Sampling is the process of choosing the group from from which you'll actually collect data for your study.
What does chemical research entail?Chemistry undergraduate research is independent experimentation carried out under the direction and supervision of something like a mentor or adviser. In an ongoing study project, students look at topics that interest them and their adviser. The chemical sciences cover a wide range of subject areas.
What kinds of research are there in chemistry?Modern chemistry research may be divided into two categories: pure and applied. Pure chemistry researchers work primarily to improve human knowledge of chemistry. Greater comprehension of the ideas behind how matter changes during chemical reactions is what pure chemistry is all about.
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which of the following is the correct mechanism for the sn2 reaction that occurs when chlorocyclohexane is treated with a cyanide ion?
Sn2 reaction is a reaction which is known to be nucleophilic. This reaction occurs step by step and is a type of substitution reaction.
In Sn2 reaction a lone pair from the nucleophile attacks on a place of electron deficiency.
This reaction follows a second order kinetics. It is single step reaction and both bond forming and breaking will occur at the same time.
The chlorocyclohexane is a single bonded hexane structure.
It has Cl on the ortho position.
Cyanide is a triple bonded structure, sharing a triple bond between the C and N. It also has 2 lone pairs and a negative charge on C.
When we react these two compounds then after the Sn2 reaction, we get a new structure called cyno-cyclohexane. In this reaction, the cyanide will attack at ortho place replacing Cl with CN and Cl will be released.
Therefore, in this Sn2 reaction, the new compound formed will be cyno-cyclo-hexane.
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a 2.20 sample of the of the diprotic acid h2x reacts completely with 44.2 ml of 0.450 m naoh solution. what is the molar mass of h2x?
The molar mass of h2x is 222.22 g/mol
H2X + 2NaOH → Na2X + 2H2O
Mole NaOH = concentration × volume
= 0.450 × 44.2 × [tex]10^{-3}[/tex]
= 0.01989mol
Mole H2X = 0.01989 / 2 = 0.0099mol
H2X and NaOH has 1 : 2 molar ratio
Molar mass = mass / mole =2.20/0.0099 = 222.22 g/mol
A chemical compound's molar mass is calculated by dividing its mass by the number of moles measured in moles that make up the sample of that compound. In contrast to molecular properties, a substance's molar mass is a bulk property. The comp0und is present in many different forms, each with a different mass as a result of the isotopes. The mlar mass represents the average of these masses. The molar mass is most frequently calculated from the standard atomic weights and is a function of the relative abundance of the constituent atoms' isotopes on Earth. It is thus a terrestrial average. The conversion betwen a substance's mass and amount can be done using the molar mass.
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xwhich substance is a colloid? multiple choice mayonnaise iced tea milk of magnesia gasoline italian salad dressing
When two or more substances are mixed together but not chemically combined, the result is a colloid ( they can be separated ).
What is a colloid ?They are a unique kind of mixture in which minuscule amounts of one component are dispersed throughout another. Due to the fact that cream is made up of minute fat particles suspended in water, it is a colloid.A colloid is made up of smaller particles than a suspension.When cream is shaken vigorously for 10 minutes, the fat molecules bind together to form butter and buttermilk. Due to the water molecules that are entrapped between the fat molecules in butter, it is also a colloid.Butter and buttermilk are created when cream is separated.Examples of Colloids Milk, CreamThe proteins in the egg yolk stabilize the oil and water mixture that makes mayonnaise. This particular colloid is an emulsion.A colloid is a mixture made up of two or more substances that have been mingled but not chemically combined.Blood : An emulsion is a specific kind of colloid made up of a mixture of two liquids that creates a stable substance with different physical properties from the two individual liquids.Colloids can be composed of solid-liquid, solid-gas, liquid-liquid, gas-liquid, or gas-liquid combinations.To Learn more About colloid refer to:
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What are the 5 steps to prevent a fire?.
The 5 steps to prevent a fire are
Unplug any devices you aren't using:Check the Smoke Alarms.Lawn clippings and other flammable items should be kept in secure locations.Pets should be kept indoors.Examine the wiring and appliances in your home.These are actions and procedures designed to prevent and put out destructive fires. Anywhere a fire can start, so it's critical to always be prepared for what to do if one breaks out inside your house. Likewise, it's equally crucial to consider all of the ways in which you can stop one from occurring in the first place.
Hence, simple step of fire prevention works on minor levels.
