Automotive batteries are an example of corrosive materials which comes under class 9 category.
Automotive batteries are most hazardous. lithium-ion and lithium-metal batteries, which fall into the Class 9 category. This means that they must be disposed of according to the regulations for hazardous waste. If you are unsure about which class your battery falls under, you can check with your local safety department to find out how to properly dispose of it. When you’re transporting automotive batteries, you must make sure that you package them separately. You must make sure that the terminals are separated from each other and not part of the stacking structure. When you’re disposing of a car battery, you must make sure that the battery is packaged properly. Then, you must label it as hazardous materials and make sure it is packed correctly. The packaging should also include the UN number and the proper description of the material. It can cause damage. we should be careful handling automotive batteries.
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Calculate the molarity of 0.205 L of a solution that contains 156.5 g of sucrose
Answer:
2.23 M
Explanation:
Molarity is given as moles of solute per liter of solution ([tex]\frac{mol}{L}[/tex])
To solve this problem, the molecular weight (M.W.) of sucrose ([tex]C_1_2H_2_2O_1_1[/tex]) must be calculated:
C: 12.01 [tex]\frac{g}{mol}[/tex]
H: 1.01 [tex]\frac{g}{mol}[/tex]
O: 16.00 [tex]\frac{g}{mol}[/tex]
Total M.W.= 12(12.01[tex]\frac{g}{mol}[/tex])+22(1.01[tex]\frac{g}{mol}[/tex])+11(16.00[tex]\frac{g}{mol}[/tex])=342.34[tex]\frac{g}{mol}[/tex]
Moles of sucrose can be found through dimensional analysis:
[tex]156.5g(\frac{1mol}{342.34g})=0.457mol[/tex]
Molarity can be found with:
[tex]Molarity=\frac{0.457mol}{0.205L}\\Molarity=2.23M[/tex]
If the reactants of a reaction have one S and four O atoms, what will the
products have?
A. Four S atoms and one O atom
B. One S atom and four O atoms
C. One S atom and one O atom
D. Four S atoms and four O atoms
Answer:
B
Explanation:
There's a law (very important) in chemistry.
The conservation of mass law states:
The same amount of matter exists before and after the change—none is created or destroyed
The reactants are on the left side of the equation, or the things that get added together to make new products.
Due to this law, there must be the same amount of each atom on both the product, and reactant side.
Thus, your answer would be 'B' as there is the same amount of both types of atoms.
Why is the law of conservation important in chemical reactions?
Law of conservation of mass is important for chemical reaction because it helps us to determine the rearrangements done in the chemical reaction.
The law of conservation of matter and the law of conservation of energy, essentially states that neither any type of energy can be created nor destroyed during the process, only states of matter can be transformed.
Law of conservation of matter helps us in analyzing what is happening to the chemicals that is undergoing this kind of change. The atoms present in the chemicals are just being rearranged, not created or destroyed, so this aspect of chemical changes allows us to determine what the rearrangements are.
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What are two significant differences between a modernist and postmodern perspective?
Postmodernism revives the obsession with the outside and the creation of new worlds while modernist focuses on the psychological and interior. To challenge established literary conventions.
Postmodernism employs pastiche, black humour, and parody. Someone who supports studying contemporary topics above old classics is someone who adheres to or appreciates modern ways, habits, etc. Postmodernism is an intellectual position or mode of discourse characterised by an attitude of scepticism toward the "grand narratives" connected to modernist, opposition to ideas of epistemic certainty or the stability of meaning, and emphasis on the function of ideology in upholding systems of socio-political power. Kant's "Copernican revolution, " which is the first example of the philosophical modernity at issue in modernist.
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What is known as the transformation of chemical substance into another chemical substance?
Chemical reactions are the process by which an existing chemical substance is changed into a different chemical substance by forming and breaking bonds between various atoms.
What is the name for the process by which one substance becomes another?In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products.
