The reaction catalyzed by Na-NQR (Sodium Nitroprusside) results in the transformation of a nitroprusside functional group (-N=C=S-) to a nitric oxide (NO) functional group.
The reaction catalyzed by Na-NQR (Sodium Nitroprusside) is a redox reaction that results in the transformation of a nitroprusside functional group (-N=C=S-) to a nitric oxide (NO) functional group. This reaction is an important part of the nitric oxide cycle, which is essential for the regulation of many physiological processes.
The reaction is catalyzed by the enzyme nitric oxide synthase, which is activated by the presence of Na-NQR. The reaction is a two-step process, with the nitroprusside functional group being reduced to a nitrosyl functional group in the first step, and then further oxidized to the nitric oxide functional group in the second step.
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You make a 100 mL solution by dissolving 5g of a solid solute in water. The molar mass of the solute is 110 g/mol. What is the molarity of the solution? If the density of the solution above is 1 g/ml, what is the concentration using units of percent by mass? (Percent by mass = g solute/g solution * 100) What is the difference between these two concentrations units? Why would you use one rather than the other?
(1) Molarity of the solution is 0.450 M (2) Percentage by mass is 5%. (3) difference between two concentrations is unit of measurement. (4) because it provides a measure of the concentration of a solute in a solution in relation to its total mass.
1) Molarity = (moles of solute) / (volume of solution in liters)
To find the moles of solute, divide the mass of solute by its molar mass:
moles = 5g / 110 g/mol = 0.045 moles
The volume of the solution is 100 mL, which is equal to 0.100 L:
Molarity = 0.045 moles / 0.100 L = 0.450 M
2) To convert to percent by mass, multiply the mass of solute by 100 and divide by the mass of the solution:
Percent by mass = (mass of solute / mass of solution) x 100%
Percent by mass = (5g / (100 mL x 1 g/mL)) x 100% = 5%
3) The difference between molarity and percent by mass is the units of measurement. Molarity is the number of moles of solute per liter of solution, while percent by mass is the mass of solute per hundred grams of solution.
4) Molarity is often used in chemical reactions, as it measures the number of moles of solute present in a solution, which is directly related to the amount of substance present and can be used to calculate the amounts of reactants and products in a reaction. On the other hand, percent by mass is commonly used in food and pharmaceutical industries, as it provides a measure of the concentration of a solute in a solution in relation to its total mass.
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what is the analyte in redox reaction
The analyte in a redox reaction is the substance undergoing oxidation or reduction.
A redox (reduction-oxidation) reaction is a chemical reaction in which the oxidation state of an atom changes. The substances undergoing this change are called the analyte, and one of them is oxidized (loses electrons) while the other is reduced (gains electrons). The oxidation and reduction reactions occur simultaneously, ensuring that the total charge in the system remains unchanged. The analyte in a redox reaction can be a molecule, ion, or an atom, and its oxidation state changes as a result of the transfer of electrons from one species to another. Redox reactions are fundamental in many biological, chemical and physical processes, such as cellular respiration, corrosion, and battery operation.
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in a sealed and rigid container, a sample of gas at 3.25 atm and 250.0 °c is cooled to 0.0 °c. what is the pressure (in atm) of the gas at 0.0 °c?
In sealed and the rigid container , the sample of the gas at 3.25 atm and the temperature 250 °C is the cooled to 0.0 °C. The pressure of the gas is 1.69 atm.
The Gay-Lussac's law expressed as :
P1 / T1 = P2 / T2
Where,
The P1 = initial pressure = 3.25 atm
T1 = initial temperature = 250 °C = 523 K
P2 = the final pressure = ?
T2 = final pressure = 0 °C = 273 K
Therefore , we get :
3.25 / 523 = P2 / 273
P2 = 1.69 atm
Thus the final pressure at the temperature of 0 °C is 1.69 atm.
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Which of these situations would produce a Hill plot with a Hill coefficient less than 1?A purified protein has multiple binding sites, and ligands bind to each site independently without affecting the binding affinity of other sites.A purified protein has multiple binding sites, and ligand binding to one site decreases the affinity of other sites for the ligand.A purified protein is a single polypeptide with two ligand‑binding sites, each having a different affinity for the ligand.A purified protein is a single polypeptide with one ligand‑binding site, but the sample is contaminated with some partially denatured protein molecules.