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A chemist measures the energy change Delta H during the following 2Fe2O3(s)->4FeO(s)+O2(g). 1)this reactions is: Endothermic or exothermic.2) suppose 94.2g of Fe2O3 react. will any heat be relased or absorbed. yes absorbed. yes releases. no.3) If you said heat will be released or absorbed in the second part of the question. calculate how much heat will be absored or released. be sure your answer has correct number of significant digits.
1) This is an endothermic process
2) Heat can be absorbed, certainly.
3) Take into account the ensuing thermochemical equation.
4 FeO(s) + O2 from 2 Fe2O3(s) (g) ΔH = 560 kJ
The process is endothermic because H > 0.
We can determine the relationships shown below.
The reaction between two moles of Fe2O3 absorbs 560 kJ.
Fe2O3 has a molar mass of 160 g/mol.
Let's say that 94.2 g of Fe2O3 react. Heat that is taken in is:
94.2g.(1mol/160g). (2mol/560kJ) = 164.85kJ
What distinguishes one from the other?Exothermic refers to chemical reactions that release energy. When bonds are created in the products of exothermic processes, more energy is produced than is required to break the bonds between the reactants. Endothermic refers to chemical reactions that either use or absorb energy.
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Enter a balanced chemical equation for the reaction of aqueous potassium hydroxide with aqueous copper(II) chloride to form solid copper(II) hydroxide and aqueous potassium chloride.
Express your answer as a chemical equation. Identify all of the phases in your answer.
CuCl₂₍aq₎ + 2KOH₍aq₎ ⇒ Cu(OH)₂₍s₎ + 2 KCl₍aq₎
Above reaction is an example of precipitation reaction, in which Cu(OH)₂ is the formed precipitate.
What is precipitation reaction?In aqueous solution, precipitation is the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution. The solid formed is the precipitate.
Precipitation reactions are usually double displacement reactions involving the productions of a solid form residue. Precipitate is formed when cations and anions in aqueous solution combine.
What are the reactants used?CuCl₂ : Its appearance is yellow-brown solid
KOH : Potassium hydroxide, its appearance is white solid deliquescent, etc,.
What are the products formed?Cu (OH)₂ : Its appearance is blue or blue-green solid
KCl : potassium chloride and sylvite , its appearance is white crystalline solid and colorless hygroscopic crystals.
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What are some examples of chemical exposure?.
Water exposure can happen when someone drinks polluted subsoil and surface water, or ingests it unintentionally while swimming or taking a shower.
How long do contaminants stay within the body?After exposure, some substances quickly leave the body. Others might persist for a long period in fats, blood, or bones. For instance, if a person has been exposed to arsenic just once, it typically only persists inside the body for 3 days. Other substances, like the insecticide DDT, can linger inside the body for up to 50 years.
What causes exposure to chemicals?Exposed: A chemical can only harm your health if it comes into touch with or enters your body. Exposure routes: A chemical can be exposed through eating, inhalation, or direct contact.
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Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does not contain an error. Select one: a. n = 3,1 = 2, ml = +3 b. n = 4, 1 = 0, ml = -1 c. n = 3, 1 = 1, ml = -2 d. n = 4,1 = 4, ml = 0 e. n = 5,1 = 3, ml = -3
The quantum numbers does not contain an error is n = 5, l = 3, ml =-3 .
What is meant by quantum numbers ?Quantum numbers in quantum physics and chemistry explain the values of conserved quantities in a quantum system's dynamics. Quantum numbers are quantities that may be precisely known together with the energy of the system and their corresponding eigenspaces. They correspond to the eigenvalues of operators that transact with the Hamiltonian. A base state of a quantum system is fully described by the specification of all of its quantum numbers, which may theoretically be measured collectively.The quantization of several interesting observable quantities is a crucial component of quantum physics. This specifically results in quantum numbers, though they may occasionally approach infinity, that take values in discrete sets of integers or half-integers.Learn more about quantum numbers refer to :
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What would be the limiting reactant in the reaction if 1 mole of oxygen gas and 1 mole of ethanol.
The reaction between 1 mole of oxygen gas and 1 mole of ethanol has oxygen gas (O2) as the limiting reactant.
equilibrium equation
2CO2 + 3H2O > CH3CH2OH + 3O2
Three moles of oxygen (O2) and one mole of CH3CH2OH (from the previous equation) interacted.
Three moles of O2 and one mole of CH3CH2OH reacted from the above balanced equation.
