Yes. The pH of 3.7 should be the equivalency point.
Methyl orange is employed as a strong acid and weak base indication for what reason?Methyl orange transforms from a basic to an acidic color during a strong acid weak base titration, making it a useful chemical indicator. In acidic and basic media, respectively, methyl orange exhibits red and yellow colors. In titration, the solution appears yellow at first because the pH is high.
Methyl orange is a frequently used pH indicator in titrations because of its easy-to-see color shift. Because it changes color at a weak acid's pH, it is frequently employed in acid titrations. Methyl orange turns red in an acidic medium while turning yellow in a basic one.
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show the calculation for determining the mass of sodium hydroxide pellets required to prepare 250.0 ml of a 0.10 m sodium hydroxide solution
The mass of sodium hydroxide pellets required to prepare 250.0 ml of a 0.10 m sodium hydroxide solution will be 1g.
The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
We divide the number of moles of solute by the total volume of liters of the solution to determine the molarity of a solution.
M = number of moles of solute × 1000
the volume of solution (mL)
Given, M = 0.10M
V = 250mL
The molar mass of sodium hydroxide = 40g
0.10 = [tex]x[/tex]/40 × 1000
250
[tex]x[/tex] = 1 g.
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What is most similar to ATP?.
The RNA molecule resembles an ATP molecule structurally, according to the claim made.
How do molecules differ from atoms?Single, neutral particles make up an atom. As neutral objects consisting with more than two atoms joined together, molecules are. A positively charged or negatively charged molecule is called an ion.
Is gold a molecule or an atom?The nucleus of the atom of gold has 79 protons. The number of electrons and protons in every neutral (charge-free) atom is the same. Although neutrons vary, they are often equal to or 1.5 times as numerous as protons (in smaller atoms) (larger atoms).
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52) Determine the group, period, valence electrons and group name of the elements below:
1s22s22p4
Answer: the element is oxygen
Explanation: I just learned electron configuration today and this is the only part I can help with. given 1s²2s²2p4 if you add up the exponents you can find how many electrons there are and therefore the element
If 30. 0 l of oxygen gas is cooled from 473 k to 274 k at constant pressure, what is the new volume of oxygen ?.
The new volume of oxygen If 30.0 L of oxygen are cooled from 473ºK to 274°K at constant pressure, is 17.38 L.
to calculate the new volume of oxygen we can use the charles law.
Where in Charles law of gases states that at constant pressure, volume of the gas is directly proportional to the temperature of the gas, i.e.
V∝T
According to the question,we can calculate the new volume of oxygen as below :
V₁/T₁ = V₂/T₂, where
V₁ = initial volume of gas = 30 L
T₁ = initial temperature of gas = 473ºK
V₂ = new volume of gas = ?
T₂ = new temperature of gas = 274ºK
On putting all these values on the above equation, we get
V₂ = (30)(274ºK) / 473ºK = 17.38 L.
Hence, the new volume of oxygen If 30.0 L of oxygen are cooled from 473ºK to 274°K at constant pressure, is 17.38 L.
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How many molecules of nitrogen gas can be present in a 2. 5 l flask at 323 k and 650 mm hg ?.
The number of molecules is 0.482 × 10²³ molecules.
The formula for an ideal gasPV= nRT
P = gas pressure (N/m²)
V= gas volume (m³)
n = moles of gas (mol)
T= absolute temperature of gas (kelvin)
We have,
Volume = 2.5 L
Temperature = 50°C (50+273 = 323 k)
Pressure of gas = 650 mmHg ⇒ (650/760 = 0.86 atm)
So,
PV= nRT
(0.86 atm × 2.5 L) = n (0.0821) (323)
n = 2.15 atm. L /26.52 atm. mol⁻¹.L
n = 0.08 mol
We have a number of moles of N₂ are 0.08 mol.
One mole = 6.022 × 10²³ molecules
X = n ( 6.022 × 10²³)
So, number of molecules:
0.08 × 6.022 ×10²³ = 0.482 ×10²³ molecules
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In an atom, the second energy level contains 4 orbitals.