All of these situations would produce a Hill plot with a Hill coefficient less than 1.
A plot of log (Y/1-Y) vs log L is called a Hill plot, where n is the Hill coefficient. This equation is of the form: y = mx + b which is a straight line with slope n and y intercept of - log Kd. When two or more types of ligand-binding sites with different affinities for the ligand are present on the same or different proteins in the same solution, apparent negative cooperatively is observed. In (b) ,the higher-affinity ligand-binding sites bind the ligand first. As the ligand concentration is increased, binding to the lower-affinity sites produces an nH 0<1.0, even though binding to the two ligand-binding sites is completely independent. Even more common is situation.
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A substance’s flashpoint is the temperature at which it will explode.a. Trueb. False
Answer:
false. The flashpoint of a substance is the lowest temp at which it can vaporize to form an ignitable mixture in air.
What can be concluded from the diffraction pattern generated by a single electron fired in the double slit experiment?
Pairs of electrons are needed to generate an interference pattern.
Electrons are smaller than photons.
Electrons can act like macroscopic particles.
Single electrons interfere with themselves.
We can concluded from the diffraction pattern generated by a single electron fired in the double slit experiment, the correct option is (d) Single electrons interfere with themselves.
The double-slit experiment is a classic demonstration of wave-particle duality in quantum mechanics. When electrons are fired one at a time at a double-slit barrier, they produce a diffraction pattern on a detector behind the slits that is characteristic of wave-like behavior, even though electrons are generally considered to be particles. This result indicates that single electrons can interfere with themselves, demonstrating that electrons can exhibit both wave-like and particle-like behavior, depending on the conditions of the experiment.
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Is Br2 diamagnetic or paramagnetic?
Answer: paramatic
Explanation: as bromine has one unpaired electron in its valence shell, the bromine atom has paramagnetic nature. if that makes any sense
The quantum mechanical approach to atomic structure permits the calculation of?
Generally, the quantum mechanical approach to atomic structure permits the calculation of a region about the nucleus in which an electron of specified energy will probably be found.
By the help of quantum mechanics we can easily find the wave function that describes the movement of the particles, the interpretation of this wave function is done through the probability density (φ* φ).
This probabilistic interpretation of the energies, position and amounts of motion electrons often allow us to find the region around the nucleus where an electron of specific energy can be found with a given probability.
Hence, option B is correct.
The given question is incomplete and the complete question is given below.
The quantum mechanical approach to atomic structure permits the calculation of?
1. the most probable distance between any two specified electrons.
2. a region about the nucleus in which an electron of specified energy will probably be found.
3. the most probable radius of an orbit that an electron of specified energy will follow.
4. the most probable spin value that will be associated with an electron of specified energy.
5. the number of electrons in an atom.
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Read the entire procedure for the Introductory Activity. In step 5, why is it necessary to make sure the stopcock is in the open position and then immediately replace the stopper and syringe assembly in the Erlenmeyer flask after adding the hydrochloric acid to the marble chips?
When diluted hydrochloricacid is given to a reactive metal, hydrogen gas is created as a result of the addition of HCl to the reaction mixture that will result in the f.
Both hydrogen ions (H +) and chloride ions (Cl -) would be added to the equilibrium mixture if hydrochloricacid were to be added. Since hydrogen ions are on the right side of the equilibrium, it will shift to the left to make up for this, increasing the concentration of reactants. Because hydrogen ions are on the right side of the equilibrium, the equilibrium will move to the left to make up for this, which will increase the concentration of reactants.
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how many different elements are in sulfuric acid (h2so4)
Answer:
three 3
Explanation:
oxygen, sulphur and hydrogen.
what intermolecular forces are present in ch3nh2
The intermolecular forces are present in the given compound is CH₃NH₂ is the hydrogen bonding.
The intermolecular forces are the attractive forces or the repulsive forces that is present in between the molecules of the substances. The intermolecular force present in the CH₃NH₂ molecule is the hydrogen bonding. The hydrogen bonding is the intermolecular forces that is present between the hydrogen atom that is bonded with the high electronegative atom and the another highly electronegative atom which is in the vicinity of the hydrogen atom.