As a result, 1 mole of O2 will react with 0.33 moles of CH3CH2OH (1/3)
From the preceding calculation, we can see that just 0.33 moles of the given 1 mole of CH3CH2OH are required for a complete reaction with 1 mole of O2.
O2 is the limiting reactant as a result.
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The complete question is
CH3CH2OH + 302 → 2002 + 3H20
What would be the limiting reactant in the reaction if 1 mole of
oxygen gas and 1 mole of ethanol (CH3CH2OH) reacted with
each other?
How long should the food worker label chicken salad?.
the food worker label chicken salad as three days old according to the example given below.
In this case, the food worker should label the food as three days old. This is because food in the food industry must be labelled with the date of the oldest cooked ingredient. It would be the chicken in this case. When foods are unfrozen or cooked, microorganisms begin to grow on the surface and enzyme activity increases. This accelerates the rate at which the food spoils. According to the CDC, chicken is safe to eat up to four days after it has been cooked.
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What energy is used in melting?.
Answer:
The energy used in melting is heat energy.
which of the following statements correctly describe resonance structures? select all that apply.
Molecules that require more than one inwis structure to accurately describe them.
The actual molecule is an average of the Lewis structure.
Moleculos that change back and forth between several different forms Molecules that spin so that double bends paint in ditferent dircctions
Molecules that react with other molecuies and form a hybrid
The statements correctly describe resonance structures is The actual molecule is an average of the Lewis structure. Therefore, option B is correct.
What is Lewis structure ?The representations known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
The electronic bonding of a single polyatomic species, including fractional bonds and fractional charges, is described by resonance structures, which are a collection of two or more Lewis structures.
In comparison to separate resonance structures, the resonance hybrid is more stable. The movement of a charge between two or more atoms is frequently represented by resonance structures. These atoms have a more evenly distributed charge, which makes it more stable.
Thus, option B is correct.
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europium-151 has an abundance of 48.03% and europium-153 has an abundance of 51.97%. what is the average atomic mass of europium?
The average atomic mass of Europium is 152.04u where europium 151 has abundance of 48.03% and europium 153 has abundance of 51.97% .
There are two isotopes of naturally occurring europium(Eu).These are europium 151 and europium 153.Europium 151 is more stable isitope among the isotopes. Europium-151 has an abundance of 48.03% and Europium-153 has an abundance of 51.97%.We can calculate the abundance by calculating average atomic mass using atomic mass of each isotopes and their percentage abundance dividing each percentage abundance by 100 to convert in a decimal form .then multiply the value by atomic mass of the isotopes.
Atomic Mass of Europium-151 is 151u.
The percentage abundance of Europium-151 = 48.03%
The fractional abundance of Europium-151 = 0.4803.
Mass of Europium-153 is 153 u.
The percentage abundance of Europium-153 = 51.97%
The fractional abundance of Europium-153 = 0.5197
The atomic mass of Europium= Mass of isotope . Fractional abundance of isotopes
so putting the values we get,
Average Atomic mass of europium = (151u . 0.4803) + (153u . 0.5197)
= 152.04u
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Europium-151 has an abundance of 48.03% and europium-153 has an abundance of 51.97% the average atomic mass of europium is 200.
Assume which you have ten thousand atoms of Eu.Then you've got got 4803 atoms of 63151 Eu and 5197 atoms of 63153 Eu.Mass of 63151 Eu=4803×151u=725 253 uMass of 63153 Eu=5197×153u=795 141 uMass of ten thousand toms =1 520 394 u.Average mass = 100001520394u =152 u.Method 263151 Eu:48.03%×151 u=72.5353 u63153 Eu:51.97%×153 u=79.5141 uTotal="152.0394 u"=152 u.Note: In each methods, the solution for hundreds of the 2 isotopes.
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Why is there no liquid metallic hydrogen zone in the interiors of uranus or neptune?.
Two answers. Pressure and they're not big enough.
Now, you see, in order for hydrogen to be metallic, the interiors of Uranus and Neptune would have to have more pressure.
Pressure can be defined as the exertion of force upon a surface by an object, fluid, etc., in contact with it.
The three states of matter on Earth are solid, liquid, and gas. An element's shape is determined by its temperature and pressure. On Earth, hydrogen is generally a gas, but it may be intentionally cooled and compressed to change its state into a liquid or a solid. Hydrogen is still a non-metal even in these states; since its atoms strongly cling on to their electrons, it has poor electrical and thermal conductivity. Contrarily, metals have good electrical and thermal conductivity due to the arrangement of their atoms, which forms a lattice that makes it simple for the outermost electrons of one atom to go to another.
