The bonds arranged in order decreasing polarity depends on the differences in electronegativities of the two bonded atoms. The correct answer to the question is the first choice i.e. H-F > N-F > F-F.
Polarity is a state or a condition of any atom or any molecule inherent in a body, to exhibit opposite powers or properties in opposite parts or directions.
In general, Polarity refers to the physical properties of any compound such as it's boiling point, melting point, and solubility. The polarity of the bonds mainly arises from the act/bonding between molecules and atoms with various different/same electronegativities.
More the electronegativity difference between the bonded atoms, more is the polarity of the molecule/compound.
Hence, let's see all the choices one by one.
Choice 1 has Florine atom bonded with H, N and another Florine atom. The electronegativity of Hydrogen is very low and that of Florine is the highest among all elements of periodic table, hence the polarity of H-F is the highest among the three and that of N-F is lower than that, and that of F-F is zero as F-F has a electronegativity difference of zero. Thus the order of polarity given in this choice is correct.
Similarly, if we look at the other choices, the orders o polarity are incorrect. The correct order of their polarities based on electronegativity difference must be as the following:
Choice 2: H-F > H-Br > H-I
Choice 3: O-Te > O-S > O-N
Choice 4: Sb-Cl > Sb-I > Sb-Te
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Answer:
The correct answer is A) H−F > N−F > F−F.
Explanation:
In this question, we are comparing the polarity of different bonds. Polarity is determined by the difference in electronegativity between the atoms involved in a bond. Electronegativity is a measure of an atom's ability to attract electrons towards itself.
When comparing the bonds in option A, we see that hydrogen and fluorine have a large difference in electronegativity, resulting in a highly polar bond. Nitrogen and fluorine also have a significant electronegativity difference, but it is smaller than that of hydrogen and fluorine. Finally, fluorine and fluorine have the least electronegativity difference, resulting in a nonpolar bond.
In option B, hydrogen and iodine have a smaller electronegativity difference compared to hydrogen and fluorine. Therefore, the bond between hydrogen and iodine is less polar than the bond between hydrogen and fluorine. The same logic applies to the bond between hydrogen and bromine.
Option C compares bonds involving oxygen, nitrogen, sulfur, and tellurium. Oxygen and nitrogen have a smaller electronegativity difference compared to oxygen and sulfur, resulting in a less polar bond. Similarly, oxygen and sulfur have a smaller electronegativity difference compared to oxygen and tellurium.
Option D compares bonds involving antimony and iodine, antimony and tellurium, and antimony and chlorine. Antimony and iodine have a smaller electronegativity difference compared to antimony and tellurium, resulting in a less polar bond. Similarly, antimony and tellurium have a smaller electronegativity difference compared to antimony and chlorine.
To summarize, the bonds arranged in order of decreasing polarity are: H−F > N−F > F−F. This means that the bond between hydrogen and fluorine is the most polar, followed by the bond between nitrogen and fluorine, and finally, the bond between fluorine and fluorine is nonpolar.
which of the following types of reactions will reach dynamic equilibrium? multiple select question. weak bases in water gas-forming reactions in an open system weak acids in water reactions where the product is removed
Only reversible reactions may reach dynamic equilibrium, which happens when the rates of the forward and reverse processes are identical.
When a system is in a state of dynamic equilibrium, the reversible reaction that is occurring in it no longer changes the ratio of reactants to products, but there is still movement of substances between the reactants and products. Because reactants and products continue to alter even after equilibrium has been reached, chemical equilibrium is dynamic in nature. Dynamic equilibrium is a condition in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of pressures exerted on them in both situations is zero.
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Only reversible reactions may reach dynamic equilibrium, which happens when the rates of the forward and reverse processes are identical.
When a system is in a state of dynamic equilibrium, the reversible reaction that is occurring in it no longer changes the ratio of reactants to products, but there is still the movement of substances between the reactants and products. Because reactants and products continue to alter even after equilibrium has been reached, chemical equilibrium is dynamic in nature. Dynamic equilibrium is a condition in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of pressure exerted on them in both situations is zero.
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Which of the following is often easily separated into its components by simple techniques suchas filtering or decanting?
a.heterogeneous mixture
b.compounds
c.homogeneous mixture
d.elements
e.solutions
Heterogeneous mixtures easily separated into its components by simple techniques suchas filtering or decanting.
What is meant by filtering ?
