sucrose c12h22o11 which is commonly known as table sugar reacts in dulte acid solutions to form two simpler sugars glose and fructose both which have the formula c5h12o6. The reaction is first order with respect to c12h22o11 .
first-order reaction is a chemical process in which the rate at which it occurs is linear fashion dependent on the amount of an only reactant. In other phrases, a first-order reaction is a reaction in which the rates to monitor and influence as the concentration of just one of the reacting changes. A first-order reaction is a chemical process in which the rate of the reaction is entirely determined by the concentration of just one reactant. If the concentration of the initial reactant is trebled in such reactions, the response time is also doubled.
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71. The density of osmium (the densest metal) is 22.57 g/cm². If a
1.00-kg rectangular block of osmium has two dimensions of
4.00 cm x 4.00 cm, calculate the third dimension of the block.
Answer:
y = 2.77 cm
Answer: The third dimension is 2.77 cm
“An electron is found only in specific energy levels around the nucleus of the atom.”
what is the evidence
Answer:
Hibhibihbhubhibhbuhbuhbhub
Explanation:
If exactly one molecule of solute is present in 1. 00 l of solution, what is the concentration of the solution?.
A molar solution is one that contains 1 mole of a material in 1 liter of water.
The concentration is 1.66x10-24 M if there is exactly one molecule of the solute in one litre of solution.
In this situation, 1 mole is defined as 6.02x10²³ particles, or molecules. As a conversion factor, consider the following:
1 mole = 6.02 x 10²³ molecules.
When only 1 molecule of the solute is present, use this conversion factor to determine moles of the solute:1.66x10-24 moles are equal to (1 molecule)/((1 mole)/(6.02x1023 molecules)).
Only moles remain after the molecules cancel.
By definition, concentration is the number of moles of a solute per litre. Divide the volume, in this case 1.0L, by the 1.66x10-24 moles to get:
1.66x10-24 molar, or 1.66x10-24 M, = (1.66x10-24 moles solute)/(1.0 litre).
What is the solution's concentration when 1 mole of solute dissolves in 1 liter of solution?A way to express solution concentration is by molarity. It is described as the quantity of solute that dissolves in one liter of solution.
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How can we distinguish between ethylene and acetylene chemically?
Answer:
The key difference between acetylene and ethylene is that acetylene has a triple bond between two carbon atoms whereas ethylene has a double bond between two carbon atoms. The names acetylene and ethylene sound similar, but they are different hydrocarbon compounds.Both ethylene and acetylene are hydrocarbons but the former has a carbon to carbon double bond while the latter has a carbon to carbon triple bond.
Ethylene and acetyleneBoth organic compounds are referred to as hydrocarbons.
They are also both unsaturated.
Ethylene contains a C-C double bond and belongs to the alkene group.
Acetylene contains a C-C triple bond and belongs to the alkyne group.
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____________________ are member functions that are called automatically when an object of the class type is instantiated and the __________________ is called when that object goes out of scope
Constructors are member functions that are called automatically when an object of the class type is instantiated and the Destructor is called when that object goes out of scope.
What are Cοnstructοrs and Destructοrs?Cοnstructοrs are member functiοns that are called autοmatically when an οbject οf the class type is instantiated. They are respοnsible fοr initializing the οbject's data members and preparing it fοr use.
Destructοrs, οn the οther hand, are member functiοns that are called autοmatically when an οbject gοes οut οf scοpe οr is explicitly destrοyed. They are respοnsible fοr perfοrming any necessary cleanup οr deallοcatiοn οf resοurces used by the οbject befοre it is destrοyed.
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Question 1:Describe an electron and how its movement creates an electric current.
Answer
- What is an electron?
An electron a stable subatomic particle with a negative charge of electricity, it is found in all atoms and acting as the primary carrier of electricity in solids.
- How does the electrons movement creates an electric current?
Electrons flow in a certain rate, creating an electric current. So the electrons moving freely from one place to another place will conduct electric current.
defined the objective of the lab, showing critical thinking skills.
Answer:
defined the objective of the lab, showing critical thinking skills.
As a candle burns, the size of the candle decreases, but the reading on the balance does not change. How would reading the scale change as the candle burns if the candle was not in a closed system
As the candle burns, the reading on the scale would decrease due to the decrease in the candle's mass caused by the release of gases that exert a pressure inside a closed system.
As a candle burns, the size of the candle decreases, but the reading on the balance does not change. The reading on the scale would change as the candle burns if the candle was not in a closed system as follows:
It is assumed that if the candle is not in a closed system, the candle will burn less efficiently, which means that it will release more gases into the atmosphere. When a candle burns, the wax melts, and the liquid wax is drawn up the wick by capillary action. Then, the heat of the flame vaporizes the liquid wax, creating a candle flame, which is fueled by the wax vapour.
However, when a candle burns, it does not just release heat. Gases are also formed during combustion. If these gases are confined, they exert a pressure. If the candle is in an open system, the gases will be released into the atmosphere and will not cause any pressure. If the candle is in a closed system, the gases will exert a pressure that is measurable on a scale.
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How much heat must be removed from 357 g of water at 76.9C in order to cool it down to 18.1C?
Answer:
58.8C of heat
Explanation:
76.9C is the current heat temperature, to decrease it to 18.1C we have to subtract the both and later find our answer
The mass of 1.12 liters of gas Y at STP is found to be 6.23 g. The molar mass of gas Y is
A) 56.0 g/mol
B) 89.0 g/mol
C) 125 g/mol
D) 140. g/mol
E) 157 g/mol
To find the molar mass of gas Y, we'll consider the given mass, volume, and the terms "mass", "gas", and "molar".
Molar Mass is also defined as the mass of a substance in grams contained within one mole of the supplied component.
A mole is the amount of molecules of a substance that are present in the supplied substance.
The number of molecules or atoms on any mole is fixed at 6.02214076 1023. Molar mass is measured in grams per mole.
Here's the step-by-step explanation:
1. We're given the volume of gas Y as 1.12 liters and its mass as 6.23 g at STP (Standard Temperature and Pressure).
2. At STP, 1 mole of any gas occupies 22.4 liters.
3. To find the number of moles of gas Y, divide the given volume by the volume of 1 mole of gas at STP: 1.12 L / 22.4 L/mol = 0.05 mol.
4. Now, to calculate the molar mass of gas Y, divide the given mass by the number of moles: 6.23 g / 0.05 mole = 124.6 g/mol.
The closest answer to 124.6 g/mole is 125 g/mole, so the molar mass of gas Y is:
C) 125 g/mole
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1. Determine the molecular formula of an oxide of iron in which the mass of iron and oxygen are 69.9% and 30% respectively given that the molar mass of the oxide 159.898/mol, find the empirical and molecular formula.
2. a crystalline salt when heated becomes anhydrous and loses 51.2% of its weight the anhydrous salt analysis gave the percent composition as magnesium is equal to 20.0% and sulphur is equal to 26.66% and oxygen is equal to 53.33%.
3. In three moles of Ethane calculate the following
1. calculate number of carbon atoms.
2. number of moles of hydrogen atoms
3. number of molecules of Ethane.
1a. The empirical formula of the compound is Fe₂O₃
1b. The molecular formula of the compound is Fe₂O₃
2a. The molecular formula of the anhydrous salt is MgSO₄
2b. The formula of the crystalline salt is MgSO₄.7H₂O
3i. The number of mole of carbon atoms in the compound is 6 moles
3ii. The number of mole of hydrogen atoms in the compound is 18 moles
3iii. The number of molecules in 3 moles of ethane is 1.806×10²⁴ molecules
1a. How to determine the empirical formulaFe = 69.9%O = 30%Empirical formula =?Divide by their molar mass
Fe = 69.9 / 56 = 1.248
O = 30 / 16 = 1.875
Divide by the smallest
Fe = 1.248 / 1.248 = 1
O = 1.875 / 1.248 = 3/2
Multiply by 2 to express in whole number
Fe = 1 × 2 = 2
O = 3/2 × 2 = 3
Thus, the empirical formula of the compound is Fe₂O₃
1b. How to determine the molecular formulaEmpirical formula = Fe₂O₃Molar mass of compound = 159.89 g/molMolecular formula = ?Molecular formula = empirical × n = molar mass
[Fe₂O₃]n = 159.89
[(56×2) + (16×3)]n = 159.89
160n = 159.89
n = 159.89 / 160
n = 1
Molecular formula = [Fe₂O₃]n
Molecular formula = [Fe₂O₃] × 1
Molecular formula = Fe₂O₃
2a. How to determine the molecual formula of the anhydrous saltWe'll begin by calculating the empirical formula
Mg = 20.0% S = 26.66% O = 53.33%Empirical formula =?Divide by their molar mass
Mg = 20.0 / 24 = 0.83
S = 26.66 / 32 = 0.83
O = 53.33 / 16 = 3.33
Divide by the smallest
Mg = 0.83 / 0.83 = 1
S = 0.83 / 0.83 = 1
O = 3.33 / 0.83 = 4
Thus, the empirical formula of the anhydrous salt is MgSO₄
The molecular formula of the anhydrous salt can be obtained as follow:
Empirical formula = MgSO₄Molar mass of compound = 120 g/molMolecular formula = ?Molecular formula = empirical × n = molar mass
[MgSO₄]n = 120
[24 + 32 + (16×4)]n = 159.89
120n = 120
n = 120 / 120
n = 1
Molecular formula = [MgSO₄]n
Molecular formula = [MgSO₄] × 1
Molecular formula = MgSO₄
2b. How to determine the formula of the crystalline saltWater (H₂O) = 51.2%Anhydrous salt (MgSO₄) = 100 - 51.2 = 48.8%Formula of crystalline salt =?Divide by their molar mass
MgSO₄ = 48.8 / 120 = 0.4
H₂O = 51.2 / 18 = 2.8
Divide by the smallest
MgSO₄ = 0.4 / 0.4 = 1
H₂O = 2.8 / 0.4 = 7
Thus, the formula of the crystalline salt is MgSO₄.7H₂O
3i. How to determine the mole of carbon atoms in 3 moles of C₂H₆1 mole of C₂H₆ contains 2 moles of carbon atoms.
Therefore,
3 moles of C₂H₆ will contain = 3 × 2 = 6 moles of carbon atoms
3ii. How to determine the mole of hydrogen atoms in 3 moles of C₂H₆1 mole of C₂H₆ contains 6 moles of hydrogen atoms.
Therefore,
3 moles of C₂H₆ will contain = 3 × 6 = 18 moles of hydrogen atoms
3iii. How to determine the number of moleculesFrom Avogadro's hypothesis,
1 mole of ethane = 6.02×10²³ molecules
Therefore,
3 moles of ethane = 3 × 6.02×10²³ molecules
3 moles of ethane = 1.806×10²⁴ molecules
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Complete question
2. A crystalline salt when heated becomes anhydrous and loses 51.2% of its weight the anhydrous salt analysis gave the percent composition as magnesium is equal to 20.0% and sulphur is equal to 26.66% and oxygen is equal to 53.33%. Ccalculate the molecular formula of the anhydrous and the crystalline salt. The molecular weight of the anhydrous salt is 120
A molecule containing a central atom with sp2 hybridization has a(n) ________ electron geometry. square pyramidal trigonal bipyramidal trigonal planar linear t-shaped
A molecule containing a central atom with sp² hybridization has a trigonal planar electron geometry. It's important to note that electron geometry describes the arrangement of electron domains around the central atom, whereas molecular geometry describes the actual arrangement of atoms in a molecule
In sp² hybridization, the central atom forms three hybrid orbitals by mixing one s orbital and two p orbitals. These three hybrid orbitals are arranged in a trigonal planar geometry, meaning they are oriented in a flat, triangular shape around the central atom. The trigonal planar electron geometry occurs when the central atom is surrounded by three bonding pairs of electrons, resulting in a total of three electron domains. These electron domains repel each other and try to maximize their separation, leading to the trigonal planar arrangement.
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What is the difference between a mixture and a pure substance?
Answer:
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
Explanation:
Answer:
Two substances mixed to get another new substance is called mixture
A 125.0-g sample of a metal heated to 100.0 ∘C and placed in a calorimeter that contains 250.0 g of water. The temperature rises from 24.3 ∘C to 27.2 ∘C. What is the specific heat capacity of the metal? Ignore the calorimeter in your analysis. Group of answer choices
Answer:
0.333J/g°C is the specific heat of the metal
Explanation:
The heat that the metaal gives is equal to the heat that water is absorbing. The equation is:
S(metal)*ΔT(metal)*Mass(metal) = S(H2O)*ΔT(H2O)*Mass(H2O)
Where S is specific heat, ΔT is change in temperature and mass the mass in grams of the metal and water.
Replacing:
S(metal)*(100.0°C-27.2°C)*125.0g = 4.184J/g°C*(27.2°C-24.3°C)*250.0g
S(metal) = 4.184J/g°C*(27.2°C-24.3°C)*250.0g / (100.0°C-27.2°C)*125.0g
S(metal) = 0.333J/g°C is the specific heat of the metal
Which of the following elements CANNOT be extracted directly from air? a. nitrogen b. argon c. krypton d. chlorine. All of the choices are gaseous elements
The element that CANNOT be extracted directly from air is chlorine. This is the answer to the given question.
Air is a mixture of gases that are essential to sustain life. It is made up of nitrogen, oxygen, argon, carbon dioxide, neon, helium, and many other elements. There are several methods that are used to extract elements from the air.
However, not all elements can be extracted directly from air. This is because some elements are more reactive than others and they cannot be separated by simple techniques. For example, chlorine is a reactive element and cannot be extracted directly from air. It has to be prepared by chemical methods.
Chlorine is a chemical element that has the symbol Cl and the atomic number 17. It is a halogen and is located in group 17 of the periodic table. It is a yellow-green gas that is highly reactive and is used in the production of various chemicals.
Chlorine is also used to purify water and to sanitize swimming pools and other water bodies. It has a pungent odor and can be toxic if inhaled in large quantities. Chlorine is extracted from brine by the electrolysis of sodium chloride.
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How many protons does one oxygen atom contain
Answer:
8
Explanation:
Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus
The figure shows a group in the periodic table. What is the name of this group of elements? Group of answer choices metalloids halogens noble gases
Answer:
halogens
Explanation:
on a periodic table (just search ptable.com) right under the 17 in small words it says halogens
Give the number of protons and the number of neutrons in the nucleus of the following isotopes: a) Carbon-14 b) Cobalt-60 c) Gold-197 d) Uranium-235
Explanation:
We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.
a) Carbon-14:
By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.
atomic number = n° of protons
mass number = n° of protons + n° of neutrons
n° of protons = atomic number
n° of neutrons = mass number - n° of protons
n° of neutrons = mass number - atomic number
If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.
In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.
n° of protons = atomic number = 6
n° of protons = 6
n° of neutrons = mass number - atomic number = 14 - 6
n° of neutrons = 8
b) Cobalt-60:
atomic number = 27 (from the periodic table)
mass number = 60
n° of protons = atomic number = 27
n° of protons = 27
n° of neutrons = mass number - atomic number = 60 - 27
n° of neutrons = 33
c) Gold-197:
atomic number = 79 (from the periodic table)
mass number = 197
n° of protons = atomic number = 79
n° of protons = 79
n° of neutrons = mass number - atomic number = 197 - 79
n° of neutrons = 118
d) Uranium-235:
atomic number = 92 (from the periodic table)
mass number = 235
n° of protons = atomic number = 92
n° of protons = 92
n° of neutrons = mass number - atomic number = 235 - 92
n° of neutrons = 143
Answer:
a) Carbon-14: n° of protons = 6 n° of neutrons = 8
b) Cobalt-60: n° of protons = 27 n° of neutrons = 33
c) Gold-197: n° of protons = 79 n° of neutrons = 118
d) Uranium-235: n° of protons = 92 n° of neutrons = 143
The diagram below shows the different phase transitions that occur in matter.
Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid.
Which best describes the process that arrow 1 represents?
Molecules are speeding up during boiling.
Molecules are depositing as ice on a surface.
Molecules are slowing down during condensing.
Molecules are moving from stationary positions.
a
The speed of molcules in gas mood are more than liquide
In a school’s laboratory, students require 50.0 ml of 2.50 m h2so4 for an experiment, but the only available stock solution of the acid has a concentration of 18.0 m. what volume of the stock solution would they use to make the required solution? use m subscript i v subscript i equals m subscript f v subscript f.. 0.900 ml 1.11 ml 6.94 ml 7.20 ml
The volume of stock solution they use to make the required solution is 6.94mL.
How we calculate the volume?To calculate the value of required volume we will use the below equation:
M₁V₁ = M₂V₂, where
M₁ = molarity of stock solution = 18M
V₁ = volume of stock solution = to find?
M₂ = molarity of H₂SO₄ solution = 2.50M
V₂ = volume of H₂SO₄ solution = 50mL
On putting all these values on the above equation and calculate for the value of V₁ as:
V₁ = (2.50)(50) / (18)
V₁ = 6.94mL
Hence correct option is (3) i.e. 6.94mL.
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Answer:
C. 6.94 mL
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
a 0.458 g sample of khp (molar mass 204.22 g/mol) is titrated to a pink phenolphthalein endpoint with 12.84 ml of a naoh solution. what is the concentration of the solution?
0.175M is found to be the concentration of the solution from the given titration reaction.
The idea of concentration is one that is frequently utilized in chemistry and related domains. It is a measurement of how much of one substance is diluted with another.
A chemical species' concentration in a solution, specifically the quantity of a solute per unit volume of solution, is measured by its molar concentration.
Given:
Weight = 0.458g
Volume = 12.84mL
Molecular weight = 204.22g/mol
To find:
Concentration = ?
Formula:
Concentration = no. of moles / volume
Calculations:
No. of moles = weight given / molecular weight
No. of moles = 0.458 / 204.22g/mol
No. of moles = 2.242 x \(10^{-3}\) mol
Concentration = 2.242 x \(10^{-3}\) / 12.84mL
Concentration = 0.175M
Result:
The concentration of the given solution is found to be 0.175M
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to form ozone in the stratospheric ozone layer, a reaction splits an oxygen molecule (o2) into oxygen atoms, which then combine with oxygen molecules to make an ozone molecule
To form ozone in the stratospheric ozone layer, a photochemical reaction splits an oxygen molecule (\(O_2\)) into oxygen atoms. These oxygen atoms then combine with other oxygen molecules to form ozone (\(O_3\)). This particular reaction requires ultraviolet (UV) radiation that is present in sunlight.
Here is the process:
1. Ultraviolet (UV) radiation from the sun penetrates the Earth's atmosphere and reaches the stratosphere.
2. When UV radiation interacts with an oxygen molecule (\(O_2\)), it breaks the bond between the two oxygen atoms, resulting in two oxygen atoms.
3. These oxygen atoms are highly reactive and can quickly react with other oxygen molecules (\(O_2\)) in the atmosphere.
4. The oxygen atoms combine with the oxygen molecules to form ozone (\(O_3\)). This reaction releases energy.
5. The ozone molecules that are formed contribute to the formation of the stratospheric ozone layer, which plays a vital role in absorbing and filtering out harmful UV radiation from the sun.
In summary, the photochemical reaction in the stratospheric ozone layer involves the splitting of oxygen molecules by UV radiation from the sun, followed by the combination of oxygen atoms with other oxygen molecules to form ozone. This process helps protect the Earth's surface from excessive UV radiation.
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Complete question: to form ozone in the stratospheric ozone layer, a ________ reaction splits an oxygen molecule (\(O_2\)) into oxygen atoms, which then combine with oxygen molecules to make an ozone molecule (\(O_3\)). This particular reaction requires ________ radiation that is present in sunlight.
A 2 g sample of CoCl2.H2o is dried in the oven when the ahydrous salt is removed from the oven its mass is 1.565g what is the value of x?
A 2 g sample of \(CoCl_{2} .xH_{2} O\) is dried in the oven when the anhydrous salt is removed from the oven its mass is 1.565 g then the value of x is 0.024 .
Calculation ,
mass = 2 g ( given )
molar mass = 134.45 + x × 18
After dehydration or when the anhydrous salt is removed from the oven mass remain = 1.565 g
Molar mass = 134.45
Thus mass of \(H_{2} O\) = 2 g - 1.565 g = 0.435 g
Number of moles of water = 0.435 g / 18 = 0.024 moles
Therefore value of x = 0.024
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Is it possible to change a scientific theory?
Answer:
I think the first option is the answer
A piece of metal is placed in a clear solution. Bubbles form and the metal disappears. The mass of the final solution is less than the mass of the
first solution and the metal. Is this an exception to the law of conservation of mass? Explain.
Metals on reaction with acids liberate Hydrogen gas. This is the reason why bubbles are formed in the solution.
When the metals reacts with acids the mass of the metal will decreases with the liberation of hydrogen gas . This can acts as a exception for law of conservation of mass.
What is law of conservation mass?The law of conservation of mass determines that in a chemical reaction mass can neither be created nor destroyed. For instance , the carbon atom in coal as carbon dioxide when it is burned. The carbon atom transforms from a solid structure to a gas but its mass doesn't changes.
Does mass increase or decrease after a chemical reaction?The principle states that the mass of matter, in a closed system, will always be the same no matter what type of change can happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination , the amount of mass will not be change.
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Enabling auto-tagging does what?
Enabling auto-tagging allows for automatic tagging of certain attributes or information within a system or program.
This can save time and effort by eliminating the need for manual tagging and ensuring accuracy in the tagging process. Enabling auto-tagging is a process that allows an analytics or advertising platform to automatically assign tags to specific elements in a campaign or website. This helps in tracking and organizing data more efficiently, making it easier to analyze and optimize your online presence. When auto-tagging is enabled, the system will automatically generate and add tags to your URLs or content without the need for manual input, saving time and effort.
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use the activity series of metals to predict the products of the following single-replacement reaction.
NiCl2 + Fe
explain your answer
The reaction between NiCl2 and Fe is a single replacement reaction. A single replacement reaction involves an element reacting with a compound to produce a new element and a new compound. This reaction follows the general equation; A + BC → AC + B.
The activity series of metals will be used to predict the products of a single-replacement reaction when NiCl2 reacts with Fe. Here are the steps involved in predicting the products of a single-replacement reaction; Steps to predicting the product of a single-replacement reaction: Identify the metal that is being displaced. Metals on the left of the activity series of metals are known to displace metals on the right of the series. This is because metals on the left are more active than those on the right.Look for the element that is being displaced. Fe is being displaced since Ni is higher than Fe in the activity series of metals. As a result, Fe will be replaced by Ni. Identify the product. The Ni metal and Fe2+ will be produced by the reaction.
NiCl2(aq) + Fe(s) → Ni(s) + FeCl2(aq)
The balanced chemical equation will be
NiCl2 + Fe → FeCl2 + Ni
The reaction between NiCl2 and Fe is a single replacement reaction. A single replacement reaction involves an element reacting with a compound to produce a new element and a new compound. This reaction follows the general equation; A + BC → AC + B.
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True or false: the moment of inertia of a hoop that has a mass and a radius is greater than the moment of inertia of a disk that has the same mass and radius.
It is true that the moment of inertia of a hoop that has a mass and a radius is greater than the moment of inertia of a disk that has the same mass and radius.
Lower moments of inertia signify that only small forces are required to create a rotation, whereas higher moments of inertia mean that greater force must be used. The masses with the largest moment of inertia are those that reside furthest from the axis of rotation.
Due to the fact that a ring's center of mass is located on an axis that is perpendicular to its plane and passes through it, a ring has a higher moment of inertia than that of a circular disc of equal mass and radius. Because all of a ring's mass has been concentrated at the rim, which is furthest from the axis, which has a greater moment of inertia.
Therefore, the given statement is true.
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A system releases 7.3 kJ of heat while 1.7 kJ of work is done on it. Calculate ΔE.
The system's internal energy (E) changed by -9 kJ.
Calculation-The heat (q) introduced to the system minus the work (w) performed by the system equals the change in internal energy of a system (E), according to the first law of thermodynamics:
ΔE = q - w
In this instance, the system produces 1.7 kJ of work while releasing 7.3 kJ of heat (q = -7.3 kJ). When we enter these values into the formula above, we obtain:
ΔE = -7.3 kJ - 1.7 kJ = -9 kJ
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Use the reaction to answer the question.
3MnO4 + 4H2MnO4 + 2H₂O + MnO₂ (s)
How would adding MnO42- ions affect this reaction?
(1 point)
O The equilibrium would shift to the right, and the concentration of MnO4 ions would increase.
O The equilibrium would shift to the right, and the concentration of MnO₂ would decrease.
O The equilibrium would shift to the left, and the concentration of H₂O would decrease.
O The equilibrium would shift to the left, and the concentration of H* ions would increase.
As the MnO4- ion is absent from the balanced equation, adding MnO4- ions to this reaction would have no impact on the outcome of the reaction. Thus, none of the available choices is appropriate.
Why does MnO4 not explain why MnO42 performs a disproportionation reaction in an acidic medium?Manganese cannot be oxidised in MnO4 because it is at the highest possible oxidation state of +7; as a result, disproportionation is not feasible. In contrast, MnO42 has Mn in the +6 oxidation state, which can be both oxidised and reduced.
What does the term "disparity reaction" mean?A disproportionation reaction is one in which the same element undergoes both oxidation and reduction at the same time. In this kind of reaction, one material yields two product
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