is divided by the molar mass of the compound and then, it is multiplied by 100.
We know that,
Molar mass of (NH₄)₂CO₃ is 96.086 g/mol.
Molar mass of each element of compound is-
Nitrogen = 2 × 14.007 g/mol = 28.014 g/mol
Hydrogen = 8 × 1.008 g/mol = 8.064 g/mol
Carbon = 1 × 12.011 g/mol = 12.011 g/mol
Oxygen = 3 × 15.999 g/mol = 47.997 g/mol
Now,
We will calculate the percent composition -
% composition of nitrogen = 28.014 g/mol × 100 = 29.155%
96.086 g/mol
% composition of hydrogen = 8.064 g/mol × 100 = 8.392%
96.086 g/mol
% composition of carbon = 12.011 g/mol × 100 = 12.500%
96.086 g/mol
% composition of oxygen = 47.997 g/mol × 100 = 49.952 %
96.086 g/mol
We will add the percentage to calculate % composition of (NH₄)₂CO₃ -
29.155 % + 8.392 % + 12.500 % + 49.952 % = 99.999% ≈ 100 %
Therefore, % composition is 99.999 % ≈ 100 %
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elemental sulfur can be converted to sulfur trioxide by reaction with oxygen in the presence of a catalyst. upon addition of water, sulfuric acid is produced as represented by the equation: s8 12 o2 8 h2o 8 h2so4 what minimum mass of sulfur , in grams, is needed to prepare 17.5 g of h2so4? (give the number with one digit after decimal point; no units)
The minimum mass of sulphur , in grams, needed to prepare 17.5 g of [tex]H_{2} So_{4}[/tex]is 53.5 gram
The molecular mass of eight molecules of sulphuric acid is 784 grams.
So 256 grams of sulphur makes 784 grams of sulphuric acid
That means 17.5 grams of sulphur can give
[tex]\frac{784}{256}[/tex] ×17.5 grams of sulphuric acid
And by solving this we get 53.5 grams.
That's how we determined the required grams of sulphur in grams.
The mass of a given molecule is its molecular mass (m), which is expressed in daltons. Because they contain various isotopes of an element, different molecules of the same compound can have distinct molecular masses. According to IUPAC, the related quantity relative molecular mass is a unitless comparison between the mass of a molecule and the unified atomic mass unit (also called the dalton).
The molar mass, which is expressed in g/mol, is defined as the mass of a given substance divided by the amount of a substance. That makes the molar mass an average of many particles or molecules, and the molecular mass the mass of one specific particle or molecule.
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after completing the experiment, a student extracts a sample of calcium carbonate with a mass of 0.818 grams from an antacid tablet that claims to have 1000 mg of calcium carbonate. what is the percent error in this student's experiment? round your answer to two decimal places. correct! 18.2
After calculating the percent error and rounding it to two decimal places, the result obtained is 18.20%.
To calculate the percent error we need to calculate the absolute error first. This is done by subtracting the actual value (1000 mg) from the measured value (0.818 g = 818 mg):
818 mg - 1000 mg = -182 mg
We then divide the absolute value of that difference (182 mg) by the actual value (1000 mg).
182 mg / 1000 mg = 0.182
This result is then multiplied by 100 percent and rounded to two decimal places:
0.182 * 100% = 18.20%
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Colin is helping the librarian return books to the shelves where they belong. He picks up books from the librarian’s desk, as shown in Figure A. He then carries them to the shelves, as shown in Figure B.
Two illustrations with the left one showing a boy lifting books up that have been sitting on a desk, and the second one showing a boy carrying books toward a bookcase on the right.
Explain why Figures A and B do or do not show work being done. Then, provide two examples (not including lifting or carrying) of how work could be done on the books.
]
The explanation of Figures A and B to do or do not show work being done is given below:
He is using energy to lift the books in picture A, which takes both force and motion to do so. In figure B, the books move along with him, and as such only effort is used to carry them. Hence, he is doing work only in Figure A.
The examples are:
A student pushing a book cart in a shopping mall.A girl lifting a bag on her back or her shoulder that is also filled with books.What is the definition of the term work done?The sum of the displacement and the component of the applied force of the object in the displacement direction is the work done by a force. Work is accomplished when we push a block with some force; the body moves more quickly.
Work completed is noted as an object must be subjected to a force and move in the direction of the force in order for work to be done on it.
Therefore, It should be converted to energy in order to move an object. Energy can be transferred by the use of force. This amount of energy that is delivered when a force is used to move an object is known as work that is done.
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Quantum Theory proposes electrons may
be found in orbitals, which are based on
what?