Employing specialized equipment, remove particles from liquids or gases or specific forms of light: To get rid of any pollutants, the water is filtered.The most typical illustration is brewing tea. Tea leaves and water are separated during tea preparation using a filter or sieve.The pores of the sieve will only let water through. The filtrate, in this case water, is the liquid that has been obtained following filtration.The technique of filtering involves forcing a liquid to flow through the pores of a substance known as a filter in order to separate suspended solid particles from a liquid. The filtrate is the liquid that has gone through the filter.To learn more about filtering refer to
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Propose structures for hydrocarbons that give the following products on oxidative cleavage by KMnO4 or O3 :
The non - terminal alkynes gives the carboxylic acid on the oxidative cleavage by the KMnO₄ or O₃.
The non - terminal alkynes have the triple bond in any positions other than the end position. The non - terminal alkynes gives carboxylic acid on the oxidative cleavage by the KMnO₄ or O₃. The oxidative cleavage is the reaction in which carbon - carbon bond cleaved with the oxidation of the carbons. The ozonolysis is the method of the oxidative cleavage of the alkynes and the alkene.
The alkyne ozonolysis is the example of an oxidative ozonolysis. The O₃ is the reactive allotrope of oxygen.
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Sucrose (C12H22O11) reacts with potassium chlorate according to the following balanced equation:
C12H22O11 (s) + 8 KClO3 (s) 12 CO2 (g) + 11 H2O (g) + 8 KCl (s)
Suppose 3.5 moles of C12H22O11 are mixed with 21.0 moles of KClO3. Identify the limiting reactant, then
calculate how many moles of each product (CO2, H2O and KCl) will be formed in this reaction.
Taking into account definition of the reaction stoichiometry, potassium chlorate is the limiting reactant and 31.5 moles of CO₂, 28.875 moles of H₂O and 21 moles of KCl are formed when 3.5 moles of C₁₂H₂₂O₁₁ are mixed with 21.0 moles of KClO₃.
Reaction stoichiometryIn first place, the balanced reaction is:
C₁₂H₂₂O₁₁ (s) + 8 KClO₃ (s) → 12 CO₂ (g) + 11 H₂O (g) + 8 KCl (s)
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
C₁₂H₂₂O₁₁= 1 molesKClO₃= 8 molesCO₂= 12 molesH₂O= 11 molesKCl= 8 molesWhat is limiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.
Limiting reagent in this caseTo determine the limiting reagent, the following rule of three can be applied: if by stoichiometry 1 mole of C₁₂H₂₂O₁₁ reacts with 8 moles of KClO₃, 3.5 moles of C₁₂H₂₂O₁₁ reacts with how many moles of KClO₃?
moles of KClO₃= (8 moles of KClO₃×3.5 moles of C₁₂H₂₂O₁₁)÷1 mole of C₁₂H₂₂O₁₁
moles of KClO₃= 28 moles
But 28 moles of KClO₃ are not available, 21 moles are available. Since you have less moles than you need to react with 3.5 moles of C₁₂H₂₂O₁₁, KClO₃ will be the limiting reagent.
Moles of each product formedConsidering the lomiting reactant, he following rules of three can be applied:
if by reaction stoichiometry 8 mole of KClO₃ form 12 moles of CO₂, 21 moles of KClO₃ form how many moles of CO₂?moles of CO₂= (21 moles of KClO₃×12 moles of CO₂)÷8 mole of KClO₃
moles of CO₂= 31.5 moles
if by reaction stoichiometry 8 mole of KClO₃ form 11 moles of H₂O, 21 moles of KClO₃ form how many moles of H₂O?moles of H₂O= (21 moles of KClO₃×11 moles of H₂O)÷8 mole of KClO₃
moles of H₂O= 28.875 moles
if by reaction stoichiometry 8 mole of KClO₃ form 8 moles of KCl, 21 moles of KClO₃ form how many moles of KCl?moles of KCl= (21 moles of KClO₃×8 moles of KCl)÷8 mole of KClO₃
moles of KCl= 21 moles
Finally, 31.5 moles of CO₂, 28.875 moles of H₂O and 21 moles of KCl are formed.
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HELP PLEASE w/ all questions
Answer:
Explanation: 4P+5O2-----2P2O5
which statement correctly describes archaeal cell walls? multiple choice many have peptidoglycan. some have an outer layer of protein. some have an outer layer of complex polysaccharide and some have an outer layer of protein. some have an outer layer of complex polysaccharide.