Jupiter and Saturn are the two gas giants in our solar system. Based on their densities, both planets have a considerable amount of hydrogen in them. However, the hydrogen in these giants is heated and compressed to such high temperatures and pressures that it assumes a number of peculiar phases, including liquid metallic hydrogen. Hydrogen, as I previously stated, is a non-metal. However, in Jupiter and Saturn, the extreme temperatures and pressures cause hydrogen atoms to lose their electrons, resulting in a stew of free-floating hydrogen nuclei (protons) and electrons. The ability of the electrons to travel freely between the nuclei due to their unbound state is a characteristic of metals. This is metallic hydrogen, which has a metallic-like behavior. Metallic hydrogen is conductive and is thought to play a significant role in the dynamo that drives the magnetic fields of Jupiter and Saturn. (However, the dynamo on Earth is propelled by liquid iron, a real metal.)
The ice giants of our solar system, Uranus and Neptune, are too dense for hydrogen to make up a significant portion of their composition. In addition, because of how similar their masses are, planetary scientists presume that the innards of these two planets are comparable and that hydrogen makes up just around 15% of their masses. Although hydrogen is thought to form a liquid molecular shell deeper into Uranus and Neptune and is present in their atmospheres, it never experiences the pressures and temperatures necessary to transform into metallic hydrogen.
Thanks.
an increased anion gap would be consistent with which of the following? the body has a net neutral charge, but the anions we measure have been replaced by anions other than cl- and hco3-. the body has a net neutral charge, but the cations we measure have been replaced by cations other than na and k . there are now more anionic equivalents than cationic equivalents, and the body has a net negative charge. there are now more cationic equivalents than anionic equivalents, and the body has a net positive charge.
Usually, an increased or normal anion gap metabolic acidosis results from too much acid and/or too little base.
Which of the following conditions will result in a larger anion gap?In patients with acidosis, lactic acidosis, diabetic ketoacidosis, uremic acidosis, ethylene glycol poisoning, and laboratory mistake are the most frequent causes of an elevated anion gap.
What exactly does having a high anion gap mean?The anion gap quantifies the space between your blood's positively and negatively charged electrolytes. Your blood is more acidic than usual if the anion gap is too high. If the anion gap is too small, your blood's acidity is insufficient.
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how many alkene products, including e,z isomers, might be obtained by dehydration of 3-methyl-3-hexanol with aqueous sulfuric acid?
Five alkene products, By dehydrating 3-methyl-3-hexanol, five alkene compounds are attainable.
What are alkenes' products?Alkenes can interact with various chemical kinds in addition reactions.
For instance:
hydrogen + propane = propane.For instance, butene + water yields butanol.An alkene may receive the addition of chlorine, bromine, or iodine. Usually, these responses are unplanned. ...Dichloroethane is created by adding chlorine to ethane.Iodine with ethene produce diiodoethane.Alkenes are a group of unsaturated hydrocarbons (i.e., molecules with solely carbon and hydrogen) that include at least one double bond from carbon to carbon. Olefins is a different name for alkenes. Due to the double bond, alkenes are more reactive than alkanes.
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n the dilution of 10.0 ml of a 0.10 m solution of hcl to a volume of 20.0 ml, what remains unchanged?
The mass of the HCl present does not chnage.
What remans constant in the solution?We know that dilution has to do with the process by which we add more solvent to the solution. In many cases, the solvent that is added is water. When we want to dilute the HCl from 0.10 M, all we need to do is to add an additional 10 mL of water so that the volume becomes 20 mL.
In all these, the mass of the HCl in the solution did not change. It is only the mass of water in the system that has increased as the solution was now made to become more dilute.
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What is Marxism theory?.
Marxism is just a social, political, & economic ideology that emphasizes the conflict between capitalists and also the working class. It was developed by Karl Marx.
What is a political party, exactly?A broad coalition that arranges candidates to run in elections in a certain nation. It is typical for party members to share similar political viewpoints, and parties may support particular ideologies or policy objectives.
What does it mean to have a political issue?The course manual for Global Politics defines a political issue as "any question that deals with just how power is allocated and how much it operates inside social organization, as well as how individuals think about and engage in their communities and the larger globe on matters that influence their lives."