H H
| |
CH₃ - N ----- H - N - CH₃
|
H
Thus, the hydrogen bonding is present in the molecule CH₃NH₂.
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the reaction between hydrochloric acid and aluminum produces hydrogen gas and aluminum chloride. how many moles of h2 can be obtained when 3.20 mol hcl reacts with an excess of al ?
If 3.20 moles of HCl react with excess Al, then the moles of H₂ obtained are 3.2 moles.
The consequences of the chemical reaction are:
2 Al + 6 HCl → 3 H₂ + 2 AlCl₃
The first step is to calculate the moles of H₂ produced,
3.0 mol HCl gives = 3.0 mol H₂
So
3.20 moles of HCl will give = n moles of H₂
The second step is finding the mole n:
n = (3.20 moles × 3.0 moles) ÷ 3 moles
n = 3.2 mol H₂
So, the moles of H₂ is 3.2 mol.
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a solution contains 100mm pyruvate (pka = 2.45) and 10mm pyruvic acid. what is the ph of this solution?
The solution contains 100mm pyruvate with the pka = 2.45 and 10mm pyruvic acid. The pH of this solution is 3.45.
The Henderson Hasselbalch equation is as follows :
pH = pka + [salt] / [acid]
Where
The value pka = 2.45
Concentration of pyruvic acid = 10 mm
The concentration of pyruvate = 100 mm
By solving the value, we get :
pH = 2.45 + log [ 100 ] / [ 10 ]
pH = 2.45 + 1
pH = 3.45
Thus the pH of the solution is 3.45. The pH value less then 7 is for the acidic solution. The pH value more than 7 is for basic solution.
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Thiols and Sulfides The following molecule contains which functional group? O sulfoxide O sulfone O thiol O disulfide O thiolate O sulfide Save for LaterLOOK FIGURE
The molecules contains the the functional group called as the thiolate. The Alcohols are comparable to the thiols, and called as the mercaptans.
The thiol is a compound that will contains the –SH functional group, in which is the sulfur of the hydroxyl group or the alcohol group. The functional group is defined as the either a thiol group or the sulfhydryl group. The Sulfides behave the chemically differently from the ethers in the number of the significant ways. The conjugate base of a thiol is called as the thiolates in the chemistry.
Thus, the thiolate functional group is present in the molecule.
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A ga i compreed from an initial volume of 5. 50 L to a final volume of 1. 20 L by an external preure of 1. 00 bar. During the compreion, the ga releae 128 J of heat. What i the change in internal energy of the ga?
The change in internal energy of the gas is 123.7 J.
The change in internal energy of a gas can be calculated using the equation: ΔU = Q - W, where ΔU is the change in internal energy, Q is the heat added to or removed from the gas, and W is the work done on or by the gas.
In this case, the work done on the gas can be calculated as W = P * ΔV, where P is the pressure and ΔV is the change in volume. Since the pressure is 1.00 bar and the change in volume is 5.50 L - 1.20 L = 4.30 L, the work done on the gas is W = 1.00 bar * 4.30 L = 4.30 J.
Therefore, the change in internal energy of the gas is ΔU = Q - W = 128 J - 4.30 J = 123.7 J.
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in a total enthalpy calculation over several segments of a heating curve, which constant should be used to calculate the enthalpy change in the segment of the curve in which the substance is melting?
In a total enthalpy calculation over several segments of a heating curve, the constant should be used to calculate the enthalpy change in the segment of the curve in which the substance is melting is specific heat of solids
The enthalpy change is the change in energy from the start to the end of a chemical reaction. This relates to the law of energy immunity that energy cannot be created, but energy can be changed from one form to another.
The heating curve is a graph that states the change in temperature and the state of matter on heating. When a substance is heated, the graph on the curve will form a plateau which shows the phase transition. The melting point indicates the specific heat of the solid which is heated and melts from solid to liquid as it absorbs heat.
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When forty-five grams (45 g) of glucose, C6H12O6, is burned in the presence of oxygen gas, the products are sixty-six grams ( 66 g) of carbon dioxide, CO2, and twenty-seven grams (27g) of water vapor, H2O. What mass of oxygen gas was consumed in this reaction?