Some have an outer layer of complex polysaccharide and some have an outer layer of protein.
What is meant by polysaccharide?
Important classes of biomolecules include polysaccharides. They are lengthy chains of monosaccharide molecules that make up carbohydrates. These intricate biomacromolecules serve as a crucial energy source for animal cells and as a structural element of plant cells.The polysaccharides starch, cellulose, and glycogen are a few examples of.Polysaccharides are used as stabilisers and dietary fibre in the food industry.Polysaccharides can also be produced by bacteria, for instance while making yoghurt.a big molecule of a carbohydrate. It has several tiny sugar molecules that are chemically bonded together. also known as glycan.Our diet includes a lot of sugar, a disaccharide and isomer of lactose and maltose.To learn more about polysaccharide refer to
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A liquid in a lab has a density of 1.17 g/cm^3. What is the volume in liters of 3.02 kg of the liquid?
A liquid's density is a measure of how heavy it is in relation to its measured volume.
Liquid density = 1.17 g / cm^3.
Mass of Liquid = 3.02 kg
1 kg = 1000 g
So, 3.02 kg = 3020.0 g
Using the formula
density of liquid = (mass of liquid) / (volume of the liquid)
By modifying above formula, which gives
volume of the liquid = (mass of liquid) / (density of liquid)
Now, put a value in an expression
Which gives, volume of the liquid = (3020.0 g) / (1.17 g / cm^3)
= 2581.197 cm^3
As, 1 cm^3 = 0.001 L
Therefore, 2581.197 cm^3 = 2.581197 L
Therefore, the liquid volume is 2.581197 L.
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To find the volume of the liquid in liters, we can use the formula of density the volume of 3.02 kg of the liquid is approximately 2.58 liters.
Given to us is
Mass = 3.02 kg
Density = 1.17 g/cm³
The formula is:
Volume = Mass / Density
First, we need to convert the mass to grams:
3.02 kg = 3,020 g
Next, we can substitute the values into the formula:
Volume = 3,020 g / 1.17 g/cm³
To convert the volume from cubic centimeters (cm³) to liters (L), we need to divide by 1000 (since 1 L = 1000 cm³):
Volume = (3,020 g / 1.17 g/cm³) / 1000
Calculating this expression, we find:
Volume ≈ 2.58 L
Therefore, the volume of 3.02 kg of the liquid is approximately 2.58 liters.
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a chemist is trying to get two substances to react, but he is unsuccessful. he knows that the two substances should react with one another. which of the following could he do to possibly get the substances to react? (select all that apply)
It's possible that the substances will react to form the product when the substance is heated. The kinetic energy of a substance will increase when heated. Therefore, choice E is the right one.
What is a Chemical reaction?A chemical reaction is the process by which one or more reactants are changed into products, which are new substances. Depending on the reactants, the substances are either chemical elements or compounds.
Since an increase in temperature typically speeds up a reaction by raising the average kinetic energy of the reactant molecules in a solution, heating the solution will cause the formation of product. This will increase the frequency at which different substances in a solution collide, which will cause products to form.
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Complete question:
A chemist is trying to get two substances to react, but he is unsuccessful. He knows that the two substances should react with one another. Which of the following could he do to possibly get the substances to react? (Select all that apply)
a
increase the concentration of one of the substances
b
crush up one of the substances
c
decrease the concentration of one of the substances
d
cool the substances
e
heat the substances
compare and contrast the electromagnetic spectra and the atomic emission spectra. please use proper grammar and mechanics.
The electromagnetic spectrum and the atomic emission spectra are both related to the study of light and its properties. When an atom absorbs energy, electrons move to a higher energy level, and when they return to a lower energy level, they release energy in the form of light.
The electromagnetic spectrum is a range of all types of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. These types of radiation have different wavelengths, frequencies, and energy levels. The electromagnetic spectrum is a continuous spectrum, with no clear boundaries between the different types of radiation.On the other hand, atomic emission spectra refer to the light emitted by atoms when they are excited. The light emitted by atoms is always specific to the element and the energy level of the atom. . This light is specific to the element and the energy level of the atom, and it results in a line spectrum, which is made up of specific and discrete lines of different colors.In summary, the electromagnetic spectrum is a continuous range of all types of electromagnetic radiation, while atomic emission spectra refer to the specific light emitted by atoms when they are excited, resulting in a discrete line spectrum. The electromagnetic spectrum provides an overview of all types of radiation and their characteristics, while atomic emission spectra allow for the identification of specific elements by analyzing the light they emit.
