In a titration of 35.00 mL of 0.737 M H₂SO₄, 62.4 mL of a 0.827 M KOH solution is required for neutralization.
What is Neutralization?The interaction of H+ ions and OH- ions produces water in a neutralization reaction, which occurs when an acid and a base react to form water and salt. A pH of 7 results from the neutralization of a potent acid and a potent base.
Calculation:
The balanced reaction is
H₂SO₄ + 2 KOH ⇒ 2 H₂O + K₂SO₄
The molarity M is the number of moles of solute that are dissolved in a given volume, expressed as:
number of moles = molarity × volume
For H₂SO₄
35.00 mL= 0.035 L (being 1,000 mL= 1 L)
Molarity= 0.737 M
Then,
number of moles= 0.737 M × 0.035 L
number of moles= 0.0258
So you must neutralize 0.0258 moles of H₂SO₄. Now you can apply the following rule of three: if by stoichiometry 1 mole of H₂SO₄ is neutralized with 2 moles of KOH, 0.0258 moles of H₂SO₄ are neutralized with moles of KOH =?
moles of KOH = 0.0516,
Then 0.0516 moles of KOH are needed.
Molarity= 0.827 M
number of moles= 0.0516
volume=?
Replacing in the definition of molarity: 0.827M = 0.0516 moles/ volume.
= 0.0516moles/0.827M = volume
volume = 0.0624 L= 62.4 mL.
Hence, 62.4 mL of a 0.827 m KOH solution is required for neutralization.
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How many grans of oxygen can be produced when 15.6g of sulfur trioxide are decomposed?
9.35 grams of oxygen can be produced when 15.6g of sulfur trioxide are decomposed.
How to find ?2SO₃ → 2S + 3O₂
15.6gSO₃ ˣ 1molSO₃ / 80.07gSO₃ ˣ 3molO₂/2molSO₃ˣ32.00gO₂/1molO₂
= 9.35181716g O₂
=9.35g O₂
What is Stoichiometry?For a method that chemists employ to quantify quantities in reactions, stoichiometry is a huge word. To connect the reactants and products in reactions, it makes use of the coefficient ratio established by balanced reaction equations.
Calculating the amounts of reactants and products in a chemical process is called stoichiometry. A balanced solution is required!
• Examples of reaction stoichiometry questions concern quantities in reactions. The resources needed to answer this question are currently at our disposal.
We simply need to learn a new approach to put skills like writing chemical formulas, figuring out formula masses, and putting mass, particles, and gas volume into moles into use.
• Mole to Mole Conversions: The Mole Ratio is required.
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How to find ?nitric oxide, n o no, reacts with oxygen gas to form nitrogen dioxide, a dark brown gas. if 8.0 g 8.0 g of o 2 o2 is allowed to react with 20. g 20. g of n o no, what mass of the excess reagent remains after the reaction is complete? assume the oxygen gas is limiting.
Nitrogen dioxide, the dark brown gas, is created when nitric oxide, or "no no," mixes with oxygen gas. 8.0 g 8.0 g o o 2 o2 will react with if it is allowed to. This reaction generates 0.886 moles of NO2.
Can people produce gas?Both swallowing air and the large intestine's microorganisms aiding in food digestion cause you to produce gas. Food that is not digested travels from the small to the large bowel. When it arrives, the bacteria begin their work by producing hydrogen, carbon dioxide, or methane, which are subsequently expelled from your body.
Briefing
This reaction's chemical equation is:
2NO(g) + O2(g) → 2NO2(g)
In this limiting reagent reaction, 2 moles of NO reacts with one mole of O2 to produce 2 mole of 2NO2
0.886 mole of NO * (2 mole of NO2/2 mole of NO) = 0.886 mole of NO2
0.503 mole of O2 * (1 mole of NO2/1 mole of O2) = 1.01 mole of NO2
Hence, NO is the limiting reagent.
In this reaction 0.886 mole of NO2 is produced
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find the volume of 0.200 m sulfuric acid necessary to react completely with 79.7 g sodium hydroxide.;
Determine the number of moles of NaOH present, then the number of moles of H2SO4 required to react with 7.97 g of NaOH, and finally, write the correct balanced equation for the reaction. Lastly, determine how much H2SO4 is required to produce 0.25 moles of H2SO4.
