The hydrologic cycle, another name for the water cycle, describes where and how water is kept on Earth.
How the flow of water regulated?In the atmosphere, on the surface of the land, and underground, water is kept in reserve. It could be a gas, a liquid, or a solid. Either fresh or salt water can be a liquid (salty).
Water flows between its storage locations. It flows on both extremely tiny scales and very big scales (via watersheds, the atmosphere, and below the Earth's surface) (in people, in plants, and in other organisms).
Water flows both naturally and as a result of human activity. The motion of water on Earth is sustained by the force of gravity and solar energy. The water cycle is impacted by human activity because it changes where water is.
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How many grams of nano3 will dissolve in 100g of water at 20 C?
Nano3, or sodium nitrate, is a highly soluble compound, 22.5 g of nano3 will dissolve in 100 g of water at 20° C.
How to calculate grams?At 20° C the solubility of NaNO3 is 74 g/100 g
Thus, 74 g of NaNO3 will dissolve in 100g of water.
What is solubility? The amount of a substance that will dissolve in the most amount possible in a given amount of solvent at a certain temperature is known as its solubility. Varied compounds have significantly different solubilities. Solubility is a distinctive attribute of a particular solute-solvent pair.The substance is more soluble in water the more polar it is. The high water solubility of BTEX chemicals contributes to their frequent occurrence in groundwater.Common examples of solutions include adding sugar cubes to a cup of tea or coffee. Solubility refers to the quality that makes sugar molecules more easily dissolved.For more information on solubility kindly visit to
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What type of chemical bond is cornstarch?
Starch is a complex carbohydrate that is a polymer of sugar molecules. The sugars in starch have OH bonds that can interact and stick together through a process known as hydrogen bonding.
A hydrogen bond is an electrostatic force of attraction between a hydrogen atom covalently bound to a more electronegative "donor" atom or group and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor—in chemistry.
Hydrogen bonding is not a covalent bond to a hydrogen atom, but rather a type of dipole-dipole attraction between molecules. The attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as an N, O, or F atom and another very electronegative atom causes it. Because hydrogen bonds have the strongest permanent molecular dipoles of any covalent bond, they have the strongest intermolecular forces for covalent compounds.
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Compounds are held together by chemical bonds, can be represented by a chemical
formula,
__(can or cannot) be broken down by a physical process, and are made
up of ___________ or more different elements.
cannot, two
can, two
cannot, one
can, one
Answer:
Cannot, two
Explanation:
The component elements of a compound can only be separated via a chemical reaction that breaks the atomic bonds that bind its molecules. Also, compounds are formed by 2 or more different elements.
Can you answer these for me please
Fluorine is the most electronegative among the group and tends more to gain an electron by chemical bonding. For the same reason, fluorine is more reactive than bromine. magnesium is more reactive than calcium because, Ca contains more inner electrons and experience shielding effect.
What is electronegativity?Electronegativity is the ability of an atomic nucleus to attracts its own electrons as well as the bonded electrons. Fluorine has the highest electronegativity than any element in periodic table.
F is more prone to be reactive since it needs gain an electrons to achieve stability. Cl has the same number valence electrons and but it contains more inner electron which shield each other. The most electronegative F will be more reactive in the group. For the same reason F is more reactive than Br also.
Potassium is more reactive than lithium because, potassium contains more loosely bound electron in its valence shell. Hence, it can be easily lose that electron through chemical bonding.
Magnesium is less reactive than Ca because, its valence electrons are more close to the nucleus. Whereas, Ca has one more shell in which the valence electrons are located which can be easily participated in bonding.
Similarly, oxygen is more reactive than sulfur, because, oxygen is highly electronegative and it tends to gain two electrons by reaction.
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Because a few alpha particles bounced back from the foil, Rutherford concluded that they were
a. striking electrons.
b. repelled by densely packed regions of positive charge.
c. magnetic.
A few alpha particles bounced back from the foil, Rutherford concluded that they were repelled by densely packed regions of positive charge. So the option b is correct.