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Label the species in the atomic-scale picture to represent the result when equimolar amounts of
aqueous barium hydroxide and aqueous iron(II) chloride are combined.
Ba
FeCl2
Fe(OH)2
Ba(OH)2
Ba2-
Cl2
CI
Fe
BaCl2
Fe2-
OH
H2O
solid =
Fe(OH)2
Answer: Green bubble --> Ba2+, Red bubble --> Cl-1, Blue bubble --> Fe2+, Yellow bubble --> OH-1, Solid --> Fe(OH)2 precipitate
What happens when you mix an aqueous solution of barium hydroxide and an aqueous solution of ferric chloride?
A mixture of aqueous barium hydroxide and aqueous ferric chloride gives barium chloride and ferric hydroxide. This reaction is shown below.
Ba(OH)2 (aq) + FeCl2 (aq)--> BaCl2(aq) + Fe(OH)2 (ppt)
Explanation:
Therefore, after reaction in an aqueous solution, there is 1 equivalent of free Ba2+ ions, 2 equivalents of free Cl-1 and Fe(OH)2 ppt. Fe(OH)2 precipitates with 1 equivalent of Fe2+ and 2 equivalents of OH-1 ions.
Hence,
Green bubble--> Ba2+
Red bubble --> Cl-1
Blue bubble --> Fe2+
Yellow bubble --> OH-1
Solid = Fe(OH)2 precipitate
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in the following images, a blue circle represents an atom of one type of element, and a red square represents an atom of a second type of element. determine which of them represent a pure substance, a homogenous mixture, and a heterogeneous mixture.
In the given images structure 1 represents pure element, structure 2 represents heterogenous and structure 3 represents homogenous structure, respectively.
A Pure element is a structure that is made up of only one kind of particle. Homogenous mixture is a mixture that contain same proportion of its components while heterogenous mixture is a mixture that contains unequal proportion of the component.
Given, blue circle represents an atom and red square represents an atom of second type of element.
In the structure given in 1st, half part of sphere contains blue atom and another half contain another type of atom(red). Thus, the structure is an example of pure element.
In the 2nd structure, Blue and Red elements are mixed together in an unequal amount in a sample. Thus, it is an example of heterogenous structure.
In 3rd structure, number of two type of atoms are same. Thus, it is an example of homogenous structure.
Therefore, the provided structure represents pure element, heterogenous structure, and homogenous structure, respectively.
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2. Explain the differences you observed when you added drops of acid or base to the water versus when the drops were added to the phosphate buffer. Explain why this difference occurs.
When the drops of acid or base were added to the water versus when the drops were added to the phosphate buffer, the pH changed considerably unlike in the phosphate buffer.
This is because the buffer neutralizes the drops of acid or base added to it.
What is a buffer solution?A buffer solution is an acidic or basic aqueous solution made up of a mixture of a weak acid and either its conjugate base or base and its conjugate acid. A little bit of a strong acid or base applied to it barely affects its pH.
Hence, when drops of acid or base are added to a buffer such as a phosphate buffer, there is no observable change in the pH of the buffer solution. However, a considerable change in pH occurs when drops of an acid or base are added to water.
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Write the expression for Kc for the following reactions. In each case indicate whether the reaction is homogeneous or heterogeneous.Part A3NO(g)⇌N2O(g)+NO2(g)Kc=[N2O][NO2]3[NO][NO]3[N2O][NO2]3[NO][N2O][NO2][N2O][NO2][NO]3SubmitMy AnswersGive UpPart B3NO(g)⇌N2O(g)+NO2(g)reaction ishomogeneousheterogeneousSubmitMy AnswersGive UpPart CCH4(g)+2H2S(g)⇌CS2(g)+4H2(g)Kc=[CH4][H2S]2[CS2][H2]4[CH4][H2S]2[CS2][H2]2[CS2][H2][CH4][H2S][CS2][H2]4[CH4][H2S]2SubmitMy AnswersGive UpPart DCH4(g)+2H2S(g)⇌CS2(g)+4H2(g)reaction ishomogeneousheterogeneous
All the given reactions are heterogeneous reactions.
How to determine whether the reaction is homogeneous or heterogeneous?