How is a 2M H2SO4 solution made?you add 100 ml of concentrated H2SO4 to 900 ml of ordinary water. Once you've combined everything, you'll have 2 moles of H2SO4 in 1L of the solution, or 2M H2SO4.
How do you figure out how many grams you need to make a solution?1. To determine how many moles of NaCl you need, multiply the concentration (0.5 mols/Liters) by the desired volume of solution (0.5 Liters). 2. To determine how many grams of solute are required, multiply the moles of NaCl by their molar mass (58.44 g/mol).
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what prediction can be made about the entropy change during the proposed synthesis of solid nitrogen?
When S is negative, entropy falls The entropy change during the suggested synthesis of solid nitrogen can be predicted.
What is entropy, in the simplest possible terms?
Lower entropy can be viewed as an approximate measure of energy quality, with higher quality being associated with lower entropy. Lower entropy energy is structured for storage (the efficient library). Energy is chaotically stored in the random-pile library, which has a high entropy.
What Does Entropy Mean in Real Life?
Every aspect of daily life is impacted by entropy, which measures disorder. Actually, you might think of it as nature's tax. If left uncontrolled, disorder worsens over time. Chaos results from energy dissipation in systems. As something becomes more disorderly,
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what would most likely happen if m-cyclin is replaced by a nondegradable m-cyclin? group of answer choices
Cells would go into the M phase but not come out of mitosis n if m-cyclin is replaced by a nondegradable m-cyclin.
As the cell enters the M phase, notably during Metaphase-anaphase, M cyclin concentration starts to rise. When the nondegradable M-cyclin is present, after sister chromatid separation, it won't degrade and as a result, the cell will not exit the mitosis phase. This prevents the cell from entering the cytokinesis phase and causing the cell to exit the mitosis phase.
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if 0.75 g of a monoprotic weak acid required 22.50 ml of 0.510 m naoh to titrate it, what is the molar mass of the acid? select one: 86 g/mol 51 g/mol 65 g/mol 33 g/mol 153 g/mol
The molar mass of the acid: 65.36 g/mol
Calculate the molar mass of given acid?
Balanced chemical equation is:
HA + NaOH ---> NaA + H2O
let's calculate the mol of HA
volume , V = 22.5 mL
= 2.25×[tex]10^{-2}[/tex] L
using:
number of mol, n = Molarity×Volume
= 0.51×2.25×[tex]10^{-2}[/tex]
= 1.147×[tex]10^{-2}[/tex] mol
According to balanced equation:
mol of NaOH reacted = (1/1) × moles of HA
= (1/1)×1.147×[tex]10^{-2}[/tex]
= 1.147×[tex]10^{-2}[/tex] = number of moles of NaOH.
using:
number of mol = mass / molar mass
1.147×[tex]10^{-2}[/tex] mol = (0.75 g)/molar mass
molar mass = 65.36 g/mol
Therefore, The molar mass of the acid: 65.36 g/mol.
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What are the values of δs for the water, the surroundings, and the universe for the evaporation of water from an open pan at 25°c?.
The values of ∆S for the water, the surroundings, and the universe for the evaporation of water from an open pan at 25°C are positive, negative, positive.
The described system can be expressed as:
H₂O(l) ---------> H₂O(g)
Gases have a higher entropy than liquids, which in turn has a higher entropy than solids. The entropy of water increases when it transforms from a liquid to a gas (∆Swater is positive).
Endothermic phase changes need the supply of thermal energy from the environment, which means that the environment's entropy must drop (∆Ssurr must be negative).
The Second Law of Thermodynamics states that if a process is spontaneous—which water evaporation is—then ∆Suniverse > 0 must exist. (This implies that the liquid water's entropy growth must be greater than the environment's entropy drop.)
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explain how sulfur dioxide, as emitted by some power plants, ends up as sulfuric acid (h2so4), and sulfate ion (so42-) in rivers and lakes.
In air, sulfur dioxide reacts to form sulfur trioxide that further reacts with water to form sulfuric acid.