Rutherford's experiment on scattering of α-particles showed for the first time that the atom has nucleus. He observed that the positively charged α-particles were repelled and deflected by the positive charges in the atom. Rutherford's named this positively charged portion of atom as nucleus.
As alpha particle is also positively charged and we know that same charges repel each other so a few alpha particles bounced back from the foil, Rutherford concluded that they were repelled by densely packed regions of positive charge.
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What is safe freezer temperature?
0 ° F is considered as a safe freezer temperature. Most germs are not killed by freezing, although it does halt them from multiplying.
What is safe freezer temperature?A freezer should generally be kept as close to 0°F as you can, with the exception of when you're adding a lot of fresh, warmer food. A flash freeze feature is available on some freezers, which lowers the freezer's temperatures for 24 hours to prevent freezer burn from temperature changes. For a few hours, you can choose to manually lower the freezer's temperature, but don't forget to adjust it back. Maintaining your freezer at a temperature that is too low may increase your energy costs and will result in food losing moisture and flavor. A freezer with a lot of ice buildup is a solid sign that the temperature is too low.For more information on freezer temperature kindly visit to
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What does the principle quantum number tell you?
What is the symbol we use for it?
What are shells?
Compare the energy in the 4th shell to that of the 3rd shell.
1) The energy level of the electron
2) The symbol is n
3) The shells correspond to the energy levels
4) The 4th shell has more energy than the 3rd shell
What is the quantum number?We know that the term quantum number has to do with the position of the electron in the atom. According to the Bohr model of the atom, the electrons that are found in the atom are said to have a specific energy and the electron can move from a lower to a higher energy level by the absorption of energy.
Given the fact that the principal quantum number can also be designated as energy levels or shells, we know that all the electrons that can be found in the atom are said to be classified into certain specific principal quantum levels.
Thus, when we have electrons in an atom, the most basic quantum number is the principal quantum number.
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What is the molarity of a solution containing 7.78 gram of urea in 203 gram of water?
The solution by dividing the number of moles of urea by the volume of the solution 0.637 M.
What is molarity?Molarity is a unit used to measure the concentration of a solution. It is defined as the number of moles of a solute per liter of a solution.
The molarity of a solution can be calculated by dividing the number of moles of solute by the volume of the solution. In this case, the solute is urea (NH2CONH2) and the volume of the solution is 203 grams of water.
To calculate the molarity of the solution, we first need to calculate the number of moles of urea present in the solution. This can be done by using the formula:
Moles of urea = (mass of urea (g))/(molecular weight of urea (g/mol))
Therefore, the number of moles of urea present in the solution is:
Moles of urea = (7.78 g)/(60.06 g/mol) = 0.129 moles
Now, we can calculate the molarity of the solution by dividing the number of moles of urea by the volume of the solution (in liters):
Molarity = (0.129 moles)/(0.203 liters) = 0.637 M
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The compound cobalt(II) nitrate, Co(NO3)2 is soluble in water. Write the net ionic equation for the dissociation reaction that occurs when solid cobalt(II) nitrate dissolves in water: specify states such as (aq) or (s).
The compound cobalt(II) nitrate, Co(NO3)2 is soluble in water. The net ionic equation for the dissociation reaction is Co(NO3)2 (s) = CO2+(aq) + Na3(aq) + PO4-(l).
In general, during the dissociation process in chemistry, molecules (or ionic compounds like salts, or complexes) separate or divide into different entities like atoms, ions, or radicals. This procedure is typically reversible. For instance, the covalent bond between an electronegative atom and a hydrogen atom is broken when an acid dissolves in water due to heterolytic fission, in a reaction which releases a proton (H+) and a negative ion. Dissociation is the antithesis of connection or recombination. Separation of the anions and cations occurs when salts are dissociated by solvation in a solution, such as water. The solvent can be evaporated in order to recover the salt. A substance that has free ions and can be employed as an electrically conducting medium is referred to as an electrolyte. In a weak electrolyte, the majority of the solute does not dissolve, whereas in a strong electrolyte, a higher proportion of the solute dissociates to generate free ions. A weak electrolyte is a material whose solute primarily occurs in solution as molecules (which are referred to as being "undissociated"), with a very tiny amount existing in solution as ions.