A reaction is classified as homogeneous or heterogeneous based on the phases of the reactants and products involved. A homogeneous reaction is one that occurs in a single phase, while a heterogeneous reaction is one that occurs across different phases. For example, if a reaction involves a solid, liquid, and gas, then it would be considered heterogeneous.
Part A: 3NO(g)⇌N2O(g)+NO2(g)
Kc = [N2O][NO2]^3 / [NO]^3
This reaction is heterogeneous because it involves a change in the number of moles of gas on both sides of the equation.
Part B: 3NO(g)⇌N2O(g)+NO2(g)
reaction is heterogeneous
Part C: CH4(g)+2H2S(g)⇌CS2(g)+4H2(g)
Kc = [CS2][H2]^4 / [CH4][H2S]^2
This reaction is heterogeneous because it involves a change in the number of moles of gas on both sides of the equation.
Part D: CH4(g)+2H2S(g)⇌CS2(g)+4H2(g)
The reaction is heterogeneous.
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identify the two compounds that have the longest atmospheric lifetime in years. give their lifetime in years. True Or False
Inter-molecular interactions between gas particles have a stronger influence on the properties as pressure rises.
Fluoridated gases have the longest atmospheric lifetime. In a gas, the particles are dispersed. They resemble a "ideal gas," where there is little particle interaction and collisions are completely elastic, under normal pressure and at low temperatures. Inter-molecular interactions between gas particles have a stronger influence on the properties as pressure rises. Because of the space between atoms or molecules, the majority of gases are transparent. Like fluorine and chlorine, some of them have almost no color. Gases usually exhibit weaker responses to electric and gravitational fields than other forms of matter. Gases are less dense and more viscous than liquids and solids.
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Balance the redox reaction occurring in acidic aqueous solution: BrO−3(aq)+N2H4(g)→Br−(aq)+N2(g)
The redox reaction occurring in acidic aqueous solution is BrO3(aq) + 6N2H4(g) → 3Br-(aq) + 3N2(g).
The redox reaction occurring in acidic aqueous solution is: BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
To balance this redox equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Additionally, we need to make sure that the charge is balanced on both sides of the equation.
The unbalanced equation looks like this:
BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
We can start by balancing the elements:
BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
Now we can balance the charge:
BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
Finally, we can check that the number of atoms of each element is the same on both sides of the equation.
The balanced equation is:
BrO3(aq) + 6N2H4(g) → 3Br-(aq) + 3N2(g)
The balanced equation shows that 6 molecules of N2H4 and 3 BrO3 are required to produce 3 Br- and 3 N2.
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How many of the following molecules are polar?
CH4, N2, NBr3, PCl5, CH3Cl
The molecules that are polar among the given options are as follows:
NBr₃
CH₃Cl
What are polar molecules?Polar molecules are formed when one end of the molecule is said to possess more positive charges and whereas the opposite end of the molecule has negative charges, creating an electrical pole.
In polar molecules, the distribution of electrons between the covalently bonded atoms is not even.
The N–Br bond in NBr₃ is polar because the electrons that are shared between the two atoms are concentrated in the Br atom.
CH₃Cl is polar because the C-Cl bond is polar, the CH₃Cl has a net dipole, so CH₃Cl is polar.
PCl₅, CH₄, N₂ are said to be non polar because, as a bond is formed between the two atoms, there is no difference in their electronegativity and the net dipole moment becomes zero.
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calculate the percent by mass composition of c (carbon) in the compound ch4 (round your answer to 3 significant figures at the end.) g
The percent by mass composition of c (carbon) in the compound ch4 is 10%.
How much carbon is there in CH4 by mass?As an example, let's look at methane, or CH4. Methane's formula weight is [12.01 + (4 x 1.008)] = 16.04 (grams per cubic meter). Methane has a mass that is made up of (12.01/16.04) x 100 = 74.87% carbon and (4.032/16.04) x 100 = 25.13% hydrogen.
Sulfuric acid's percentage makeup of each element: Hydrogen% is equal to (2.016/98.07) x 100, or 2.0556%. Sulfur% = 32.06 98.07 100 = 32.69% Oxygen% = (63.996/98.07) 100 = 65.25%.
(1) CO = 80% CH, equals 20%; (2) CO = 90% CH4 = 10%.
Confirm that about 82.6% of C4H10's mass is made up of carbon. The molar masses of hydrogen and carbon on the periodic table are, respectively, 12.0 and 1.01.