Much of the sulfuric acid withinside the air is shaped from sulfur dioxide launched whilst coal, oil, and fueloline are burned. The launched sulfur dioxide slowly paperwork sulfur trioxide, which reacts with water withinside the air to shape sulfuric acid. Sulfuric acid dissolves withinside the water in air and may continue to be suspended for various intervals of time; it's far eliminated from the air as rain.
Sulfuric acid in rain contributes to the formation of acid rain. Sulfuric acid in water separates to shape H+ andSO42-. The capacity of sulfuric acid to alternate the acidity of water is depending on the quantity of sulfuric acid and the capacity of different materials withinside the water to neutralize the hydrogen ions (buffering capacity).
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a compound contains 39.37% chromium, 38.10% oxygen, and potassium. what percentage of the compound is potassium
The percentage of the compound is potassium is 22.53 %.
given that :
compound contains percentage of chromium = 39.37 %
compound contains percentage of oxygen = 38.10 &
compound contains percentage of potassium = ?
compound contains percentage of potassium = - 100%
(percentage of chromium + percent of oxygen )
= 100 % - (39.37 % + 38.10 %)
= 100 % - 77.47 %
= 22.53 %
The percent of potassium in total percent of compound is 22.5 %.
Thus, a compound contains 39.37% chromium, 38.10% oxygen, and potassium. percentage of the compound is potassium is 22.53 %.
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10 g of methane (ch4) is combusted in a calorimeter that has an empty heat capacity of 18 j/°c. the calorimeter contained 150 g of water. if the temperature changed from 25.2 °c to 30.3 °c, calculate the molar heat of combustion of methane in j/mol.
The molar heat of the combustion of methane in j/mol is 5267.52 J/mol.
Given,
m = 10 g of CH₄
mol = mass/MW = 10/16 = 0.625 mol
C = 18 J/C
m = 150 g o water
dT = 30.3 - 25.5 = 4.8°C
Calculate molar combustion of methane,
calculate heat,
Q(empty) = C × dT = 18* (30.3-25.2) = 91.8 J
Q(water) = m × Cp(dT) = 150*4.184*(30.3-25.2) = 3200.76 J
Total q= 91.8 +3200.76 = 3292.2 J
This is done for 10 g of methane
Therefore,
If n = 0.625 present
Then,
H(rxn) = Q/n = 3292.2 / 0.625 = 5267.52 J/mol
Hence, the molar heat of the combustion of methane in j/mol is 5267.52 J/mol.
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Which of the following is true of zinc?
a. Grains are the most reliable food sources of zinc.
b. Excess zinc can decrease copper absorption.
c. All of its functions involve it acting as a cofactor for enzymes.
d. It binds to most proteins in the body.
True statement for zinc is option B: Excess zinc can decrease copper absorption.
Long-term and excessive zinc exposure decreases the amount of copper that is absorbed from the digestive tract and results in hypocupremia. Many crucial human enzymes, including superoxide dismutase, cytochrome-c oxidase, and ceruloplasmin, contain copper as a cofactor or coenzyme.
Even though the body only requires trace amounts of zinc, nearly 100 enzymes depend on it to perform essential chemical reactions. It plays a crucial role in the production of DNA, cell growth, the synthesis of proteins, the repair of damaged tissue, and the maintenance of a strong immune system.
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when two oxygen atoms form a chemical bond in a system, what happens to the energy and the stability of the system?
When two oxygen atoms form a chemical bond in a system its energy decreases and stability increases.
When two atoms join together to form a chemical bond, they either transfer or share electrons to create a new molecule. The negatively charged particles known as electrons are found in various energy levels around the atomic nucleus.
The outer electrons of two oxygen atoms are drawn in by the nuclei of both atoms when they are in close proximity to one another. Two electrons from each atom are shared in this situation. An example of this is a double bond. Each oxygen atom contains a total of eight valence electrons because they share two pairs of them. Its outer energy level is filled, providing it the most stable configuration of electrons. In its simplest form, oxygen is a diatomic molecule. Since each oxygen only contains six electrons, it must share them with another oxygen to form two bonds. An example of this is a double bond.
Thus, When two oxygen atoms form a chemical bond in a system its energy decreases and stability increases.
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draw the lewis structure for the polyatomic hydronium anion. be sure to include all resonance structures that satisfy the octet rule.
the lewis structure for the polyatomic hydronium cation is H₃O⁺.