Input your answer numerically, without units.
The mass of oxygen gas consumed in the reaction would be 16 grams.
Stoichiometric problemGlucose burns in the presence of oxygen to produce carbon dioxide and water vapor according to the following equation:
[tex]C_6H_{12}O_6 + 6O_2 --- > 6CO_2 +6H_2O[/tex]
45 grams of glucose = 45/180.156 = 0.25 mol
66 grams of CO2 = 66/44.01 = 1.50 mol
27 grams of H2O = 27/18 = 1.50 mol
From the balanced equation, the mole ratio of the reactants to the products is 1:6:6:6.
In other words, the equivalent mole of the oxygen burned = 0.25 x 6 = 1.50 mol.
Mass of 1.50 mol O2 = 1.50 x 32 = 16 grams
In other words, the mass of oxygen consumed in the reaction is 16 grams.
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ABC + DAB+CD
ΔΗ
rxn
= -80 kJ/mol and Ea(fwd) = 185 kJ/mol.
Assuming a one-step reaction, calculate Ea(rev).
kJ/mol
The Ea of the forward reaction is 297.5 kJ/mole. The E of the products is 33.6 kJ/mole LOWER than that of the reactants, hence the negative value. Thus, the Ea of the reverse reaction requires 33.6 kJ/mole to get back to the starting point and then an additional 297.5 kJ/mole to reach the threshold. Total = 331.1 kJ/mole.
What is chemical reaction ?Chemical reaction is the process by which one or more compounds, known as reactants, change into one or more new ones, known as products. Chemical components or compounds make up substances. The atoms that make up the reactants are rearranged in a chemical reaction to produce various products.
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What are some ways we can measure how much energy a substance has?
The sum of all an object's atoms and molecules' energies makes up the substance's total energy.
What is a substance's total amount of energy?The sum of all an object's atoms and molecules' energies makes up the substance's total energy. Both the potential energy resulting from the interactions between molecules and the kinetic energy of the particles resulting from the motions of molecules within the material and of atoms inside molecules make up thermal energy.The equation q = m c T , where m is the mass of the sample, c is the specific heat, and T is the temperature change, may be used to determine how much heat is acquired or lost by a sample (q).
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how many ml of 4.55 m libr solution contain 1.87 mol of libr?
The volume of the 4.55 M LiBr solution that contains the 1.87 moles of the LiBr is 410.9 mL.
The molarity of the LiBr solution = 4.55 M = mol/L
The moles of the LiBr solution contains = 1.87 mol
The molarity is expressed as follows :
Molarity = moles / volume in L
The volume is expressed as :
Volume = moles/ molarity
Volume = 1.87 mol / 4.55 mol/ L
Volume = 0.4109 L
Volume = 410.9 mL
Thus, the volume in the mL is 410.9 mL with the molarity of the 4.55 M and the moles of 1.87 moles .
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For each compound, would you expect greater solubility in water or in hexane? Indicate the kinds of intermolecular forces that occur between the solute and the solvent in which the molecule is most soluble. a. glucose b. naphthalenec. dimethyl etherd. alanine (an amino acid)
Solute dissolves in the solvent according to the concept of 'like dissolves like '. That means polar solute dissolves in polar solvent and non-polar solute dissolves in non-polar solvent.
A) Glucose is a polar compound as it has polar bonds such as O-H ( As electronegativity of O is higher than H), thus it dissolves in polar solvent like water .
B) Napthalene being a non-polar molecule, it is soluble in non-polar solvent like hexane. The interaction present in napthalene is induced dipole - induced dipole interaction.
C) Dimethyl ether being non-polar molecule, it is soluble in non-polar solvent like hexane. The interaction present in napthalene is induced dipole - induced dipole interaction.
D) Alanine is a polar molecule. Hence, it dissolves in water through hydrogen bonding.
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the ability of water molecules to form hydrogen bonds with other water molecules and water's ability to dissolve substances that have charges or partial charges are group of answer choices both caused by water's two electron shells due to water's partial charges and low molecular mass, respectively both caused by water's partial charge both caused by water's ability to form covalent bonds with hydrophobic substances
The ability of water molecules to form hydrogen bonds with other water molecules and water's ability to dissolve substances that have charges or partial charges are respectively both caused by water's partial charge.