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N2 + 3H2 → 2NH3
How many grams of NH3 could be made using 6 moles of H2 and excess N2?
__________ g of NH3
Answer:
68grams
Explanation:
Simply because if 3 moles = 2(14 + 3)
3 moles = 34 grams
6 moles = (6 × 34) ÷ 3
= 68grams
What type of solid will each of the following substances form in its solid state? Choices to considerare metallic, ionic, covalent, or molecular solids. a. CyH6 d. Co,-molecular g. AI b. Nazo e. N:Os h. C(diamond) c. sio, - Covalent f. NaNO3 i. SO
a. CyH6 - Molecular solid, b. Na - Ionic solid, c. SiO2 - Covalent solid, d. Co - Metallic solid, e. N2O - Molecular solid, f. NaNO3 - Ionic solid, g. Al - Metallic solid, h. C(diamond) - Covalent solid, i. SO2 - Molecular solid
CyH6, N2O, and SO2 are molecular solids, as these compounds are composed of individual molecules that are held together by weak intermolecular forces. Na is an ionic solid, as it is composed of positively charged sodium ions and negatively charged chloride ions held together by strong electrostatic forces. SiO2 is a covalent solid, as it is composed of individual Si-O covalent bonds.Co is a metallic solid, as it is composed of a metallic lattice of metal atoms held together by metallic bonds. NaNO3 is an ionic solid, as it is composed of positively charged sodium ions and negatively charged nitrate ions held together by strong electrostatic forces.
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determine the chemical feed rate for the alum, the amount of alkalinity consumed by the reaction, and the amount of precipitate produced in mg/l and kg/day?
The amount of precipitate produced in mg/l and kg/day is 57.2753 kg.
What is precipitation?Precipitation is the process of changing a dissolved substance from a super-saturated solution to an insoluble solid in an aqueous solution.
Chemical feed rate :
60 mg per liter we need
60 grams per one m3
60 x 3800 grams = 228 kg per 3800 m³
Since the water flow per day is 3800 m³, alum consumption per day is 228 kg
Alkalinity: The alkalinity requirement for alum is 0.49 mole of alkalinity per one mole of alum. The precipitate formed: For one mole of alum, 2 moles of Al(OH)₃ will form.
So 621 g of alum reacts to form
2 x 78 g of Al(OH)₃ precipitate
228 x 1000g will form:
(228 x 1000 x 156)/621 = 57.2753 kg per day precipitate
Therefore, the amount of precipitate produced in mg/l and kg/day is 57.2753 kg.
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The question is incomplete. Your most probably complete question is given below:
Natural water with a flow of 3800 m3/d is to be treated with an alum dose of 60 mg/L.
Krista is saving money to visit her relatives in Florida. It costs $1,250 for the plane ticket and $250 per night for the hotel. Using the function that represents the cost c based on the number of nights n Krista spends in Florida, how many nights can Krista stay in Florida if she saves $3,500?
Krista can stay 9 nights in Florida if she saves $3,500.
What is linear function?The graph of a linear function is a straight line. The following is the form of a linear function.
a + bx = y = f(x).
One independent variable and one dependent variable make up a linear function. x and y are the independent and dependent variables, respectively.
Given:
Krista is saving money to visit her relatives in Florida.
It costs $1,250 for the plane ticket and $250 per night for the hotel.
Using the function that represents the cost c based on the number of nights n Krista spends in Florida,
f(x) = 250x + 1250.
If f(x) = 3500,
250x + 1250 = 3500
250x = 2250
x = 9
Therefore, she can stay for 9 nights.
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Give the name of the ion with 13 protons and 10 electrons
Answer:
Explanation:
aluminum
Answer: The aluminum ion
Explanation:
elect the incorrect statements(s).
1. Although ice, water and water vapour all look different and display different physical properties, they are
chemically the same.
2. During burning of a candle, both physical and chemical changes take place.
3. Both water and cooking oil are liquid but their chemical characteristics are different. They differ in odour
and inflammability.
4. It is the physical property of oil that makes it different from water.
(a) 1 and 2 (b) 2 and 3
(c) 1, 2 and 3 (d) Only 4
The incorrect statements are option (a) 1 and 2 :
1. Although ice, water and water vapor all look different and display different physical properties, they are chemically the same.