The hydronium ion is written as :
H₃O⁺, to fulfil the octet rule there will be 8 valence electrons.
number of valence electrons are :
number of valence electron for 1st H atom = 1
number of valence electron for 2nd H atom = 1
number of valence electron 3rd H atom = 1
number of valence electron s for O = 6
the + sign show that there is loss of one electron, the more electronegative atom is Oxygen atom that means O atom is the central atom. therefore it has 8 valence electrons. the lewis structure is shown as below :
[ H - O : - H ]⁺
|
H
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the ground-state valence-shell configuration of a particular atom is 4d105s25p1. the element to which this atom belongs is a
The element to which this atom belongs is a p-block main-group element.
What is general electronic configuration?
Electronic configuration or general electron configuration or electronic structure of atoms or ions is the arrangement of orbital energy levels for s, p, d, and f-block elements of the periodic table.
Which group are p-block elements in the periodic table write the general electronic configuration of a p-block element?
Groups 13, 14, 15, 16, and 17 elements comprise the p-block elements. The general configuration of p-block elements is ns2np(1−6).
What is the general configuration of p- block elments?
The general electronic configuration of p-block elements is ns2np1-6 (Except Helium). The number of electrons in the p-block element's penultimate shell is either 2 or 8 or 18.
Therefore, the element belongs to the p-block.
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Fill in the missing curved arrows to show the preparation of this product from the hydrochlorination of a conjugated diene.
Then in part two select the common elementary steps.
missing curved arrows to show the preparation of this product from the hydrochlorination of a conjugated diene. Then in part two select the common elementary steps.
Two double bonds and a single bond are what distinguish conjugated diene. Conjugated diene, notably butadiene, play a crucial role in the creation of rubber and, consequently, in the creation of the tires on our automobiles. hydrochlorination In order to chlorinate an unsaturated hydrocarbon, hydrogen chloride must be added across its numerous bonds. Alkyne (triple-bonded) reactants are the focus of Johnson Matthey's DAVYTM hydrochlorination technology. A chlorinated alkene results from this exothermic reaction.
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which of the following statements are true? select all that apply. which of the following statements are true?select all that apply. the larger the atom, the more polarizable it is. in terms of the total attractive forces for a given substance, the contribution of dipole-dipole interactions, when present, are always larger than the contributions of dispersion forces. all other factors being the same, dispersion forces between linear molecules are greater than dispersion forces between molecules whose shapes are nearly spherical. when comparing ne and xe , the boiling point of ne is expected to be higher because dispersion forces decrease going down a column in the periodic table. for molecules with similar molecular weights, the dispersion forces become stronger as the molecules become more polarizable
The true statements are 1, 3, 4 and 5 for the properties of atom and molecules.
Define the term chemical bond?Atoms in molecules are held together by chemical bonds. Electrostatic forces between negatively charged electrons and positive charge atomic nuclei give rise to bonds.1. The statement is true:
Generally speaking, polarizability increases as electron volume increases. This happens in atoms because larger atoms have less firmly bound electrons compared to smaller atoms, which have more loosely held electrons. More polarizable than smaller atoms are larger molecules, atoms, or ions.2. The statement is false.
As we go down the group, the dispersion forces increases and they can be stronger than any other interactions.3. The statement is true.
In comparison to molecules with a linear shape, spherical molecules have less surface area and a lower dispersion force.4. The statement is true.
As the polarizable size of the molecules increases down the group, the boiling points also increase. As you move down the column of noble gases, their increasing diameters and resulting greater and greater London dispersion forces are apparent. The boiling point is set by these intermolecular interactions. The easier it is to separate the atoms, the smaller the force.5. The statement is true.
The dispersion forces get stronger when polarizability increases. As a result, molecules are more attracted to one another, and the melting and boiling points of covalent compounds increase with increasing molecular mass. Through the affected molecules' impacted molecules' molecular shapes, polarizability also affects dispersion forces.To learn more about chemical bonds visit:
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What is the frequency of a radio wave with an energy of 8.3x10^-24 J?
In the electromagnetic spectrum energy of waves is given by E=hυ , so the frequency of radio wave is 1.252×10¹⁰ s[tex]^-[/tex]¹.