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Early tables of atomic weights (masses) were generated by measuring the mass of a substance that reacts with 1.00 g of oxygen. Given the following data and taking the atomic mass of hydrogen as 1.00, generate a table of relative atomic masses for oxygen, sodium, and magnesium. How do your values compare with those in the periodic table? How do you account for any differences?
The correct formula of the compounds is: H2O,Na2O, and MgO but I don't know if this would help
The Major Product Of The Following Reaction Would Be: I II III IV An Equimolar Mixture Of I And II
To solve such this we must know the concept of nucleophilic substitution reaction. Therefore, the correct option is option II. Primary alkyl halide are suitable for SN2 reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.
The characteristics of SN2 mechanism:
It is a nucleophilic substitution reaction.
Leaving group, a nucleophile, electrophile and a solvent are present
The product formed is the inverted product.
The attack of nucleophile is from backside of the leaving group.
The order of reactivity of alkyl halide is 1°>2°>3°.
Therefore, the correct option is option II.
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What is the total number of electrons shared between the atoms represented in this formula.
The total number of electrons shared between the atoms in the picture is: C. 4.
How to determine the total number of shared electrons between the atoms?Shared electrons are the electrons that are used in covalent bonding between two atoms. It occurs when electrons from an atom bond with electrons from the neighbor atom.
In the picture given, we can translate the formula as follows:
. . . . . . . .
: O = O : --> : O : : O :
From the representation above, we can conclude that 2 pairs of electrons are shared between the atoms (shown as a double bond). Hence, the total number of electrons shared is: 4.
This question is incomplete. The complete query is as follows:
“Given the Lewis electron-dot diagram for oxygen gas (O2). What is the total number of electrons shared between the atoms represented in this formula?
Choose one below:
1248”The formula of Lewis structure is attached below.
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What happens when pyruvate is broken down?
Pyruvate enters mitochondria and then enters the Krebs cycle, where it is broken down into carbon dioxide and water to produce ATP and other byproducts, which then enter the electron transport chain to produce more ATPs.
The citric acid cycle is regulated by calcium ions by activating pyruvate dehydrogenase, the first component of the pyruvate dehydrogenase complex reaction that produces acetyl-CoA. The cycle converts acetyl coenzyme A (acetyl CoA)'s chemical energy into the reducing power of nicotinamide adenine dinucleotide (NADH).
The Krebs cycle, also known as the TCA cycle (tricarboxylic acid cycle) or the Citric acid cycle, is a series of enzyme-catalyzed reactions that occur in the mitochondrial matrix and involve the oxidation of acetyl-CoA to form carbon dioxide and the reduction of coenzymes to generate ATP in the electron transport chain. The citric acid cycle is the mitochondrial hub for the final stages of carbon skeleton oxidative catabolism for carbohydrates, amino acids, and fatty acids.
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What is the formula for Mononitrogen tetrafluoride ?
Answer:
NF[tex]_{4}[/tex]
Explanation:
Mononitrogen tetrafluoride is a simple inorganic compound consisting of a single nitrogen atom bonded to four fluorine atoms. The formula for mononitrogen tetrafluoride is therefore simply NF4.
Provide an IUPAC name for the structure shown ball & stick (Use cis/trans terms for cyclic structures. Do not specify stereochemistry in other cases. It is not necessary to use italics in writing compound names.)
The IUPAC name for the structure shown ball and stick is methyl derivatives of cyclobutanol.
What are IUPAC names?An IUPAC name will typically have three key characteristics: a major chain or ring of carbon atoms found in the molecular structure, also known as a root or base. A suffix or additional element(s) denoting potential functional groups in the compound.
Whether in a continuous chain or a ring, the longest chain of carbons joined by a single bond serves as the basis for IUPAC nomenclature. According to a particular set of priorities, all deviations, whether multiple bonds or atoms other than carbon and hydrogen are denoted by prefixes or suffixes.
Therefore, IUPAC refers to the ball and stick-shaped structure as methyl derivatives of cyclobutanol.