Bohr's planetary model
Thompson's Plum Pudding Model
the probability of finding an electron in an
area around the nucleus
The Heisenberg-Rutherford Model
A quantum is the smallest discrete unit of a phenomenon (plural: quanta). For instance, a photon is a quantum of light, while an electron is a quantum of electricity. Quantum is a Latin word that means "quantity" or "how much?" Anything that can be measured is something that can be quantified.
How does quantum theory connect to Bohr's model?Bohr's hypothesis, often known as quantum theory, postulated that electrons move around the nucleus according to the classical principles, but with restrictions on the orbits they can take and the energy they lose as radiation when they change orbits.
The Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913 and describes an atomic system with an orbiting system of electrons and a small, dense nucleus that is similar to the Solar System in structure but is attracted by electrostatic forces rather than gravity.
A small positively charged nucleus is encircled by rotating negatively charged electrons in set orbits, according to the Bohr Atomic Model. He came to the conclusion that an electron will have more energy if it is placed far from the nucleus and less energy if it is located close to the nucleus.
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True or false? First nations people along the west coast of british columbia used smelting technology to create copper plaques
First nations people along the west coast of British Columbia used smelting technology to create copper plaques is false.
Smelting process is the form of extractive metallurgy to produce a metal from its ore. it is the process of melting and separation of charges . it is extensive energy process. Plaques are made by pouring molten metal in to a mold. and when it gets cools , it solidified into a copper solid plaque. first nation people use copper as hunting weapons, spear tools etc. copper is metal.
Thus, First nations people along the west coast of British Columbia used smelting technology to create copper plaques is false.
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which statement is true about about these two solutions, if you compare them to each other: 1m of 100 ml kcl (aq) solution and 1m of 100 ml mgcl2(aq) solution? group of answer choices the mgcl2 solution has a higher amounts of ions. all of correct. the kcl solution has lower conductivity values. the kcl solution has a fewer amount of ions. the mgcl2 solution has higher conductivity values.
All are correct about two solutions of KCl and [tex] MgCl_{2}[/tex].
Both the compounds KCl and [tex] MgCl_{2}[/tex] are ionic compounds. So, they easily dissociate on contact water with constituent ions. KCl dissociates into one cation [tex] {K}^{+} [/tex] and one anion [tex] {Cl}^{-} [/tex]. [tex] MgCl_{2}[/tex] dissociates into one cation [tex] {Mg}^{2+} [/tex] and two anions [tex] {Cl}^{-} [/tex].
So, the KCl solution produces two ions while the [tex] MgCl_{2}[/tex] solution produces three ions. More number of ions means higher amount of charge can be carried at a time and hence higher conductivity will be seen. Likewise, less number of ions in the solution indicates less capacity to conduct electricity. Thus, [tex] MgCl_{2}[/tex] has higher amount of ions thus higher conductivity. Similarly, KCl has lesser amount of ions in the solution thus it has lower conductivity.
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How many Moles of H are in 5 moles of C2H4O?
How many atoms of H are in 5 moles of C2H4O?
Please help
1. The number of moles of H in 5 moles of C₂H₄O is 20 moles
2. The number of atoms of H in 5 moles of C₂H₄O is 1.20×10²⁵ atoms
1. How to determine the number of mole
The number of moles of H in 5 moles of C₂H₄O can be obtained as follow:
1 mole of C₂H₄O contains 4 moles of H
Therefore,
5 moles of C₂H₄O will contain = 5 × 4 = 20 moles of H
Thus, the number of moles of H is 20 moles
2. How to determine the number of atoms
We know from the calculation made above that 20 moles of H is present in 5 moles of C₂H₄O. Thus, we can obtain the number of atoms as follow:
From Avogadro's hypothesis,
1 mole of H = 6.02×10²³ atoms
Therefore,
20 moles of H = (20 moles × 6.02×10²³ atoms) / 1 mole
20 moles of H = 1.20×10²⁵ atoms
Thus, the number of atoms of H present is 1.20×10²⁵ atoms
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what is the change in internal energy (in j) of a system that absorbs 0.842 kj of heat from its surroundings and has 0.649 kcal of work done on it? give your answer in scientific notation.
Answer:
need the free questions srry yall
Explanation:
Electrons from fadh2 are transferred to succinate reductase and then to a small organic molecule called?.
Electrons from fadh2 are transferred to succinate reductase and then to a small organic molecule called Ubiquinone.
Electron Transport chain?
The electron transport chain main job is to produce an electrochemical gradient. It propels the production of ATP during photosynthesis and cellular respiration in mitochondria and chloroplasts, respectively. Cellular respiration uses it.
Ubiquinone transfer electrons to Complex III from Complexes I and II as well as from other mitochondrial dehydrogenases by acting as an electron transporter in the mitochondrial respiratory chain.