What is electromagnetic spectrum?The electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
Here, the frequency of electromagnetic radiation is calculated as, υ=E/h
Substituting values in above equation gives, υ=8.34×10[tex]^-[/tex]²⁴/6.626×10[tex]^-[/tex]³⁴=1.252×10¹⁰ per second.
Hence, the frequency of radio wave is 1.252×10¹⁰ s[tex]^-[/tex]¹.
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16.3 l n2 at 25 °c and 125 kpa and 43.1 l o2 at 25 °c and 125 kpa were transferred to a tank with a volume of 5.25 l. what is the total pressure at 43 °c?
Its pressure distribution (in kpa) for 65 °C is P=13.32atm after 18.7 l n2 with 41. 9 l o2 and 25 °C and 125 kpa was transported to a container with such a capacity of 7. 00 l.
What is pressure and its types?A physical force applied to an object is known to as pressure. For unit area, a perpendicular force is delivered to a surface of the objects. T r is the fundamental formula for pressure. Phases of project are a unit of pressure (Pa). Absolute, ambient, differential, and gauge pressures are different types of pressure.
Briefing:That number of molecules of N2 is now determined
P₁.V₁=n₁.R.T₁
1.233×16.3=n₁×0.0821×298
n₁=0.822 mol
In a similar manner, we determine the quantity of O2 moles.
P₂.V₂=n₂.R.T₂
1.233×32.3=n₁×0.0821×298
n₂=1.628mol
The total number of moles of gas that must be pumped into the vessel with the dimensions of V = 4.50 L and T = 298 K equals
n=n₁+n₂
=0.822+1.628mol
=2.45mol
Let P represent the gas's final pressure,
PV=nRT
P×4.50=2.45×0.0821×298
P=13.32atm
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one of the differences between a voltaic cell and an electrolytic cell is that in an electrolytic cell: group of answer choices o2 gas is always produced at the cathode. a non-spontaneous reaction is forced to occur. only non-aqueous electrolyte solutions can be used. an electric current is produced by a chemical reaction. electron transfer does not occur. electrons flow towards the anode.
The key difference between voltaic and electrolytic cells is that in a voltaic cell, the flow of electrons is the result of a spontaneous redox reaction, whereas in an electrolytic cell, electrons are pushed by an outside power source, such as a battery.
In an electrolytic cell, The creation of electrical energy in this instance is caused by a spontaneous redox reaction. Electrical energy must be provided to start the redox reaction since it is not spontaneous. An external voltage in an electrolytic cell causes a current to flow through the cell, which in turn triggers a chemical reaction that is not spontaneous. The development of a spontaneous chemical reaction in a galvanic cell results in the passage of an electric current.
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what is the percent yield of hcl if 42.0 g of hcl are produced from the reaction of 62.0 g of pcl3? use percent yield equals startfraction actual yield over theoretical yield endfraction times 100.. 28.4% 72.8% 85.0% 93.5%
The percent yield of HCl is 85.0%.
In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.
%yield = (actual yield/theoretical yield) x 100
The presence of impurities lowers the actual yield, which lowers the percentage yield. The purity of the reactants influences the percentage yield. Highly pure reactants tend to increase actual yield and, as a result, percentage yield.
A percentage yield greater than 100 percent is only possible if the product is contaminated with impurities or if all of the solvent from the reaction mixture has not been dried off.
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ammonium nitrate decomposes explosively upon heating according to the following balanced equation: 2nh4no3(s)→2n2(g) o2(g) 4h2o(g) part a calculate the total volume of gas (at 135 ∘c and 769 mmhg ) produced by the complete decomposition of 1.59 kg of ammonium nitrate.
The answer is 1687.74 L.
Solution:
PV = nRT
Divide both sides by P
V = nRT / P
V = (68.25 × 62.363 × 297) / 749
V = 1687.74 L.
Heating ammonium nitrate NH4NO3 produces nitrous oxide N2O and water H2O. The above equation is the balanced chemical reaction for the decomposition of ammonium nitrate when heated. 1 mol of ammonium nitrate breaks down into 1 mol of nitrous oxide and 2 mol of water molecules.