About water moleculeWater is a chemical substance with the chemical formula H2O: one molecule of water is composed of two atoms of hydrogen which are covalently bonded to one atom of oxygen. Water is colourless, tasteless and odorless under standard conditions, namely at a pressure of 100 kPa (1 bar) and temperature of 273.15 K (0°C).
This chemical substance is an important solvent, which has the ability to dissolve many other chemical substances, such as salts, sugars, acids, several types of gases and many types of organic molecules.
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which country produces the most carbon emissions total? How does this compare to its per capita carbon emissions?
China has the highest per capita carbon emissions worldwide, at 35.6 metric tons per person. Numerous countries in the Middle East have high levels emissions, particularly when compared to countries in Africa.
How does China approximate to its per capita carbon emission?The average Chinese person radiates quite a bit less than the average American. In 2019, China's per capita emissions reached 10.1 tons. By comparing, the US reached 17.6 tons, according to the Rhodium Group.
What causes carbon emission?Most carbon emissions are due to the use of fossil fuels, mostly for generation of electricity and heat, transportation, and manufacturing. Land use and forestry is another reason of carbon emissions, mostly due to deforestation.
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you add 9.2 g of iron to 23.60 ml of water and observe that the volume of iron and water together is 24.77 ml . calculate the density of iron.
The density of the iron in water is found to be 7.86 g/ml.
The mass of iron that is added to the water is 9.2 g and the volume of the water is 23.6 ml volume of iron and water is 24.77 ml.
The density of any substance is founded by dividing the mass of that substance by the volume of that substance.
Volume of iron can be calculated by subtracting the volume of water from the volume of the iron and water combined.
The volume of iron is 1.17ml.
So, the density will be,
Density = 9.2/1.17
Density = 7.86 g/ml.
So, the density of iron is 7.86 g/ml.
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how many lone pairs of electrons are assigned to the carbon atom in the lewis dot structure of carbon dioxide?
In carbon dioxide, there are no single carbon atoms. There are 2 lone pairs for each oxygen.
Each atom of oxygen in the [tex]CO_{2}[/tex] two electrons in the molecule are in lone pairs. The carbon atom does not contain any lone pairs. Between carbon and oxygen, double bonds are present.
In order for the octet rule to be followed, carbon must form a total of four bonds with the oxygen atoms. As a result, the carbon atom and the oxygen atoms must share four bond pairs. Obviously, they require two double bonds due to their numbers: O = C = O
However, for both oxygen atoms to adhere to the octet rule, they still require two additional electron pairs each. Therefore, we need to add two lone pairs to each oxygen atom.
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an electrolysis reaction produces 10.00 l of hydrogen gas in 6.0 minutes. calculate the rate of the reaction in ml/s 27.77
The rate of the reaction in mL/s can be calculated by dividing the volume of hydrogen gas produced (10.00 L) by the time it took for the reaction to occur (6.0 minutes).
This gives a rate of 27.77 mL/s. In this calculation, the volume of hydrogen gas produced (10.00 L) is divided by the time it took for the reaction to occur (6.0 minutes) to find the rate of the reaction in mL/s.
By dividing the volume of the gas by the time taken for the reaction to occur, we can determine the rate of the reaction.
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Name: Ellie Bair ♡
CONDUCTION, CONVECTION OR RADIATION?
CONDUCTION
THERMAL ENERGY
& heal
Frying an egg
Date: 1/26/23
Fill in each box with the following examples:
Frying an egg, boiling water, toaster, steam from a cup of tea, lava lamp, Ironing clothes,
baking a cake, using a space heater to keep warm when it's cold, the inside of your car
feeling hot on a Summer day, holding hands, chocolate melting in your hand
Heat is thermal energy and is classified into three types based on the type of transfer from the source to the target body through a suitable medium. They are conduction, convection, and radiation.
Conduction - The process by which heat energy transfers from one hot non-fluid body to a cold non-fluid body in contact without the movement of each is called conduction.
Convection - The process by which heat energy transfers from a hot fluid to a cold fluid in contact with a change in density and molecular movement is called convection.