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The difference between the actual level of activity and the standard activity allowed for the actual output x the variable part of the predetermined overhead rate is the variable overhead ____________ variance.
The difference between the actual level of activity and the standard activity allowed for the actual output x the variable part of the predetermined overhead rate is the variable overhead efficiency variance.
What is standard activity?
Standard activity is defined as a quantifiable amount of a certain role or function played by a biological entity in a biophysical process, biochemical reaction, or biochemical process that is comparable to the level of activity displayed by the same biological entity in the majority of healthy people in a reference group.
Efficiency variance is defined as the discrepancy between the actual number of inputs used and the theoretical number of inputs needed to produce a unit of output. Based on models or prior experiences, the expected inputs to generate the unit of output are predicted.
Thus, the difference between the actual level of activity and the standard activity allowed for the actual output x the variable part of the predetermined overhead rate is the variable overhead efficiency variance.
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Suppose 3.62g of barium nitrate is dissolved in 350. mL of a 71.0mM aqueous solution of sodium chromate. Calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium nitrate is dissolved in it. Round your answer to 3 significant digits.Solving limiting reactant problems in solution Suppose 3.62 g of barium nitrate is dissolved in 350 mL of a 71.0 m M aqueous solution of sodium chromate. Calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium nitrate is dissolved in it. Round your answer to 3 significant digits. OM х 5 2 ? Explanation Check
Molar concentration of barium cations in solution of3 .62g of barium nitrate is dissolved in 350. mL of a 71.0mM aqueous solution of sodium chromate is 0.039M
Molar concetration of barium cation can be calculate as follows:
first we should make balanced equation
Ba(NO₃)₂(aq) + Na₂CrO₄(aq) → BaCrO₄(s) + 2NaNO₃(aq)
while,
Mass of barium nitrate = 3.62 grams
Volume of 0.071 M sodium chromate 350 mL
Then we can calculate the number of moles of Ba(NO₃)₂
mole = mass / molar mass
Moles = 3.62 grams / 261.34 grams/mole
Moles = 0.0138 Moles
Then, calculate the number of moles of Na₂CrO₄
moles = molarity * volume
moles Na2CrO4 = 0.071 * 0.35 liters
mol Na2CrO4 = 0.0248 mol
so, we can calculate limiting reactants
Since Na₂CrO₄ is in excess, all Ba(NO₃)₂ is consumed and reacts to BaCrO₄ in the form of Ba²⁺.
then we can calculate the number of moles of Ba²⁺
nBa²⁺=n(BaCrO₄) =n(Ba(NO₃)₂) = 0.0138 Moles
then calculate Ba²⁺ Molarity
C=n/v,
C(Ba²⁺)=0.0138 Moles/0.350 = 0.039M
therefore, Molar concentration of barium cations in solution is 0.039M
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why is it necessary to indicate the state (s, i, g, aq) of products and reactants when writing a thermochemical equation?
In a thermochemical equation, the reactants' and products' physical states must be taken into account because they affect the value of H. In the course of an endothermic reaction, the environment provides energy.
What is Thermochemical Equations?The only difference between thermochemical equations and other balanced equations is that they also indicate the heat flow for the reaction. The equation's right side includes a list of the heat flow denoted by the letter H.Kilojoules, or kJ, are the most widely used units. Two thermochemical equations are provided here:H2 (g) + ½ O2 (g) → H2O (l); ΔH = -285.8 kJ
HgO (s) → Hg (l) + ½ O2 (g); ΔH = +90.7 kJ
The enthalpy of a substance depends upon temperature. Ideally, you should specify the temperature at which a reaction is carried out. When you look at a table of heats of formation, notice that the temperature of the ΔH is given. For homework problems, and unless otherwise specified, the temperature is assumed to be 25°C. In the real world, the temperature may be different and thermochemical calculations can be more difficult.A substance's enthalpy is temperature-dependent. The ideal situation would be to state the temperature at which a reaction occurs. Observe that the temperature of the H is mentioned in a table of formation temperatures. The temperature is assumed to be 25°C for homework problems unless otherwise stated. Calculations involving thermochemistry may be more challenging in the real world due to temperature variations.To Learn more about thermochemical equation refer to:
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What does you sound like you are somnolent mean?.
somnolence mean you're feeling sleepy or drowsy.
Informally referred to as food coma, postprandial sleep, the after-dinner dip, or the itis[1] in African-American Vernacular English, somnolence is a common state of sluggishness or lethargy after a meal. Postprandial somnolence consists of two parts: a general state of low energy associated with activation of the parasympathetic nervous system in response to mass in the gastrointestinal tract, and a specific state of sleepiness.[2] While there are many theories explaining this behavior, including decreased blood flow to the brain, neurohormonal modulation of sleep through digestive coupled signaling, or vagal stimulation, very few have been explicitly tested. Human studies have only hazily looked at postprandial sleep behavior so far, showing probable changes in EEG spectra and self-reported sleepiness[3]. The only clear animal study on postprandial sleep behavior so far is that of the rat.
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select all the statements that describe the reaction of water with an alkyne in the presence of an acid catalyst. multiple select question. the enol form of the product is more stable than the keto form.
Statements that describe the reaction of water with an alkyne in the presence of an acid catalyst include :
* The ketone form of the product is more stable than the enol form.
* The initial product of the reaction is an enol.
* The enol tautomerizes to form a ketone.
* HgSO4 is used as an additional catalyst in this reaction.
A catalyst is a substance that accelerates a chemical response or lowers the temperature or pressure needed to begin one, without itself being consumed in the course of the reaction.
Catalysts speed up a chemical reaction by means of reducing the amount of power you need to get one going. Catalysis is the backbone of many business tactics, which use chemical reactions to turn raw materials into beneficial products.
Catalysts may be labeled as homogeneous, heterogeneous, or enzymatic. Homogeneous catalysts exist within the identical phase because of the reactants, whereas heterogeneous catalysts exist in a specific phase than the reactants.
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Draw the line-angle formula for the ester formed from one molecule of terephthalic acid and one molecule of ethylene glycol.
Ethylene glycol and terephthalic acid undergo condensation polymerisation with the elimination of water (H20) molecule. Elimination of water forms ester bond between these two molecule.
Dacron or terylene is a type of polyester. Which is formed by the condensation polymerization. Ethylene glycol and terephthalic acid undergo condensation polymerisation with the elimination of water (H20) molecule. Elimination of water forms ester bond between these two molecule.
Since, terephthalic acid contains -COOH (acidic group) and ethylene glycol contains -OH (alcoholic group).
The reaction takes place at a temperature range of 420 - 460 K. This reaction occur in presence of zinc acetate and antimony trioxide as a catalyst.
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How do you check a radical equation?.
On one end of the equation, isolate any of the radical terms. Increase all sides of the equation by the index's power. Exist any new radicals? In that case, resolve the new equation.
What is a radical instance?, is a prominent illustration of a radical. Three-electron molecules like triplet oxygen and triplet carbene (CH. 2) are two more examples. There are numerous techniques to produce radicals, but most commonly, redox processes are used.
What constitutes radical beliefs?Radical politics refers to the desire to modify or supplant the core values and standards or political system, frequently through social transformation, structural change, revolution, or radical reform. Radicalization is the process of embracing extreme viewpoints.
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Because electron delocalization stabilizes a compound, if the only way electrons can be moved is away from the most atom, that is better than no electron delocalization at all. Place appropriate curved arrows form the ones provided showing the direction of electron flow. More than one arrow can be used for one structure. Drag the appropriate arrows onto their respective targets. Targets may be left blank. The approximate structures, which can be depicted using curved arrows to show the movement of delocalized electrons, are called resonance contributors. Draw curved arrows to indicate how each resonance contributor leads to the next for the molecule shown. Edit the reaction by drawing electron flow arrows where needed. Electron flow arrows should start on an atom or a bond and should end on an atom, bond, or location where a new bond should be created.
Because electron delocalization stabilizes a compound, if the only way electrons can be moved is away from the most atom, that is better than no electron delocalization at all this is false.
The electron delocalization stabilizes the electron so it is necessary to have electron delocalization. the electron delocalize because it spreads the energy over the large area. the electrons present are the charges which brings the extras stability.
Thus, Because electron delocalization stabilizes a compound, if the only way electrons can be moved is away from the most atom, that is better than no electron delocalization at all this is false.
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using the vsepr model, the electron-domain geometry of the central atom in clo3- is . question 34 options: a) linear b) trigonal planar c) tetrahedral d) trigonal bipyramidal e) octahedral
The VSEPR theory states that the ClO3 ion's pyramidal geometry results from the presence of one lone pair and three bond pairs, which cause sp3 hybridization.
What is VSPER Theory?
From the electron pairs that surround the core atoms of the molecule, the VSEPR theory is utilised to predict the shape of the molecules. Sidgwick and Powell initially introduced the theory in 1940. The VSEPR theory is predicated on the idea that the molecule will adopt a form that minimises electronic repulsion in that atom's valence shell.
The VSEPR hypothesis, also known as the "Valence Shell Electron Pair Repulsion Theory," is based on the idea that all atoms have a repulsion between their pairs of valence electrons,
The valence shell electron pair repulsion (VSEPR) theory is a model that predicts the 3-D form of molecules based on the amount of valence shell electron bond pairs that exist between the atoms in a molecule or ion. This theory predicts that electron couples will arrange themselves to minimise the effects of their mutual repulsion. The electron pairs are, to put it another way, as far apart as they can be.
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agno3(aq)agno3(aq) and nacl(aq)nacl(aq) express your answer as a chemical equation. identify all of the phases in your answer. enter noreaction if no precipitate is formed.
The reaction between AgNO₃ and NaCl forms AgCl and NaNO₃. The balanced chemical equation for the above reaction is given as:
AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)
The reaction between AgNO₃ and NaCl is both precipitation and double-displacement reaction. The balanced chemical equation is given as:
AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)
(ppt)
In a double displacement reaction the anions are exchanged and the more reactive element displaces the less reactive element. And in a precipitation reaction, a precipitate is formed in the end of the reaction. In this reaction, AgCl is formed as precipitate.
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The four naturally occurring isotopes of sulfur are sulfur-32 sulfur-33 and sulfur-34.
Fourth naturally occurring isotope of sulfur is sulfur-36. The average atomic mass of Sulfur is 32.066 amu.
Natural abundance of isotopes of sulfur is:
sulfur-32 is 95.0%
sulfur-33 is 0.76%,
sulfur-34 is 3.22%
sulfur-36 is 0.89%
The average atomic mass of an element is defined as the total of atomic mass of an isotope multiplied by its natural abundance. Atomic mass of sulfur can be found as
Average Atomic Mass = (Atomic mass of S-32 * Abundance of S-32) + (Atomic mass of S-33 * Abundance of S-33) + (Atomic mass of S-34 * Abundance of S-34) + (Atomic mass of S-36 * Abundance of S-36)
Average Atomic Mass = (32amu × 0.95) +(33amu × 0.0076) + (34amu × 0.0322) +(36amu × 0.0089)
Average Atomic Mass = (30.4amu) + (0.2508amu) + (1.0948amu) + (0.3204amu)
Average Atomic Mass = 32.066 amu
Your question is incomplete but most probably your full question was;
Sulfur has 4 isotopes: sulfur-32 is 95.0%, sulfur-33 is 0.76%, sulfur-34 is 3.22%, and sulfur-36 is 0.89% abundant. calculate its average atomic mass. express your answer with five sig figs.
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2 c2h2(g) 5 o2(g) -----> 4 co2(g) 2 h2o(g) if you have 3.40 moles of acetylene (c2h2) for a complete reaction, how many moles of o2 are needed:
The 0.16 moles of o2 are needed for to complete this reaction.
What is mole?
The term "mole" refers to the volume of a system that includes as many elementary particles as there are atoms in 0.012 kilograms of carbon 12.
What is acetylene?
The simplest alkyne chemical, often known as acetylene. Ethyne, narceine, and vinylene are other names for acetylene. It is widely utilised as a fuel and a component of chemical compounds. It is treated as a solution even though it is unstable in its pure state.
2C2H2(g)+5O2(g)→4CO2(g)+2H2O(g)
A) 2 moles C2H2 require 5 moles O2
3.0 moles C2H2 require 3.0 x 5 / 2 = 7.5 moles O2
moles of O2 required = 7.5
B) 2 moles C2H2 produce 4 moles CO2
3.2 moles CH2 produce 3.2 x 4 / 2 = 6.4
moles of CO2 produced = 6.4
C) 2 moles H2O require 2 moles C2H2
0.58 moles H2O require 0.58 x 2 / 2 = 0.58 moles C2H2
moles C2H2 require = 0.58
D) 5 moles O2 produce 4 moles CO2
0.20 moles O2 produce 0.20 x 4 / 5 = 0.16
moles CO2 produced = 0.16
Therefore, 0.16 moles of o2 are needed for to complete this reaction.
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