As mentioned earlier, potassium nitrate decomposes into metallic nitrites and oxygen gas. Potassium nitrate can be said to not produce nitrogen dioxide when heated. However, at sufficiently high temperatures, ammonium nitrate itself can violently decompose. This process produces gases such as nitrogen oxides and water vapor. It is this rapid release of gas that causes the explosion.
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what is the minimum change of entropy that occurs in 0.200 kg of ice at 273 k when 7.40 x 104 j of heat is added so that it melts to water?
The gas's change in entropy is 243.42J/K, which is less than the minimal change in entropy that occurs when 7.40 x 104 j of heat are injected to melt 0.200 kg of ice at 273 k.
Entropy: What Does It Mean in Life?
Every aspect of daily life is impacted by entropy, a measure of chaos. Actually, you might think of it as nature's tax. If left uncontrolled, disorder worsens over time. Chaos results from energy dissipation in systems. The more disorderly something is, the more entropic it is in our eyes.
What's an illustration of entropy?
Ice melting is the ideal illustration of entropy. The individual molecules are arranged and fixed as ice. When ice melts, its molecules change to
Briefing:
ΔH=mL
ΔH=0.200*333000
=66600J
ΔS=ΔH/T
=66600/273.15
=243.42J/K
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when the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are: sulfuric acid (aq) calcium hydroxide (s) calcium sulfate (s) water (l)
when the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are 1,1,1,1.
Simple terms like "balanced equation" might also refer to a chemical equation. Any ionic substances or acids are denoted in a molecular equation by their chemical formulae as neutral substances. In parentheses following the formula, each substance's state is listed. In a molecular equation, the ionic compounds are stated as molecules rather than as individual ions, resulting in a balanced chemical equation.
In a chemical equation, each molecular formula is preceded by an integer coefficient that represents the quantity of each molecule that is generated or reacted, and it is used to calculate the reaction or production rates of molecules. All of the atoms in a formula are multiplied by the integer coefficients, which are the numbers put in front of equations to balance them.
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combustion reaction released 85.0 kj when one gram of a reactant was burned. how much of this mass was lost in the process? report your answer to 3 significant figures.
The amount of mass which is lost in the given process is 9.458 x 10^-10g using Einstein's equation.
The famous Einstein's equation given by E= m^c2, was proposed by German-born physicist Albert Einstein based on his theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other. Although it is not usually used, Einstein's equation, E = mc2 applies to chemical reactions and nuclear reactions. According to the provided data,
E = 85 kj = 85000j = 85000 kilogram-meters^2/second^2 (where 1 joule = 1 kilogram-meter^2/second^2)
c = speed of light = 299 792 458 m / s
Hence, using the Einstein equation:
E = mc^2
85000 = m * (299792458) ^2
m = 9.458 x 10^-13 kg = 9.458 x 10^-10 g
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if an orbital in the 2p subshell is completely filled before each orbital in the 2p subshell is partially filled, it is a violation of which rule?
If an orbital in the 2p subshell is completely filled before each orbital in the 2p subshell is partially filled, it is a violation of Hund's rule.
Every atomic orbital within a sublevel is singly occupied before it is doubly occupied, and all singly occupied orbitals have electrons with the same spin, according to Hund's Rule of Maximum Multiplicity, also known as Hund's Rule. Before pairing up with another electron in the same orbital, electrons will always occupy their own suborbital. When drawing molecular orbital diagrams and electron configurations, this rule is helpful. When applying Hund's Rule, pairing electrons twice before it is necessary is the most frequent error made. Electrons should not be paired when filling out p orbitals until each suborbital has one electron.
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what is the structure of benzene? what are the different ways in which this structure is represented
The aromatic compound benzene, with the chemical formula C6H6, is one of the most well-known ones.
Benzene has a mass average of roughly 78.112, and its chemical formula is C6H6, meaning it comprises six carbon atoms and six hydrogen atoms. Three double bonds and a six-carbon ring, symbolized by a hexagon, are present in the structure. A corner that is bonded to other atoms represents the carbon atoms.
Structure of Benzene
Benzene is typically depicted structurally as a six-carbon ring with three double bonds (shown by a hexagon). Every carbon atom that a corner represents is also connected to one other atom. These are hydrogen atoms that are present in benzene. We can identify the arrangement as including conjugated double bonds since the double bonds are separated by single bonds.