2. During burning of a candle, both physical and chemical changes take place.
What is physical properties?Although ice, water and water vapor all look different and display different physical properties, they are chemically the same. This statement is incorrect. Ice, water, and water vapor are all forms of water, but they are not chemically the same. They have different physical properties such as state, shape, and temperature.
Therefore, During burning of a candle, both physical and chemical changes take place. This statement is incorrect. Burning of a candle is a chemical change, where the wax is broken down into smaller molecules and is converted into carbon dioxide, water vapor and other gases.
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choose the k sp expressions for the following reactions. ca 3 (po 4 ) 2 (s) 3ca 2 (aq) 2po 4-3 (aq) k sp
The k sp expressions for the reactions is Ks is [Ca2+]3 and [PO4 3+]2.Ks (solubility product) is the result of multiplying the calcium ion concentration by the phosphate ion concentration.
Discover Ks (solubility product)?Ks (solubility product) is the result of multiplying the calcium ion concentration by the phosphate ion concentration. When salt is introduced to water, it dissolves and the molecules split apart into ions. The following equation can be used to express it:
Ca3(PO4)2(s) <—> 2PO4 3+ with 3Ca2+ (aq)
The molecule's state is indicated by the letters s and aq. S stands for solid, and AQ for aqueous.
K = [D]d. [C]c/ [A]a. [B]b is the formula used to represent this constant in chemical equilibrium.
One further thing to keep in mind is that the constant only accounts for gases and aqueous molecules; solids and liquids have no bearing on it. In the equation, values are replaced by 1, and the constant is not affected by solids or liquids.
Since Ca3(PO4)2 is now solid, it has no effect on Ks; in this situation, the only relevant concentrations are those of Ca and PO4. This ions' expression of Ks is because they are products.
Ks=[Ca2+]3 and [PO4 3+]2.
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which is would be the empirical formula of a compound that has 4 moles of oxygen and 10 moles of nitrogen?
The empirical formula for a compound is 2N2O if it contains 4 moles of oxygen and 10 moles of nitrogen. A compound is a material that results from the chemical bonding of two or more elements.
The two types of bonding that hold the atoms of a molecule together most frequently are ionic and covalent. In chemistry, a substance's empirical formula is the simplest whole number ratio of the atoms that are present in it. The simple illustration of this concept is the empirical formula of sulphur monoxide, which is just NO.
Nitrogen = 10/14 = 0.71 M of nitrogen = 4/16 = 1/4 = 0.2 M of oxygen
Atomic mass is equal to 0.2/0.2 and 1
Atomic mass = 0.71/0.2 = 3.6, or around 4, and empirical formula = 2N2O.
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a steel ball of mass 0.400 kg is fastened to a cord that is 0.600 m long and fixed at the far end. the ball is then released when the cord is horizontal. at the bottom of its path, the ball strikes a 2.00 kg steel block initially at rest on a frictionless surface. the collision is elastic. (a) Find the speed of the ball just after the collision.
(b) Find the speed of the block just after the collision.
(a) The speed of the ball just after the collision is 0.13636 m/s. (b) The speed of the block just after the collision is 0.272728 m/s.
(a) The speed of the ball just after the collision can be found using the conservation of momentum principle. Before the collision, the momentum of the system is zero (since the block is at rest). After the collision, the momentum of the system is equal to the momentum of the ball and the block moving together.
Let vf be the final velocity of the ball and block after the collision. Then, the initial momentum of the system is 0, and the final momentum is given by:
= 0.400 kg x vf + 2.00 kg x vf
= (0.400 kg + 2.00 kg) x vf
By solving, we get:
vf = 0.400 kg / (0.400 kg + 2.00 kg) x √(g x 0.600 m)
vf = 0.1732 x √(g x 0.600 m)
The speed of the ball just after the collision is given by:
v = vf x 0.400 kg / (0.400 kg + 2.00 kg)
= 0.1732 x √(g x 0.600 m) x 0.400 kg / 2.400 kg
= 0.0726 x √(g x 0.600 m)
= 0.0726 x √(9.8 x 0.600)
= 0.0726 x 1.8782971
= 0.13636 m/s
(b) The speed of the block just after the collision is given by:
v = vf x 2.00 kg / (0.400 kg + 2.00 kg)
= 0.1732 x √(g x 0.600 m) x 2.00 kg / 2.400 kg
= 0.1452 x √(g x 0.600 m)
= 0.1452 x √(9.8 x 0.600 m)
= 0.1452 x 1.8782971
= 0.272728 m/s
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based on the reading and your knowledge of environmental science, suggest a reason why nitrogen is typically present in the largest quantity in inorganic fertilizer.
One reason why nitrogen is typically present in the largest quantity in inorganic fertilizer is because it is an essential nutrient for plant growth.
What are fertilizers?
Fertilizer is a substance added to soil to provide plants with essential nutrients such as nitrogen, phosphorus, and potassium. The primary purpose of fertilizer is to increase crop yields and improve the overall health of plants. Fertilizers can be organic or inorganic.
Nitrogen is a key component of chlorophyll, the molecule in plants that allows them to absorb light and use it to photosynthesize. Without sufficient nitrogen, plants cannot produce enough chlorophyll and will not grow well. Nitrogen is also necessary for the production of amino acids, which are the building blocks of proteins, and for the synthesis of nucleic acids, which are necessary for cell growth and replication.
Another reason is that Nitrogen is abundant in the atmosphere, comprising 78% of it, and is relatively easy to convert to a form that can be used by plants. Nitrogen can be converted to ammonia, which is a common ingredient in inorganic fertilizers, through the Haber-Bosch process, which uses high temperatures and pressures to combine nitrogen and hydrogen.
Additionally, Nitrogen is relatively cheap and easy to produce, making it a cost-effective choice for fertilizer manufacturers.
In summary, Nitrogen is an essential element for plant growth, abundant and relatively easy to convert to a form that can be used by plants and cost-effective, that's why it is present in the largest quantity in inorganic fertilizers.
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Reaction 1: CO(g) + 3 H2(g) = CH4(9) + H2O(9) K (CH4] [H,O] (CO][1,13 Reaction 2 CO2(g) + H2(9) CO(g) + H2O(9) CO||H,0] (CO2][H.] Reaction 3: CH4(9) + 2 H2O(g) = CO2(g) + 4 H2 (9) K3 =? The chemical equations and equilibrium expressions for two reactions at the same temperature are given above. Based on the information, which of the following expressions can be used to calculate the value of K3 for reaction 3 at the same temperature? A K3=( - Kı) + (- K2) B K3= (- K1) - (- K2) с K3 = K x K2 D K3 = KK
An expressions can be used to calculate the value of K3 for reaction 3 at the same temperature is
K3 ⇒ ( - Kı) + (- K2)
To determine the value of K3 for reaction 3 at the same temperature, use the expression as
"K3 ⇒ (- K) + (- K2)".
This is thus because the concentrations of the reactants and products in a reaction affect the equilibrium constant for that reaction. Since reaction 3 is the result of the combination of reactions 1 and 2, it is possible to compute reaction 3's equilibrium constant by multiplying reactions 1 and 2's equilibrium constant. In the instance of this issue, it is clear that the results of reaction 1 and reaction 2 both serve as the reactants for reaction 3 and its products, respectively. The equilibrium constant of reaction 3 at the same temperature as reactions 1 and 2 is therefore
K3 ⇒ K1 x K2.
It's vital to remember that the temperature might have an impact on the relationship between the equilibrium constants of a reaction, making it not always possible to combine reactions to produce a new equilibrium constant.
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How much will the temperature a 60 g sample of iron (specific heat = 0.214 cal/g/*C) change if 2000 calories are added to it?
Answer:
37.36 degrees Celsius
Explanation:
The temperature change of a substance can be calculated using the formula:
ΔT = Q / (m * Cp)
Where:
ΔT is the change in temperature (in degrees Celsius)
Q is the heat added or removed (in calories)
m is the mass of the substance (in grams)
Cp is the specific heat capacity of the substance (in calories per gram per degree Celsius)
For a 60g sample of iron with a specific heat of 0.214 cal/g*C and 2000 calories added to it, the temperature change would be:
ΔT = 2000 / (60 * 0.214) = 37.36 degrees Celsius
during neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. which of the following helps establish the concentration gradient necessary for this process to occur?
The one which helps to establish the concentration gradient necessary for this process to occur is the Na⁺/K⁺ pump.
During neuronal signaling, a change in the membrane potential will cause the sodium channels to open and let the Na⁺ ions diffuse down the concentration gradient into the cell. The sodium - potassium pump is an enzyme. The sodium - potassium pump helps to maintain the osmotic equilibrium and the potential in the cells.
Thus, the Na⁺/K⁺ pump helps to establish the concentration gradient necessary for this process to occur.
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