What does chemistry mean by chemical transformation?Molecules can undergo a chemical change when they collide with enough force.An activation barriers that separates reactants and products is typically broken down during a reaction when the atoms are heated or exposed to radiation.
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Identify the products formed in this Brønsted-Lowry reaction.
HPO2−4+HNO2↽−−⇀acid+base
acid: base:
The Brønsted-Lowry reaction can be written as; [tex]HPO_{4} ^{2-} + HNO_{2} ----- > H_{2} PO_{4} ^- + NO_{2}^-[/tex]. A proton was transferred in the reaction.
What is the Brønsted-Lowry reaction?We know that there are various definitions of acids and bases. One of the definitions of an acid is that an acid is a substance that is able to donate a proton. In this case we look upon an acid as a proton donor in a reaction. The base is a substance that is able to able to accept to proton hence we would classify the base as a proton acceptor in a given reaction.
We now have to look at the reaction as we have seen it here. In this case, we are looking at the reaction between the substance and we are looking at the one that looses a proton and the one that gained a proton so as to be able to obtain the products of the reaction.
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What is the law of conservation of matter and how does it apply to chemical reactions generation genius?
Law of conservation of mass means mass can't be created nor destoryed but transformed from one form to another.
Although matter can change shape through physical and chemical processes, it always conserves itself. No matter is created or destroyed; the amount of matter is constant. Hence the Law of Conservation of Mass is the name given to this idea.According to the rule of conservation of mass, mass is neither generated nor destroyed during a chemical process. The carbon atom in coal, for instance, changes into carbon dioxide when it burns. Although the carbon atom changes from a solid to a gas, its mass does not change.The principle of matter conservation. argues that matter cannot be created or destroyed during a chemical reaction. The same number of atoms exist before and after the changes even though the matter may change from one form to another. reactant.To learn more about law of conservation of mass visit:
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Please help me answer this!!! 20 points
Metals lose electrons to form cations. Do the cations have a smaller or larger ionic radius than the neutral atom from which they were formed? Why?
Cations are formed through lose of electrons and thus, possess positive charge. Cations has smaller ionic radius than the neutral atom, because, they have are fewer electrons and thus experience more nuclear attractive pull.
What are cations?Cations are charged particles or ions formed by the lose of electrons from the neutral atom. Atoms acquires positive charge when they lose electrons and acquire negative charge by gaining electrons and the negative ions are called anions.
For example, Na metal loses one electrons to form the cation Na+. Similarly Mg loses two electrons, to form Mg²⁺ ion. When these atoms loses electrons, the outermost shell can be emptied and the atomic radius shrinks to the penultimate shell.
Similarly, as the number of electrons reduces, the screening of electron from neighboring electrons reduces results in greater nuclear attractive pull and thereby the atomic radius shrinks to smaller than the neutral atom.
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What is the comparison of ionic and covalent bonds?
Comparisons between ionic and covalent bonds are:
Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between two atoms. Ionic bonds are typically stronger than covalent bonds, but covalent bonds are more stable and can form more complicated structures.What is the importance of ionic bonds and covalent bonds?Ionic bonds and covalent bonds are important to chemistry, because they form the basis of most molecules and compounds. Ionic bonds are attracted electrostatically between two oppositely charged ions, while covalent bonds are formed when two atoms share electrons.
Both types of bonds are important in forming the strong, stable molecules that make up all matter on Earth. Without these types of bonds, many of the substances we rely on every day would not exist.
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What type of bond does BaO have?
BaO has ionic bond.
There are many types of chemical bonds that bond the molecules together. The most important types of bond are ionic and covalent bonds. In ionic bond, electrons transfer takes place whereas in covalent bonding, sharing of electrons takes place.
We need one electron donor and one electron acceptor in case of ionic bond but in case of covalent bonds, atoms with same electronegativity share the electrons. Also, ionic bonds are formed between metal and non- metal and covalent bonds are formed between two nonmetals.