Radiation- The process by which heat transfers from one hot body to another cold body without any contact or movement is called radiation. This transfer happens by air space.
Thermal energy - The form of energy concerned with the orientation of molecules in a body due to heat content is called thermal energy which is responsible for changes in temperature. These include latent heat, evaporation, and condensation.
The following are the types of heat transfer in the following examples;
Frying an egg - conductionBoiling Water - convectionToaster - convectionSteam from a cup of tea - convectionLava Lamp - convectionIroning Clothes - conductionBaking a cake - radiationUsing a space heater to keep warm when it's cold - convectionThe inside of a Car - convectionFeeling hot on a summer day- radiationHolding Hands - convectionChocolate Melting in hand - radiationHeat transfer depends on the type of medium as well. These media are; conductors, which allow heat to pass easily, insulators that do not allow heat to pass easily, and radiators that allow heat transfer with respect to adjoining air space.
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The moles is a counting unit defined as 1 mole = 6.022 × 10^23 objects. If you have a sample of 2.74 × 10-1 moles of H2O, how many oxygen atoms would the sample contain?
Enter the value using exponential notation, e.g. 1.23 × 104 would be entered as 1.23E4.
(value ± 2%)
If you have the sample of 2.74 × 10⁻¹ moles of H₂O, the number of the oxygen atoms the sample will contain is 1.6 × 10²³.
1 mole of substance = 6.022 × 10²³ atoms
The moles of the water = 2.74 × 10⁻¹ moles of the water
18 g of water in the 1 mole = 2.74 × 10⁻¹ moles of water
16 g of oxygen in the 1 mole = 2.74 × 10⁻¹ atoms of oxygen
The moles of the O atom = (1 × 2.74 × 10⁻¹ ) 6.022 × 10²³ atom of O
The moles of the O atom in water = 1.6 × 10²³ atom of O
Thus, the number of the oxygen atom is the 1.6 × 10²³ atom of O.
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with regard to the carbon skeleton shown below, how many carbon atoms are primary? secondary? tertiary? quaternary? be sure to answer all parts.
The term carbon skeleton is defined as the pattern in which the carbon atoms are bonded together in a molecule, disregarding atoms of other elements and differences between single and multiple bonds. In the given carbon skeleton there are 5 primary carbon, 5 secondary carbon and 3 tertiary carbon.
According to the carbon skeleton given in the question given above, there are,
5 primary carbon
5 secondary carbon
3 tertiary carbon
0 quaternary carbon
Primary carbon are defined as those which is attached to one other carbon atom only, secondary carbon are those which is attached to two other carbon atoms, tertiary carbon are those which is attached to three other carbon atoms, and quaternary carbon are those which is attached to four other carbon atoms.
The diagram of the carbon skeleton is attached in the image given below.
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what is the approximate ph of a solution prepared by mixing equal volumes of 0.05 m methylamine and 0.20 m hydrochloric acid?
1.125 is the approximate pH of a solution prepared by mixing equal volumes of 0.05 m methylamine and 0.20 m hydrochloric acid.
let V1= Volume of both methyl amine= volume of HCl
moles of methyl amine = V1*0.05
moles of hydrochloric acid = V1*0.2
The reaction between methyl amine and HCl is given by
CH3NH2+HCl-------> CH3NH3+ +Cl-
methyl amine is limiting reactant and hydrochloric acid is excess by=V*(0.2-0.05)=0.15V
Volume after mixing = V+V= 2V
Concentration of HCl = 0.15V/2V= 0.075 M
pH= -log (0.075)=1.125
In chemistry, pH is a scale used to quantify the acidity or basicity of an aqueous solution. It was traditionally denoted as "potential of hydrogen" (or "power of hydrogen"). Acidic solutions (solutions with greater H+ ion concentrations) have lower pH values than basic or alkaline solutions.
The potential difference between a hydrogen electrode and a standard electrode, such as the silver chloride electrode, is measured in a concentration cell with transference to derive primary pH standard values. A glass electrode with a pH meter, or a color-changing indicator, can be used to test the pH of aqueous solutions. pH measurements are critical in chemistry, agronomy, medicine, water treatment, and a variety of other fields.
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