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Answer the following questions. N OR N Would you expect the above compound to be aromatic? © Yes © No Choose the correct explanations for the aromaticity of the compound. Select all that apply. | The lone pairs on the nitrogen atoms do not contribute to aromaticity. The lone pairs on the nitrogen atoms do contribute to aromaticity. The lone pairs on the nitrogen atoms occupy sp2 hybridized orbitals. The lone pairs on the nitrogen atoms occupy sp3 hybridized orbitals. One of the lone pairs on the oxygen atom (inside the ring) occupies a p orbital, giving a continuous system of overlapping p orbitals containing six electrons. One of the lone pairs on the oxygen atom (outside the ring) occupies a p orbital, giving a continuous system of overlapping p orbitals containing six electrons.
The way that we can be able to know that the compound is an aromatic compound is that the compound has a continuous network of overlapping pi orbitals. Option B
What is aromaticity?We know that the term aromaticity has to do with the fact that the compound would have the same number of electrons that would correspond to the Huckel rule. If we look at the Huckel rule, we can nsee that the statement of the rule is that a specie would be aromatic if the specie has a total of n -1 number of pi electrons that are present in a molecule of the compound as we can see in the image that has been shown here.
Given that we have the compound as it has been shown, we can see that there is a continious stretch of the overlapping orbitals. The overlapping orbitals is how we can be able to know that the compound that is in question is an aromatic compound.
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Arrange the oxoacids of bromine according to strength. Strongest acid 0 L00 Weakest acid 100 Answer Bank 100 about us careers privacy policy terms of use contact us help
The strength of oxoacids increases as the number of oxygen atoms increases. Therefore, the strongest one is HBrO₄ >HBrO₃> HBrO₂> HBrO.
What is oxoacids?Oxoacids are inorganic acids containing oxygen atoms. Group 15 elements such as phosphorus, groups 16 elements such as sulfur, and halogens forms oxoacids.
The strength of oxoacids depends on the number of oxygen atoms and possible resonating structures. The more the number of possible resonating structures the more will be the strength.
Therefore, the order strength of the oxoacids of Br is as follows:HBrO₄ >HBrO₃> HBrO₂> HBrO.
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Your question is incomplete. But your complete question is as follows:
Arrange the oxoacids of bromine according to strength. HBrO, HBrO2, HBrO3, HBrO4.
If 0.1 M NaOH solution was used in this titration, which statement correctly explains point B on the curve?
O This is the equivalence point of the curve.
O 0.003 mol of OH ions are present in the flask at this point.
O 0.0005 is the number of excess moles of OH ions at this point.
O 0.0005 is the number of moles of H* ions present at this point.
Answer:
The correct statement is: O This is the equivalence point of the curve.
Explanation:
The equivalence point is the point in a titration where the number of moles of acid added is equal to the number of moles of base needed to neutralize the acid. At this point, the acid and base react to form water and a salt. The pH at the equivalence point depends on the strength of the acid and base being used and the total volume of the solution. In general, the pH at the equivalence point will be higher for a strong acid-strong base titration than for a weak acid-strong base titration.
in a laboratory experiment, a student found that a 195-ml aqueous solution containing 2.494 g of a compound had an osmotic pressure of 12.2 mmhg at 298 k. the compound was also found to be nonvolatile and a nonelectrolyte. what is the molar mass of this compound?
The compound's mole ratio in a laboratory setup is 3125.12 g/mol, according to the statement.
Water: an electrolyte or not?Water that is completely free of ions is said to be pure. This could conduct electricity as a result. The inclusion of ions in the mixture allows the solution to carry an electric current when other substances, such as ionic compounds, are dissolved in water.
Briefing:Osmotic pressure is given by;
π = C * R * T
∵ 760 mmHg = 1 atm
10.3 mmHg = 1 * 12.2/760 atm
= 0.016 atm
π = no. of moles * R * T/volume (L)
π = Weight (g) * R * T / Molar mass * V (L)
0.016 atm = 2.494 * 0.082 L atm K⁻¹ mol⁻¹ * 298 K/ M.W * 195 * 10⁻³
M.W = 3125.12 g/mol
Consequently, the compound's molar mass is 3125.12 g/mol.