In this question, we need to determine whether BaO is covalent or ionic. Here, in this case barium is metal and oxygen is non-metal. Ionic bonds generally occur between metallic elements and nonmetallic elements. Hence, there is a bond between metal and non-metal so the bond formed will be ionic.
Therefore, BaO has an ionic bond.
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Hi, can someone please help me :)
The name of the following compounds is methylene, methyl, hexane hex-3-ene, octane, pent-1-ene propan-1-ene, propyne, Propane respectively.
What is molecular compound?
Molecular compounds are inorganic compounds that take the form of discrete molecules. Examples include such familiar substances as H2O and carbon dioxide (CO2) . These compounds are very different from ionic compounds like sodium chloride (NaCl). Ionic compounds are formed when metal atoms lose one or more of their electrons to non-metal atoms. The resulting cations and anions are electrostatically attracted to each other.
So, what holds the atoms of a molecules together?
Rather than forming ions, the atoms of a molecule share their electrons such that the way that a bond forms between a pair of atoms. In a carbon dioxide molecule, there are two of these bonds, each occurring between the carbon atom and one of the two oxygen atoms.
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How are metals and metalloids the same?
The metals and the metalloids are same as they share some of the properties.
The metalloids are those which share some of the properties of the metals and some of the properties of the non metals. metalloids share some properties of metals like metalloids are lusters. metalloids are located in the p block. metalloids are electrically good as metals.
The metalloids are semiconductor . metalloids are also called as semimetals. metalloids are boron , silicon, germanium , arsenic, antimony. metalloids are soli at room temperature. metalloids also posses some of the properties of the non metals. the properties of metalloids lies in between the metals and the non metals.
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In a reaction, 4.30x10³ mL of gas is evolved. The pressure of the gas is 0.605 atm, and the temperature is 295. Kelvin. The value of R is 0.0821 L.atm.K
1.mol-¹.
Calculate the moles of gas evolved, n.
Quote your answer to three significant figures.
Moles of gas evolved = _____ moles
Considering the ideal gas law, the number of moles evolved is 0.1075 moles.
Ideal gas lawAn ideal gas is a theoretical gas composed of a set of point particles with random displacement, which do not interact with each other.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances. n is the number of moles of the gas.Number of moles in this caseIn this case, you know:
P= 0.605 atmV= 4.30x10³ mL= 4.3 L (being 1000 mL= 1 L)n= ?R= 0.082 (atmL)/(molK)T= 295 KReplacing in the ideal gas law:
P×V = n×R×T
0.605 atm× 4.3 L= n× 0.082 (atmL)/(molK)× 295 K
Solving:
(0.605 atm× 4.3 L)÷ (0.082 (atmL)/(molK)× 295 K)= n
0.1075 moles= n
Finally, the number of moles in this case is 0.1075 moles.
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define covalent radius
Covalent radius is one half the distance between centre of nuclei of two similar atoms held together by single covalent bond.
A 1.81 mol sample of Xe gas is confined in a 42.6 liter container at 14.1 °C.
If the amount of gas is increased to 2.72 mol, holding the volume and temperature constant, the pressure will increase because:
The pressure of the xenon gas will increase if the number of moles increases because as more molecules are in the container, the molecules hit the container of the wall more often (option C).
What is an ideal gas?Ideal gas is a hypothetical gas, whose molecules exhibit no interaction, and undergo elastic collision with each other and with the walls of the container.
According to this question, a 1.81 mol sample of Xenon gas is confined in a 42.6 liter container at 14.1 °C. If the amount of gas is increased to 2.72 mol, holding the volume and temperature constant, the pressure will increase.
An increase in the number of gas molecules, while container volume stays constant causes the pressure to increase due to the fact that the molecules will collide more with the walls of the container.
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Enter your answer in the provided box.
A system conducts 270 cal of heat to the surroundings while delivering 227 cal of work. What is the change in internal energy of the system (in cal)?