An alternative representation of the six pi electrons employs a circle inside a hexagon. These symbols all have positive and negative qualities. The three double bond symbol will be used simply because it is frequently used in the text.
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discuss the equilibrium that eventually results if a solid is placed in an initially evacuated closed container and is maintained at a given temperature
The equilibrium that eventually results if a solid is placed in an initially evacuated closed container and is maintained at a given temperature: Thermal equilibrium exists because the solid attains the temperature.
Equilibrium does no longer necessarily imply that reactants and merchandise are present in the same amounts. It approaches that the response has reached a factor in which the concentrations of the reactant and product are unchanging with time due to the fact the ahead and backward reactions have identical charges.
The equilibrium rule says that if a system is in equilibrium then the sum of all of the forces or the net pressure appearing at the machine is 0 due to which the system does now not reveal any linear acceleration and stays at relaxation or moves with a steady velocity. we can write it down as ∑F=zero.
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If exactly one molecule of solute is present in 1. 00 l of solution, what is the concentration of the solution?.
If 1.0 l of solution contains exactly 1 molecule of the solute. The concentration in the solution is 1.66x10-24 M.
What does concentration mean in science?The quantity of a substance, like salt, that is present in a specific volume of tissues or liquid, like blood, according to science. When there is less water present, the material becomes more concentrated. For instance, when a person will not really drink enough water, the concentration of salt in their urine may increase.
Why is it vital to concentrate?Why is it so crucial to focus? You can use your resources more effectively and address difficulties more effectively when you are focused. It is less probable that you would overlook crucial facts when you are focused. Maintaining focus makes it easier for you to recall information.
Briefing:1 mole = 6.02x10^23 particles,
((1 mole)/(6.02x10^23 molecules))
(1 molecule)/((1 mole)/(6.02x10^23 molecules))
= 1.66x10^-24 moles
=1.66x10^-24 moles/ volume,
= 1.0L here:
=(1.66x10^-24 moles solute)/(1.0 Liter)
= 1.66x10^-24 molar,
= 1.66x10^-24 M
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i. determine the mass of reactants and products that will be needed if one mole of p4(s) reacts completely, as follows p4(s) 6 h2(g) →4 ph3(g) ii. what is the total mass of the reactants? what is the mass of the products? iii. what principle is illustrated by this example?
one mole of P4 react with 6 mole of hydrogen to form 4 moles of phosphine. The mass of reactant is 132g ( 30 x 4 + 6 x 2). The mass of product is 132g (4 x33). This justify law of conservation of mass.
The class of chemicals known as organophosphorus compounds includes phosphonate. Philippe Gengembre initially discovered this chemical in the year 1783. By heating up phosphorus in an aqueous solution of potassium carbonate, he was able to produce phosphine. This substance has the chemical formula PH3. This substance is present in the atmosphere in varying concentrations. It is essential to the biochemical cycle of phosphorus.
Hence, phosphine is produced from phosphorous and hydrogen.
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if g of methane were burned in the presence of excess oxygen gas, what is the maximum energy change that occurs? state whether the heat is released or absorbed in the reaction.
The maximum energy change that occurs when one mole of methane (CH₄) is burned in the presence of excess oxygen gas (O₂) is 890 kJ. This heat is released in the reaction.
The reaction that occurs when methane is burned in the presence of excess oxygen is as follows:
CH₄ + 2O₂ -----> CO₂ + 2H₂O
The maximum energy change that occurs is the enthalpy of the reaction (ΔH). The enthalpy of reaction is the difference between the enthalpies of the reactants and the enthalpies of the products.
In this reaction, the enthalpy of the reaction is equal to the enthalpy of combustion of methane (ΔHcomb CH₄ ) minus the enthalpy of the formation of carbon dioxide and water (ΔHf CO₂ + 2H₂O).
The enthalpy of combustion of methane is 890 kJ/mol. The enthalpy of the formation of carbon dioxide and water is -890 kJ/mol.
Therefore, the enthalpy of reaction for this reaction is 890 kJ/mol. This means that 890 kJ of heat is released when one mole of methane is burned in the presence of excess oxygen.
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