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48 moles of NaOH to grams of N2?
2NBr3 + 3NaOH = N2 + 3 NaBr + 3HOBr
Taking into account the reaction stoichiometry, a mass of 448 grams of N₂ is formed when 48 moles of NaOH reacts.
Reaction stoichiometryIn first place, the balanced reaction is:
2 NBr₃ + 3 NaOH → N₂ + 3 NaBr + 3 HOBr
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
NBr₃: 2 molesNaOH: 3 molesN₂: 1 moleNaBr: 3 molesHOBr: 3 molesThe molar mass of the compounds is:
NBr₃: 253.7 g/moleNaOH: 40 g/moleN₂: 28 g/moleNaBr: 102.9 g/moleHOBr: 96.9 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
NBr₃: 2 moles ×253.7 g/mole= 507.4 gramsNaOH: 3 moles ×40 g/mole= 120 gramsN₂: 1 mole ×28 g/mole= 28 gramsNaBr: 3 moles ×102.9 g/mole= 308.7 gramsHOBr: 3 moles ×96.9 g/mole= 290.7 gramsMass of N₂ formedThe following rule of three can be applied: if by reaction stoichiometry 3 moles of NaOH form 28 grams of N₂, 48 moles of NaOH form how much mass of N₂?
mass of N₂= (48 moles of NaOH× 28 grams of N₂)÷ 3 moles of NaOH
mass of N₂= 448 grams
Finally, 448 grams of N₂ is formed.
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How many Mg ions are found in 1.00 mol of MgO?
The number of atoms found in a mole of compound has been given by relationship between the mole and the Avogadro number. The Avogadro number has been the constant that has been given by the number 6.023 × 10^23.
The relationship between the atoms and mole has been given by:
1 mole = 6.023 × 10^23 mg ions.
So, the number of mg ions that has been present in1 mole of the MgO has been equivalent to the Avogadro number.
Thus, 1 mole of MgO has 6.023 × 10^23 mg ions.
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John is doing a barbecue. He is using coal as fuel as he is cooking beef burgers.
Describe two chemical reactions that must happen in John's barbeque
Answer:
smoke
Explanation:
cause he must put a flame fire on the coal to heat the barbecue
The chemical reactions that must happen in John's barbeque the heat from your grill, frying pan, or toaster breaks down the proteins in your meal into amino acids in a process known as the Maillard Reaction. These amino acids then combine with the carbohydrates in the food to form this delicious brown mass.
What is Maillard Reaction ?The chemical reaction between amino acids and reducing sugars known as the Maillard process is what gives browned food its characteristic flavor. Foods that experience this reaction include grilled steaks, fried dumplings, cookies and other biscuits, breads, and toasted marshmallows.
By rearranging amino acids and particular simple sugars, which subsequently arrange themselves in rings and groups of rings that reflect light in such a way as to give the meat a brown color, the Maillard reaction specifically forms brown pigments in cooked meat.
Transformations of energy can be quite beneficial. For instance, when natural gas undergoes a chemical transformation in a furnace or grill. The gas' chemical energy is converted into heat energy, which cooks our food or keeps us warm.
Thus, the heat from your grill, frying pan, or toaster breaks down the proteins in your meal into amino acids in a process known as the Maillard Reaction.
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a solution of a compound in water conducts electricity, turns litmus red, and has a sour taste. what compound might be in the solution?
A compound's solution in water has a sour taste, colors litmus red, and conducts electricity.The substance in the solution can be acidic.Mg(OH)2
What is the common name for Mg OH 2?Magnesium(2+) hydroxide or Milk of Magnesia are other names for it.It is a major ingredient in antacids and naturally occurs as the mineral brucite.Magnesium hydroxide's chemical name is Mg(OH)2.
What use does Mg OH 2 serve?As an antacid, magnesium hydroxide is employed to treat heartburn and indigestion.It works by neutralizing the stomach's hydrochloric acid to produce magnesium chloride & water.