______ cal
The change in internal energy of the system (in cal), given it conducts 270 cal of heat to the surroundings while delivering 227 cal of work is -497 cal
How do I determin the change in the internal energy?Change in internal energy is related to work and heat energy according to the following equation:
ΔU = ΔQ - ΔW
Where
ΔU is the change in the internal energyΔQ is the heat energyΔW is the work doneApplying the above formula, we can determine the change in the internal energy of the system as follow:
Heat released (ΔQ) = -270 calWork done (ΔW) = 227 calChange in internal energy (ΔU) =?ΔU = ΔQ - ΔW
ΔU = -270 - 227
ΔU = -497 cal
Thus, the change in the internal energy is -497 cal
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What is the concentration of sodium ions in 0.255 M Na₂CO₃?
Baking soda or bicarbonate of soda, often known as sodium bicarbonate (IUPAC name: sodium hydrogencarbonate , is a chemical substance having the formula NaHCO3.
What is sodium bicarbonate?It is a salt made up of the bicarbonate anion (HCO3) and the sodium cation (Na+). Sodium bicarbonate is a white, crystalline solid that frequently takes the form of a fine powder.
It tastes somewhat alkaline and salty, like washing soda. Nahcolite is the natural mineral form. It is dissolved in many mineral springs and is a part of the mineral natron.
The salt is known by several names, including baking soda, bread soda, cooking soda, and bicarbonate of soda, and is frequently found next to baking powder in supermarkets due to its long history and widespread use.
Therefore, Baking soda or bicarbonate of soda, often known as sodium bicarbonate (IUPAC name: sodium hydrogencarbonate , is a chemical substance having the formula NaHCO3.
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how many formula units of na2so4 are present in a 450 gram sample
Na₂SO₄ contains 1.90834 X 10²⁴ molecules or formula units in a 450 gram sample.
Formula unit- The chemical formula of an ionic compound that lists the ions in the smallest ratio that corresponds to a neutral electrical charge is known as a formula unit. Chemical formulae are used to describe the constituent parts of a compound in chemistry.
Na₂SO₄ molecular mass is 23x2+ 32+ 16X4.
= 142g/mol
Na₂SO₄ mass = 450g
Na₂SO₄ moles are equal to mass/molar mass.
450g/142g/mol = 3.170 mol.
6.02 X 10²³ mol is the Avogadro's number.
formula unit= moles * Avogadro's number
⇒3.17 X 6.02 X 10²³ molecules= 1.90834 X 10²⁴
Na₂SO₄ therefore contains 1.90834 X 10²⁴ molecules or formula units..
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to identify hazardous materials in the dc
To identify the hazardous materials in the dc there are the Hazardous waste branch to protect human health and the environment .
The Hazardous Waste Branch protects human health and the environment from the hazards of mismanaged waste, helps reduce the amount of waste generated, and ensures that generated wastes are managed in an environmentally sound manner. Facilities that generate, transport, treat, store, or dispose of hazardous waste, universal waste, or used oil are regulated to ensure proper management of these waste from the moment it is generated until its ultimate disposal or destruction. The labels of hazardous chemicals usually contain the words 'danger' or 'warning', along with relevant pictograms and details of hazards.
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Offshore drilling is a common practice for obtaining oil for human use. For this process, a building the size of two football fields is built over the spot in the ocean that is going to be drilled into. The rig can last 30 years and remove millions of gallons over its time in service. Oil can be used for transportation fuels, production of plastic, and making electricity. Which of the following statements best describes an environmental concern with using offshore drilling to obtain oil?
A. Offshore drilling can increase biodiversity by changing the ecosystem.
B. Offshore drilling produces more greenhouse gasses than burning the oil itself
C. Offshore drilling requires a large amount of land use to obtain a small amount of oil
D. Offshore drilling can lead to contamination which threatens the organisms that live there
The statement that best describes an environmental concern with using offshore drilling to obtain oil is that Offshore drilling can lead to contamination which threatens the organisms that live there. That is option D.
What is off shore drilling?Offshore drilling is defined as one of the industrial method that is used for the extraction of oil from the seabed through method of drilling.
The disadvantages of offshore drilling include the following:
The increase risk of oil spill to the nearby aquatic body endangering the aquatic animals in the environment.Also the release of volatile organic compounds, greenhouse gases, and other air pollutants that can cause harm to human population.Learn more about greenhouse gases here:
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Question 4 of 25
Trevor used a ramp to get a box into a truck. His input work was 700 J and
the output work was 400 J. What was the mechanical efficiency of using the
ramp?
A. 175%
OB. 57.1%
C. 100%
D. 42.8%
SUBMIT
Answer: B, 57.1%
Explanation: 400 divided by 700 = .571 (roughly), which is 57.1%
Mg metal was burned in a inverted beaker of air suspended over a tank of water. There was originally 300ml of air and after burning there was only 254ml of air remaining. If oxygen makes up 20.95% of air then how much Mg was reacted with oxygen?
The mass of magnesium that reacted with oxygen as determined from the moles of reactants is is 0.01 g.
How many moles of oxygen took part in the reaction with magnesium metal?
The number of moles of oxygen that took part in the reaction with magnesium metal is determined from the volume of oxygen that reacted with the magnesium metal.
The volume of oxygen that reacted with magnesium metal is determined as follows:
The volume of air that reacted with magnesium metal = initial volume - final volume
The volume of air that reacted with magnesium metal = 300 mL - 254 mL
Volume of air = 46 ml
Volume of oxygen in the air = 46 * 20.95%
Volume of oxygen in the air = 9.64 mL
Moles of oxygen = 9.64 * 1 mol/22400 mL
Moles of oxygen = 0.00043 moles
Moles of oxygen = moles of Mg
Moles of Mg = 0.00043
Mass of Mg = 0.00043 moles * 24 g/mol
Mass of Mg = 0.01 g
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calculate the relative formula mass of copper oxide if O=16 and Cu=64
Copper oxide, CuO has a relative formula mass of 80.
What is the Relative Formula mass?
This refers to the total of the relative atomic masses of the atoms in the numbers seen in the formula.
What is Relative Atomic mass?This refers to the relative mass of atoms when compared with the carbon-12 atoms Ar. Relative formula mass is a measure of relative mass, thus it has no unit.
Calculating Relative Formular mass?Solve for the number of atoms each element presents in the chemical formula. Sum the Relative atomic values for all the atoms present. From the question:O=16 and Cu=64
copper oxide, CuO= (1 * 64) + (1 * 16)
= 64 + 16
=80
Where,
1 = The subscript value of the element present.
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Is cf4 polar or nonpolar?
A nonpolar covalent molecule is called carbon tetrafluoride. If we examine the bonds separately, fluorine has an electronegativity of 4.0 and carbon has a value of 2.5.
A nonpolar molecule, CF4 is. The CF4 molecule as a whole is non-polar, despite the fact that all C-F bonds are polar because fluorine and carbon have different electronegativity levels. This happens as a result of the fluorine atoms being symmetrically arranged around the core carbon atom.
The simplest perfluorocarbon is tetrafluoromethane, also referred to as carbon tetrafluoride or R-14. Tetrafluoromethane, as its IUPAC name suggests, is the perfluorinated equivalent of the hydrocarbon methane. It is also a haloalkane or halomethane, respectively.
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what is the implication of an unbalanced chemical equation
An unbalanced chemical equation contains an unequal number of atoms on both sides of the equation. No chemical changes will occur with unbalanced chemical equations.
The unbalanced chemical equations can not prove the law of conservation of mass.In unbalanced chemical equations, the number of atoms in the reactants is not equal to the number of atoms in the products.Products cannot be formed from an unbalanced equation. Information related to chemicals cannot be obtained from an unbalanced chemical equation.Therefore, results cannot be obtained from unbalanced chemical equations.
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what does a neutral atom look like
A neutral atom contains two charged particles; protons and electrons. Neutrons are neutral particles.
Neutrons and protons are present inside the nucleus of the atom. Electrons revolve around the nucleus of the atoms in orbital paths known as shells.
The number of electrons in an atom is always equal to the number of protons. Therefore, the charge on a neutral atom is always zero. When an atom loses or gains electrons, it becomes a charged particle. This charged particle is known as ion.
Therefore, only a neutral atom has zero charges.
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Which quantity determines how two atoms bond?
Electronegativity is the capacity of an atom in a molecule to draw shared electrons. The difference in the electronegativities of two atoms determines the type of bond that will result from their union.
The bonding between atoms in a solid is determined by the
1. magnitude of the electronegativities of the solid's atoms and 2. variations in these electronegativities.
As a result, the bond-type triangle shown in the image below can be used to identify which category a solid should fall under. For compounds with metallic bonds, ionic solids should be used, followed by network covalent solids for compounds with ionic bond, and molecular solids for compounds with covalent bonds.
Combinations of atoms whose electronegativities and electronegativity discrepancies place them in the lower left corner of the bond-type triangle seen in the above picture are predicted to form metallic solids. Covalent materials are located in the lower right corner of this triangle, while ionic compounds are located in the triangle's center, at the top.
Hence, electronegativity determines how two atoms bond.
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If you put a 20 kg mass at 0.5 meters where on the other side do you have to put the
10 kg mass to balance the lever?
0.25 meters
0.5 meters
0.75 meters
1 meter
1.25 meter
1.5 meter
1.75 meter
2 meter
The 10 kg mass have to balance the lever at 1 meter.
What is torque?
The torque is the propensity of a force to cause the rotation of a rigid body. The angle between the force's line of action and the rotational axis is equal to the product of the force and the moment arm.
The point of support serves as the "fulcrum." It is situated at the rotational axis in this instance. The 20 kg load on the left is creating a torque that is attempting to counterclockwise rotate the lever .According to the right hand rule, this torque is positive. A torque created by the 10 kg mass to the right is attempting to rotate the in a clockwise direction. This torque is adverse. In either scenario, the torque's magnitude is equal to the mass's weight (m*g) times its moment arm (distance to the fulcrum, d)
Torque = mass *distance
m1d1 = m2d2
20*0.5 = 10* d2
d2 = 1
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Is ccl4 polar or nonpolar?
PLEASEEEEEEEEEEEEEEE HELP?!!!!!!!!???!!¡¡¡
Calculate the enthalpy for 1 mole of NO2 using the Lewis structure and bond enthalpies given.
The enthalpy for 1 mole of NO2 is -304.1 KJ/mol
What is enthalpy?
A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's internal energy to the product of the its pressure and volume. It is a state function that is frequently used in measurements of chemical, biological, as well as physical systems at constant pressure, which the sizable surrounding atmosphere conveniently provides. The pressure-volume term describes the effort needed to create space for the system by displacing it's own surroundings in order to determine its physical dimensions.
Calculate of enthalpy is like :-
NO(g)+O3(g), NO2(g)+O2(g), and H=198.9kJ/mol.............. (i)
O3 (g), 2O3 (g), O2 (g), and H=142.3 kJ/mol
2 3 O 2 (g), O 3 (g), with a given heat capacity of 142.3 kJ/mol................ (ii)
O 2 (g), 2O (g), O 2 (g), H= 495.0 kJ/mol O (g), and so on.
H=2 495.0 kJ/mol for 2 1 O 2 (g)..................... (iii)
NO(g)+O(g)+NO 2 (g); H=(198.9+142.3 2 495.0 )kJ/mol
when I (ii), and (iii) are added.
ΔH=−304.1kJ/mol
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