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how much volume in ml will you need to take from 2.7 m concentrated stock solution if you would like to prepare a diluted 0.8 solution with 100 ml? report and round your answer to a whole integer.
To make a 100 ml solution of 0.8 m from a 2.7 m concentrated stock solution we have to take a volume of: 30 ml of the concentrated solution
To solve this problem, the formula and the procedure that we have to use is:
c1 * v1 = c2 * v2
Where:
c1= concentration of the concentrated solutionv1 = volume of the concentrated solutionc2 = concentration of the diluted solutionv2 = volume of the diluted solutionInformation about the problem:
c1 = 2.7 mv1=?c2 = 0.8 mv2=100 mlApplying the dissolution of concentrations formula and clearing the volume of the concentrated solution (v1) we get:
c1 * v1 = c2 * v2
v1 = (c2 * v2)/ c1
v1 = (0.8 m * 100 ml)/ 2.7 m
v1= 29.6 ml
By rounding the volume to a whole integer value we have:
v1= 30 ml
What is a solution?In chemistry a solution is known as a homogeneous mixture of two or more components called:
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A gene or trait that appears or expresses itself over a recessive trait is called the anstwer
What is the mass of 5.36 mol of ammonia
vapor (NH3)?
Answer in units of g.
Answer:
91.12 gram
Explanation:
Number of moles of Ammonia = 5.36
Molecular Mass of Ammonia = 14 + 3 × 1 = 17 gram/mol
Mass = Number of moles × Molecular mass
Mass = 5.36 mol × 17 gram/mol = 91.12 gram
Explain FULLY what this symbol means/can tell you ( be sure to talk about numbers of protons, neutrons, and electrons.
Chlorine has 17 protons, 17 electrons and 18 neutrons. The atomic number is 17 and the mass number is 35.
Explanations:The given element is Chlorine with an atomic number of 17 and a mass number of 35. The subscript serves as the atomic number while the superscript is the mass number.
The proton number is equal to the atomic number and electron number of a chlorine atom. Therefore;
Proton number = electron number = 17
For the neutron number
Neutron number is the difference between the mass number and the proton number;
Neutron number = Mass number - Proton number
Neutron number = 35 - 17 =18
Hence there are 18 neutron numbers in a chlorine atom
The Earth's crust is part of which sphere?
Responses
biosphere
biosphere
atmosphere
atmosphere
hydrosphere
hydrosphere
lithosphere i need help asap
based on the reconstructed temperatures you saw and changes in solar irradiance and co2 concentrations over the past millennium, what century do you expect to have the largest simulated temperatures from the gcms?
20th century was expected to have the largest simulated temperature from the gas chromatography mass spectrometry.
What is temperature and gcms and what century had largest temperatures from gcms?Temperature is the measure of degree of hotness and coldness wither of a substance or a region.Gcms is gas chromatography-mass spectrometry is a complex analysis phenomena in which first gas samples are analyzed first.The sample of solid, liquid and gas are taken and in case of liquid the sample is vapourized to detect the presence of substance.Here the question is asking which century had most temperature from gas chromatography and mass spectrometry.Hence 20th century was supposed to have maximum temperature from gas chromatography and mass spectrometry.To know more about temperature visit:
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Which is equal to 4 hectometers?
Answer:
There are 400 meters in a hectometer?
Explanation:
Answer:
there are 400 meters in a hectometer?
Explanation:
christian has a mass of 5 kg. he is running across the room accelerating at a rate of 10 m/s2. what is his force?
The force required to move a body with a mass of 5kg and accelerating at 10m/s² is 50 Newtons.
What is the force of Christian?A force is simply a push or pull of a body resulting from the object's interaction with another object.
From Newton's Second Law, force is expressed as;
F = m × a
Where is mass of object and a is the acceleration
Given the data in the question;
Mass m = 5kgAcceleration a = 10m/s²Force F = ?Plug the given values into the equation above and solve for F.
F = m × a
F = 5kg × 10m/s²
F = 50kgm/s²
F = 50N
Therefore, the force of Christian is 50 Newtons.
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The force required to move the body with the mass of 5 kg with acceleration of 10 m/s² is 50 Newtons.
What is force?Force is defined as a push or pull exerted on an object as a result of the interaction of the object with another object.
It can also be defined as an external factor that, when used, alters or has the potential to alter the state of the body.
Force can be expressed as
Force = mass x acceleration
Given, Mass = 5 kg
Acceleration = 10 m/s²
So, F = m x a
F = 5 kg x 10 m/s²
F = 50 kgm/s²
F = 50 Newtons
Thus, the force required to move the body with the mass of 5 kg with acceleration of 10 m/s² is 50 Newtons.
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