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What is the first step of an enzymatic reaction?
The first step of an enzymatic reaction is, substrate molecule (S) collide with enzyme(E) and react to form an intermediate compound called the enzyme-substrate (E–S) complex.
Enzymatic catalysis of a reaction between two substrates. The enzyme provides a template on which the two substrates are brought together in the correct position and orientation to react with each other. Enzyme-catalyzed reactions take place in at least two steps.
In the first step, an enzyme molecule (E) and a substrate molecule or molecules (S) collide and react to form an intermediate called an enzyme-substrate (E–S) complex. (This step is reversible, as the complex can dissociate into the original substrate or substrates and the free enzyme.) Once the E–S complex is formed, the enzyme is able to catalyze the formation of the product (P), which is then released from the enzyme surface:
S+E→E–S
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Is cornstarch a physical or chemical property?
The reaction between cornstarch and water comes under physical change this is because at the end of the reaction cornstarch remains as cornstarch.
There is no formation of any new substance but rather there is a web like arrangement between the cornstarch and the water molecules.
The combination of cornstarch and water results in the formation of a suspension having non-Newtonian properties.
This is comparable to quicksand. When hot water is added to the to cornstarch causes it stars to denature, resulting in a more gelatinous solid.
Cornstarch is typically composed of 27% amylose and 73% amylopectin.
During the reaction the size and viscosity of the cornstarch molecules increases.
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When 42 grams of potassium chloride KCl is dissolved in 100 grams of water at 50 ºC the solution can be correctly described as?
The solution can be correctly described as saturated solution.
What is saturated solution?
The chemical solution with the highest amount of a solute dissolved in the solvent is known as a saturated solution.
As clearly observed from the solubility diagram, the maximum amount (approx. 42 g) of KCl can be dissolve in 100g of water at 50°C. No more KCl will be dissolve in water at this temperature.
Saturated solution is a kind of solution that contains the maximum amount of solute being dissolve in solvent at a particular temperature.
Therefore, the solution can be correctly described as saturated solution.
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What are 3 uses of oxygen?
Answer: The main applications of oxygen in order of importance are: 1) melting, refining and manufacture of steel and other metals; 2) manufacture of chemicals by controlled oxidation; 3) rocket propulsion; 4) medical and biological life support; 5) mining, production and manufacture of stone and glass products.
Explanation:
What Is The Conjugate Base Of HBrO? (Hypobromous Acid) A. H+ B. H2BrO2 C. BrO- D. H2BrO+
The conjugate base of HBrO is BrO⁻.
In ionic equilibrium, we have a concept of conjugate base and conjugate acid.
According to bronsted lowry's acid and bases concept acid is defined as a substance that can donate a proton, and the base is defined as a substance that can accept a proton.
The base formed from acid is known as the conjugate base of the acid. Similarly, the acid formed from a particular base is called the conjugate acid of the base.
To form conjugate acid of HBrO, remove the hydrogen atom from HBrO.
Hence, the conjugate base of HBrO is BrO⁻.
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Which of the following options correctly describe the most common dry cell battery?
1. A half-reaction shows the electrons gained by the reactants in a galvanic cell.
2. The overall process occurring in a galvanic cell includes both an oxidation and a reduction reaction.
3. The two parts are each known as half-reactions.
The following options correct : 1. A half-reaction shows the electrons gained by the reactants in a galvanic cell.
2. The overall process occurring in a galvanic cell includes both an oxidation and a reduction reaction.
3. The two parts are each known as half-reactions.
A dry cell is the battery which is made up of one or more electrochemical cells and convert the stored chemical energy in to the mechanical energy. the given all of the options are correct for the half reaction cell as :
1. In the galvanic cell the electrons are gained by the reactant is the half reaction cell.
2. The oxidation and the reduction reaction in the galvanic cell shows the occurring of overall process.
3. The half - reaction is the two parts of the overall reaction that is oxidation half - reaction and the reduction half - reaction.
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what is a consquence of electron pair repulsion around an atom
Answer: Option c
Explanation: