pH of the buffer solution is obtained by Henderson's hasselbalch equation.
Buffer solution is water based solution which consists of a mixture containing a weak acid and a conjugate base of the weak acid.or a weak base and conjugate acid of a weak base.it is a mixture of weak acid and a bae.
The pH of the buffer solution is determined by the expression of the Henderson hasselbalch equation.
pH=pKa + log[(A-)/(HA)]
Where, pKa =dissociation constant
A- = concentration of the conjugate base
[HA]= concentration of the acid
Here, a buffer solution contains 0.418 m of ammonium bromide and 0.242 of ammonia, if 0.0556 moles of sodium hydroxide is added to the225 ml of the buffer.
Initial mole of NH4+ = 0.418m .0.250l=0.104m
Initial mole of NH3= 0.242m .0.250l=0.060m
After addition of 0.0556m of sodium hydroxide, the final mole of NH4 becomes 0.66 and the final mole of NH3 becomes 0.61m.
Final NH4+ = 0.66m/0.225L=2.93 m/l
Final NH3 = 0.61m/0.225l=2.71m/l
Putting all the values in the Henderson hasselbalch equation we find the pH of the buffer solution.
To learn more about Henderson's hasselbalch equation please visit:
https://brainly.com/question/13423434
#SPJ4
Does it matter what kind of compound you have (ionic/covalent) when you're drawing Lewis Structures? Why or why not?
Yes, because Ionic compounds only have single bonds, but Covalent compounds can have double and triple bonds.
No, there is no difference between Ionic and Covalent bonds.
No, because there is no way to tell the difference between Ionic and Covalent bonds.
Yes, because Covalent compounds have bonds and Ionic compounds don't, and that needs to be represented in the drawing.
Yes, because Ionic compounds only have single bonds, but Covalent compounds can have double and triple bonds.
What is the Lewis structure of ionic and covalent bonds?In Ionic compounds, the Lewis Dot Structure shows how the electrons are being transferred to form ions in the compound. In covalent compounds, the Lewis Dot Structures must show how the electrons are being shared to complete the outermost shell of each atom in the molecule. In Lewis electron structures, we can see bonding pairs, which are shared by two atoms as well as lone pairs which are not shared between two atoms. If both electrons come from the same atom in a covalent bond, the bond is known as a coordinate covalent bond.
So we can conclude that option A is the right answer.
Learn more about Lewis's structure here: https://brainly.com/question/20300458
#SPJ1
What is the percent yield of NH3 for the reaction depicted in the following figure? the blue spheres are nitrogen and the white spheres represent hydrogen
The percent yield of NH₃ for the reaction is 75%
Percent yield is the percent ratio of actual yield to the theoretical yield
The first thing that you need to do here is to calculate the theoretical yield of the reaction that is if the reaction has 100% yield then
The balanced chemical equation
N₂ + 3H₂ → 2NH₃
This tell you that every 1 mole of nitrogen gas that takes part in the reaction will consume 3 moles of hydrogen gas and produce 1 mole of ammonia and here that 1 mole of nitrogen gas react with 1 mole of hydrogen gas and since enough hydrogen gas to ensure that all moles of nitrogen gas can react
3 mole H₂ > 1 mole H₂
1 mole H₂×2 mole NH₃/3mole H₂ = 0.667 mole NH₃
So at 100% yield this represent the reaction thereotical yield
Now that reaction produced 0.50 moles of ammonia then this represent the reaction actual yield
In order to find the % yield you have to figure out how many moles of ammonia are actually produced for every 100 moles of ammonia that could theoretically be produced
Then 0.667 moles will produce 0.50 moles so you can say that
100 moles NH₃ in theory ×0.50 moles NH₃ actual/0.667 moles of NH₃ actual = 75 moles of NH₃
Therefore, you can say that the reaction has a percent yield equal to
%yield = 75%
Know more about nitrogen and hydrogen
https://brainly.com/question/24449769
#SPJ4
What is the relationship between the mass difference and the difference in
percent solution?
Relationship between the mass difference and the difference in percent solution is the mass percent give the ratio between the mass of a component in a mixture and the total mass of the mixture
Percent by mass is in term of the masses of the solute and the solution and it is ratio of the mass of solute to the total mass of the solution and percent by volume on the other hand is in term of the volume of the solute and the solution and the difference between mass percent and percent composition is that mass percent give ratio between the mass of a component in a mixture and total mass of the mixture
Know more about percent solution
https://brainly.com/question/6992535
#SPJ1
name the 3 types of nitrogenous wastes, identify which has the highest and which has the lowest nitrogen content and if energy is needed to produce it. underline the one associated to fish.
The three types of nitrogenous wastes are urea, ammonia and uric acid. ammonia is high toxic nitrogen waste and uric acid is least toxic nitrogen waste.
What are nitrogenous wastes?
Nitrogenous wastes are those substances which are produced during protein metabolism process.
Proteins are nitrogen containing substances and when metabolism process occurs the extra amount of nitrogen is released from the body in the form of waste.
In animals all these nitrogenous wastes are discharged from the body in different forms.
However, the most common way of discharging these waste products is feces and urine.
Moreover, the nitrogenous waste associated wit fish is ammonia.
If you need to learn more about nitrogenous wastes click here:
https://brainly.com/question/28302805
#SPJ4
Rebecca made a mixture of raisins, nuts, and dried fruit for a snack. Which kind of mixture was rebecca’s snack?.
Rebecca made a mixture of raisins, nuts, and dried fruit for a snack then kind of mixture was rebecca’s snack is heterogenous mixture
A mixture is composed of one or more pure substances in varying composition and a pure substances or a homogenous mixture consist of a single phase and a heterogenous mixture consist of two or more phases and when oil and water are combined and they do not mix evenly and but instead form two separate layer and each of the layer is called a phase and here is a mixture of raisins, nuts, and dried fruit that's why it is different fruits are seen so it is the heterogenous mixture
Know more about mixture
https://brainly.com/question/11665608
#SPJ4
if you wanted to produce 4 moles of so3 gas, how many moles of so2 would you need to react? (assume an unlimited supply of o2 gas.) italic 2 italic space s o subscript italic 2 italic space italic (g italic )italic space italic plus italic space o subscript italic 2 italic space italic (g italic )italic space italic rightwards arrow italic 2 italic space s o subscript italic 3 italic space italic (g italic )
If we wanted to produce 4 moles of SO3 gas, we needed to react: 4 moles of SO2. This is because SO2 to SO3 coefficient ratio is 2:2.
How many moles of SO2 would we need to react?To determine how many moles we need to react, first, we got to write the balanced chemical equation of this reaction:
2SO2(g) + O2(g) --> 2SO3(g)
The number of coefficients is equal to the ratio of moles. The ratio of SO2: SO3 is 2:2. As we want to produce 4 moles of SO3 gas, the amount of SO2 we would need to react will also be 4 moles. Hence, the correct answer is 4 moles of SO2.
Learn more about stoichiometry here https://brainly.com/question/16060223
#SPJ4
below is the lewis structure of the nitrogen molecule. count the number of bonding pairs and the number of lone pairs around the right nitrogen atom in this molecule.
The number of bonding pairs is equal to 3 and the number of lone pairs is 1.
Each atom shares an electron when two atoms join together to create a bond. The electrons involved in this relationship are referred to as the bond pairs of electrons. A lone pair, also known as an unshared pair or a non-bonding pair, is a pair of valence electrons that are not shared with another atom in a covalent bond. Atoms' outermost electron shell contains lone pairs.
Each nitrogen atom in N₂ has three bonding pairs and one lone pair.
Formal charge = Number of Valence Electrons - Number of Lone Electron Pairs - (Number of Bonded Electron Pairs/2) = 5 - 2 - (6/2) = 0
Therefore, each nitrogen atom in N₂ has a formal charge of zero.
The complete question is attached as an image as the question given is incomplete.
Want to learn more about lewis structure visit;
https://brainly.com/question/20300458
#SPJ4
How many of the following molecules have sp2 hybridization on the central atom? hcn so2 ocl2 xecl2.
Only one molecule have sp2 hybridization on central atom and that is SO₂.
XeCl₂ have sp3d hybridization.
OCl₂ have sp3 hybridization.
HCN have sp hybridization.
Hybridization is defined as the concept of mixing two atomic orbitals to give rise to a new type of hybridized orbitals.
Hybridization intermixing usually results in the formation of hybrid orbitals having entirely different energies, shapes, etc.
Learn more about hybridization here:- https://brainly.com/question/22765530
#SPJ4
Connect It: How does the respiratory system, circulatory system and digestive system all work?
The respiratory system brings in oxygen and gets rid of carbon dioxide. The circulatory system moves the blood around the body. The digestive system breaks down food and absorbs the nutrients.
What is digestive system?
The gastrointestinal tract and additional digestive organs make up the human digestive system (the tongue, salivary glands, pancreas, liver, and gallbladder). Food is broken down during digestion into ever-smaller pieces so that they can be absorbed as well as assimilate by the body. The cephalic phase, the gastric phase, as well as the intestinal phase are the three stages of the digestive process. The cephalic phase of digestion starts with gastric gland secretions in response to the smell and sight of food. In this stage, food is mechanically broken down by chewing and chemically broken down in the mouth by digestive enzymes. The salivary as well as serous glands on the tongue secrete the digestive enzymes lingual lipase and amylase, which are found in saliva.
To learn more about digestive system
https://brainly.com/question/956634
#SPJ1
choose the correct chemical formulas for the reactants and the products. the (base hydrolysis) reaction of a fluoride ion in water is:
The correct chemical formulas are as follows -
Reactant - [tex] H_{2}O [/tex] (aq) and F(-) (l)
Product - HF (aq) and OH(-) (aq)
The complete chemical reaction is as follows -
[tex] H_{2}O [/tex] + [tex] {F}^{ - } [/tex] --> HF + [tex] {OH}^{ - } [/tex].
In this chemically balanced reaction, [tex] H_{2}O [/tex] is water, [tex] {F}^{ - } [/tex] is fluorine ion, HF is hydrogen fluoride and [tex] {OH}^{ - } [/tex] is hydroxyl ion. Also mentioned in answer, the abbreviation aq indicates aqueous and l indicates liquid.
In the mentioned reaction, fluoride ion acts as weak Bronsted-Lowry Base. It means that fluorine ion accepts the hydrogen ion, which is evident by the formation of hydrogen fluoride. The hydroxyl ion formed in the reaction imparts basic character.
Learn more about hydrolysis -
https://brainly.com/question/8740481
#SPJ4
The complete question is attached in the figure.
What type of skin tissue enables movement
A. nerve tissue
B. muscle tissue
C. epithelial tissue
D. connective tissue
Answer: B
Explanation:
''Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts''
Please answer for award
The density of the penny is 2g/mol
Density is a measure of how compact the mass in a substance or object is
Here given data is
Mass of penny = 3gram
Volume of penny = 31.5 ml after penny was dropped
Volume of penny = 30 ml before penny was dropped
We have to calculate the density of penny = ?
Volume of penny = 31.5 - 30ml = 1.5ml
So density = mass/volume
Density = 3gram/1.5ml
Density = 2g/mol
Know more about penny
https://brainly.com/question/1405443
#SPJ1
Describe the properties of common alloys (carbon steel, bronze, brass, and sterling silver) and how their properties are different than their parts.
The properties of common alloys include the following:
High melting pointGood conductors of heat and electricity.Corrosive resistant.What is an Alloy?This is referred to as a type of substance which is composed of two or more elements. It comprises of at least a metal and is of various types which include bronze which is made up of copper and tin and brass which is made up of copper and zinc.
Most alloys are corrosive resistant because they aren't easily oxidized when exposed to aerobic conditions. They are also good conductors of heat and electricity due to their high degree of hardness and toughness which makes them tightly packed together thereby favoring flow of electrons and is the reason why they are different from their parts and is therefore the correct choice.
Read more about Alloy here brainly.com/question/16935193
#SPJ1
Engineers are evaluating a halogen bulb as a possible solution to lighting a
reading workspace. What criteria might they consider?
Answer:
Factor # 1. Illumination Level: ...
Factor # 2. Uniformity of Illumination: ...
Factor # 3. Colour of Light: ...
Factor # 4. Shadows: ...
Factor # 5. Glare: ...
Factor # 6. Mounting Height: ...
Factor # 7. Spacing of Luminaries: ...
Explanation:
Halogen bulbs are used in working spaces and motor vehicles. To evaluate the working of halogen bulbs engineers has check the gas pressure inside, voltage, weight , life time etc.
What are halogen bulbs?Halogen bulbs are light sources made by halogen gas filled inside. The halogen gas combines with the tungsten vapor inside. Halogen bulbs are efficient in comparison with incandescent bulbs.
Halogen bulbs has higher life time, small and relatively lite weight. Halogen bulbs produces bright white light which is better than the yellowish light of incandescent lights.
The chemical reaction of the halogen cycle is produced when halogen gas and tungsten filament are combined. This reaction can prolong the life and preserve the purity of the bulb.
To evaluate the performance of halogen bulbs, engineers have to check the gas pressures, life time and heat energy released.
To find more on halogen bulbs, refer here:
https://brainly.com/question/4504033
#SPJ2
g when zn reacts with hcl solution, the products are h2 gas and zncl2: how many moles of h2 gas were produced in the reaction?
1 mol of H2 gas were produced in the reaction
Zn + 2HCl --> ZnCl2 + H2
This is a single displacement reaction
What is a single displacement reaction?
It is a kind of oxidation-reduction chemical reaction when an ion or element moves out of a compound, i.e., one element is replaced by the other in a compound.
What is mole ratio?
It is the ratio between amounts in moles of any two compounds involved in a balanced chemical reaction.
As we can see mole ratio from the coefficient of balanced reaction:
2 moles of HCl produces 1 mole of H2 gas
Learn more about displacement reaction at - Brainly.com https://brainly.com/question/20690229
#SPJ4
The sp3 hybridization has what percent s character and what percent p character?.
The sp3 hybridization has a 1 s orbital and 3 p orbitals. Hence, it has a percentage of 25% s and 75% p characters.
What is sp3 hybridization?Sp3 hybridization is the mixing character of one 2s orbital and three 2p orbitals that create 4 hybrid orbitals with similar characteristics. The sp3 hybridization affects the molecular geometry to the shape of tetrahedral. This shape is created by bonding an atom to 4 other atoms that arrange with a bond angle of 109.5 degrees. Some compounds that have sp3 hybridization are ethane, methane, and diamond. Those compounds have 25% s character and 75% p character.
Learn more about hybridization here https://brainly.com/question/28915991
#SPJ4
What volume (in liters, at 298 K and 6.09 atm) of chlorine gas is required to react with 7.44 g of P?
The volume (in litres at 298 K and 6.09 atm) of chlorine gas, Cl₂, that is required to react with 7.44 g of P is 2.41 L
How do I determine the volume of chlorine gas, Cl₂?To determine the volume of the chlorine gas that will react with 7.44 g of P, we shall begin by obtaining the mole of the chlorine gas, Cl₂ that reacted. This can be obtained as follow:
Mass of P = 7.44 gMolar mass of P = 31 g/molMole of P = mass / molar mass = 7.44 / 31 = 0.24 mole2P + 5Cl₂ → 2PCl₅
From the balanced equation above,
2 moles of P reacted with 5 moles of Cl₂
Therefore,
0.24 moles of P will react with = (0.24 × 5) / 2 = 0.6 mole of Cl₂
Haven obtain the mole of chlorine gas, Cl₂, we shall determine the volume of the chlorine gas, Cl₂, required by using the ideal gas equation. This is shown below
Number of mole of Cl₂ (n) = 0.6 moleTemperature (T) = 298 KPressure (P) = 6.09 atm Gas constant (R) = 0.0821 atm.L/Kmol Volume of chlorine gas (V) =?PV = nRT
6.09 × V = 0.6 × 0.0821 × 299
Divide both sides by 6.09
V = (0.6 × 0.0821 × 299) / 6.09
V = 2.41 L
Thus, the volume of chlorine gas required is 2.41 L
Learn more about volume:
https://brainly.com/question/8476909
#SPJ1
why does salt dissolve in water while sugar does not (please tell me with ionic and covalent compounds and also about the crystal lattice as well as the polarr! Thankyou!)
Sugar and salt both dissolves in water because both are hydrophilic in nature.
The water molecule is the polar compound. water is the covalent compound but polar in nature that means oxygen is the more electronegative so it contains partial negative and the hydrogen has the partial positive charges. sugar and salt both are hydrophilic in nature means water loving. salt contains ionic bond means molecule have full charges and sugar contain polar bond or polar covalent bond means contains partial charges. salt dissociates in water and forms ion and interact with the partial charges on water. sugar have polar covalent bond and interact with partial charges on the water and dissolve as well.
Thus, Sugar and salt both dissolves in water because both are hydrophilic in nature.
To learn more about polar bonds here
https://brainly.com/question/10777799
#SPJ1
IXL question on velocity and distance i need answer asap
The velocity of Bridgette is 50 kilometers per hour to the east.
What is the velocity of an object?The velocity of an object is the speed that the object is moving in a specified direction.
Velocity is defined as the ratio of the displacement of an object and the time taken.
The displacement of a body is the distance traveled by that body in a specific direction.
Velocity is a vector quantity.
Mathematically;
Velocity = displacement / time
Considering the given question:
Bridgette drove her car 30 kilometers east at a constant velocity; hence, her displacement is 30 Kilometers east.
It took her 0.6 hours to drive that distance; hence, the time take = 0.6 hours.
Velocity = 30 kilometers / 0.6 hours
Velocity = 50 kilometers per hour to the east
Learn more about velocity at: https://brainly.com/question/24739297
#SPJ1
What is a biosphere
Answer:
The Biosphere is the part of the earth where life exists.
Biosphere is all organisms on Earth for example plants animals and microoganisms.
Explanation:
an oxygen atom at a particular site within a dna molecule can be made to execute simple harmonic motion when illuminated by infrared light. the oxygen atom is bound with a spring-like chemical bond to a phosphorus atom, which is rigidly attached to the dna backbone. the oscillation of the oxygen atom occurs with frequency fo
The oscillation of the oxygen atom occurs with frequency fo = 3.7 × 10¹³ Hz when oxygen atom replace to sulfur the frequency of sulfur is 2.7 × 10¹³ Hz.
The frequency expression is given as :
F = ( 1/ 2π ) × √(k/m)
or F² m = k / 4π²
now. if oxygen atom is replaced by the sulfur atom:
(F² m) oxygen = ( F² m) sulfur
F sulfur = F oxygen × √ (m oxygen / m sulfur)
F sulfur = 3.7 × 10¹³ × √ 16 / 32
F sulfur = 2.7 × 10¹³ Hz.
Thus, An oxygen atom at a particular site within a DNA molecule can be made to execute simple harmonic motion when illuminated by infrared light. the oxygen atom is bound with a spring-like chemical bond to a phosphorus atom, which is rigidly attached to the DNA backbone. the oscillation of the oxygen atom occurs with frequency fo = 3.7 × 10¹³ Hz when oxygen atom replace to sulfur atom the frequency of sulfur is 2.7 × 10¹³ Hz.
To learn more about frequency here
https://brainly.com/question/14398865
#SPJ4
Fatty acids usually have an even number of carbons in their structures. They are catabolized by a process called beta-oxidation. The end products of the metabolic pathway are acetyl groups of acetyl coa molecules. These acetyl groups _____.
The end products of the metabolic pathway are acetyl groups of acetyl CoA molecules and these acetyl groups directly enter the citric acid cycle.
What is beta oxidation?Beta-oxidation is a four-step process, which keeps repeating until the fatty acid is completely broken down. Steps are dehydrogenation, hydration, oxidation, and thiolysis.
Dehydrogenation is catalyzed by Acyl-CoA-dehydrogenase that coverts FAD to FADH2 for the formation of a double bond between C2 and C3.
Beta oxidation of fatty acids takes place inside mitochondria in which two carbon atoms are removed in the form of acetyl-CoA from acyl-CoA at carboxyl terminal. Then the bond is broken between the second beta carbon and the third gamma carbon, hence it is called beta oxidation.
To know more about beta oxidation, refer
https://brainly.com/question/7311438
#SPJ4
a solid consisting of clear crystals is combined with a blue liquid in a container, and the following observations are obtained:
A solid consisting of clear crystals is combined with a blue liquid in a container and the following observations are obtained 3.
A chemical response might be going on these aren't specific indicators a chemical response may not be occurring. An exchange in shade isn't constantly a chemical change. A chemical change has taken region. One way that we recognize that is due to the fact bubbles are fashioned. those bubbles suggest that the hydrogen peroxide has been damaged aside from water and oxygen.
The trade that happens whilst or greater materials act on each other to form an exceptional substance. Use this word in a sentence or provide an instance to show you understand what means when the color scent and flavor of the aggregate changed I knew a chemical reaction had taken place. sometimes when solutions go through a chemical reaction one of the new products formed from the response is not soluble.
Learn more about Observations here:-https://brainly.com/question/584814
#SPJ4
What name is given to the process by which radioactive atoms break down and change into a different type of atom?
a cylinder with a moveable piston contains 92g of nitrogen. the external pressure is constant at 1.00 atm. the initial temperature is 200k. when the temperature is increased by 92 k, by taking it out of the freezer, the volume will increase, according to the ideal gas law. calculate the work for this process.
The work for the compression process is 3719.3 J.
What is ideal gas law ?
The ideal gas is the virtual gas that chemists and students dream of because it would be much simpler if there weren't some kind of intermolecular force that would complicate the simple law of the ideal gas. An ideal gas is essentially a point cloud moving with constant random linear motion. Its behavior is described by the assumptions described in the kinetic molecular theory of gases. This ideal gas definition contrasts with the non-ideal gas definition. This is because this equation describes how gases actually behave. First, let us consider the ideal gas. The ideal gas law is simply a combination of all the simple gas laws (Boyle's law, Charles' law, Avogadro's law), and if you learn this law, you've learned them all. . The simple gas law can always be derived from the ideal gas equation.
To know more about ideal gas law , click the given link ;
https://brainly.com/question/24172157
#SPJ4
A sample of 9.30 g of solid calcium hydroxide is added to 34.0 mL of 0.410 M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction. Physical states are optional.
0.612 gram of calcium chloride is produced and excess reactant is 9.19 grams.
The balanced chemical equation is -
[tex] Ca(OH)_{2}[/tex] + 2HCl -> [tex] CaCl_{2}[/tex] + 2[tex] H_{2}[/tex]O. The reactants on LHS are calcium hydroxide and hydrochloric acid while products on RHS are calcium chloride and water.
Calculating the product formed from 9.30 gram of calcium hydroxide
Molar mass of calcium hydroxide = 111 gram
Molar mass of calcium hydroxide = 74 gram
Mass of calcium chloride produced from calcium hydroxide = (9.6 × 111) ÷ 74
Mass of calcium chloride produced from calcium hydroxide = 14.38 gram
Mass of calcium chloride produced from hydrochloric acid = (34.5/1000) × 0.320 × 111 × (1/2)
Mass of calcium chloride produced from hydrochloric acid = 0.612 gram
Since hydrochloric acid is the limiting reagent, it complete consumption will stop the process. Hence, after completion of reaction, 0.612 gram of calcium chloride will be formed.
Initial amount of HCl = (34.5/1000) × 0.320
Initial amount of HCl = 0.0110 moles of HCl
Moles of [tex] Ca(OH)_{2}[/tex] used = 0.0110 × (1/2)
Moles of [tex] Ca(OH)_{2}[/tex] used = 0.00552 moles
Initial amount of [tex] Ca(OH)_{2}[/tex] = 9.60/74.09
Initial amount of [tex] Ca(OH)_{2}[/tex] = 0.1296 moles
Excess reactant = (0.1296 - 0.00552) × 74.09
Excess reactant = 9.19 grams.
The reaction will produce 0.612 grams hydrochloric acid and 9.19 grams of excess reactant.
Learn more about limiting reagent -
https://brainly.com/question/26905271
#SPJ4
The complete question is attached in diagram.
Aniline, is a weak base with kb of 7. 4 × 10-10. Which indicator would be the most appropriate to titrate an aqueous solution of aniline?.
The most appropriate indicator for titrating aqueous aniline solutions is methyl red with a pH of 5.87.
Aniline (a weak base) when titrated with a strong acid will neutralize at a pH of less than 7.
The reaction will be
B + H⁺ → BH⁺ + Cl⁻
BH+ will hydrolyze as:
BH⁺+ H₂O ⇄ B + H₃O⁺
Ka conjugate acid aniline = 10⁻¹⁴/7.4 x 10⁻¹⁰ = 1.35 x 10⁻⁵
pKa = 4.87
Probable pH at the equivalence point = 4.87 + 1.00 = 5.87
The most appropriate indicator is methyl red with a pH equivalent point of 5–6.
Learn more about titration of a weak base with strong acid at https://brainly.com/question/13031875
#SPJ4
2.28 explain the concept of effective nuclear charge and how it affects atomic radii and ionization energies.
As the effective nuclear charge of an atom increases the atomic radii decreases and the ionization energy increases.
Effective nuclear charge is the net positive charge experienced by an single electron in an multi electron atom. The term “effective” is used because of the shielding effect of negatively charged electrons that prevents higher orbital electrons from experiencing the full nuclear charge.
So keeping this concept in mind we can say that as the effective nuclear charge on any atom increases the atomic radii or the size of the atom decreases. This is because as the the effective nuclear charge increases the electrons that are present in the orbit are pulled closer to the nucleus, so if the effective nuclear charge is more then the electrons are pulled more towards the nucleus and therefore the size or rhe atomic radii decreases
Now if we talk about the ionization energies, ionization energy is the energy required to remove the outer most electron from the orbit to form the ion. So if the effective nuclear charge is more for an atom then obviously the size of the atom would be less and because of this it will be difficult to remove the outermost electron as it is strongly attracted towards the nucleus. Hence the ionization energy will be more.
To know more about effective nuclear charge
https://brainly.com/question/2321621
#SPJ4
the arrangement of electrons in an atom of an element determines the chemical properties of that element. Our present day understanding of how electrons are arranged in an atom is the result of all of these scientific contributions except
The result of all of these scientific contributions except Rutherford's gold foil experiment proved the existence of the nucleus.
The valence electrons mainly determine the chemical houses of the elements. The elements inside the equal group have comparable chemical homes because they have identical valence shell electron configurations. The electrons in the power degrees with the highest range are in common the farthest from the nucleus.
Because variations in electrons placed inside the outermost stage distinguish an atom from its nearest noble fuel these are the electrons accountable for the atom's chemical conduct. Electrons located inside the outermost shell of the electron cloud are called valence electrons and feature the best power. Valence electrons determine the chemical homes of an element or how the valence electrons of 1 element are shared or traded with valence electrons of other elements to create new molecules.
Learn more about Electrons here:-https://brainly.com/question/860094
#SPJ4
If 250 ml of methane, ch4, effuses through a small hole in 28 s, the time required for the same volume of helium to pass through the hole under the same conditions will be.
To find the volume, known grahams law of diffusion.
What is grahams law of diffusion?
The rate of diffusion or effusion of a gas is inversely related to its square root of molar mass, according to Graham's Law. The majority of the time, particles in a material that are in a low-concentration area will move to a high-concentration area. When we spray scented air freshener or perfume in one area of the room and then we can smell it throughout the entire space, this process is easily illustrated. The SI unit for the diffusion coefficient is square meters per second (m2/s).
What is Volume ?
The amount of cubic space a three-dimensional object takes up (measured in inches, quarts, or centimeters): square footage.
Therefore, the same volume of helium to pass through the hole under the same conditions will be same.
Learn more about grahams law of diffusion from the given link.
https://brainly.com/question/22359712
#SPJ4