What is the maximum number of electrons that can fill the
second energy level?
In second energy level, maximum 8 electrons can be filled.
How many electrons can hold the energy level?For the first four energy levels, the maximum number of electrons are as follows:
I Energy level: 2 electrons max.
II Energy level: 8 electrons max.
III Energy level: 18 electrons max.
IV Energy level: 32 electrons max.
The greatest number depends on how many orbitals are present at a certain energy level. A volume of space within an atom known as an orbital is where an electron is most likely to be found.
As a result, we may conclude that Energy level II has four orbitals and hence, requires eight electrons to completely occupy it.
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g calculate the volume in liters of a iron(ii) bromide solution that contains of iron(ii) bromide .
The volume in liters of a 1.29 mol/ L iron(ii) bromide solution that contains 0.275 moles of iron(ii) bromide is 213 mL.
given that :
molarity of iron(ii) bromide solution = 1.29 mol/L
moles of iron(ii) bromide in solution = 0.275 mol
the molarity expression is as follows :
molarity = moles / volume in L
volume in L = moles / molarity
= 0.275 / 1.29
= 0.213 mL = 213 mL
the volume of iron(ii) bromide solution is 213 mL.
Thus, The volume in liters of a 1.29 mol/ L iron(ii) bromide solution that contains 0.275 moles of iron(ii) bromide is 213 mL.
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how many grams of chlorine gas are produced in the following reaction from 0.490 g hydrogen and 50.0 g chlorine? which substance is the limiting reactant?
The HCl concentration formed is 17.6 g and the limiting reactant is hydrogen.
In this case, based on the information provided, the grams of HCl required can be calculated by first identifying the limiting reactants in moles of each reactant.
1:1 mole ratio
nH₂ = 0.490 g H₂ x 1 mol H₂ / 2.02 g H₂ = 0.242 mol H₂
nCl₂ = 50.0 gCl₂ x 1 mol Cl₂ / 70.9 g Cl₂ = 0.705 mol Cl₂
From this we conclude that hydrogen is the limiting reactant and use 1:2 molar ratio with HCl having a molar mass of 36.46 g/mol:
mHCl = 0.242 mol H2; x 2 mol HCI/1 mol H2. x 36.6 g HCl/1 mole HCl
mHCl = 17.6 g HCl
Therefore, the HCl concentration formed is 17.6 g and the limiting reactant is hydrogen.
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Calculate the change in temperature when one bottle (250 g) of ethanol is cooled from 45°C to 40°C.
5 °C
205 °C
85 °C
-5 °C
The change in temperature when one bottle (250 g) of ethanol is cooled from 45°C to 40°C is - 5 °C.
The energy entering to the system and energy releasing to the system cause the change in the temperature. the change in temperature can be calculated as : the subtraction of final temperature and the initial temperature. The change in temperature is given as :
change in temperature , ΔT = final temperature - initial temperature
the initial temperature = 45 °C
the final temperature = 40 °C
change in temperature = 40 °C - 45 °C
change in temperature = - 5 °C
Thus, The change in temperature when one bottle (250 g) of ethanol is cooled from 45°C to 40°C is - 5 °C.
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Water beads up on the surface of a waterproof coat. What can you say about the bonds in the molecules on the surface of the coat?
Answer: Molecules are not attracted
Explanation:
Answer:
The bonds must be non-polar.
Explanation:
The water molecules are polar, so they wouldn't be attracted to the surface. This means the water would bead up and curve away from the surface it landed on.
When water beads up, this happens because the water molecules are more strongly attracted to each other by the polar bonds than they are to the surface by non-polar interactions.
To summarize:
On a nonpolar layer, water beads up because the attraction to each other is stronger than the surface.
Hope this explained it well.
1 mole of an ideal ga i expanded from a volume of 1. 00 liter to a volume of 8. 93 liter againt a contant external preure of 1. 00 atm. How much work (in joule) i performed on the urrounding?
The work (in joule) performed on the surrounding when 1 mole of an ideal gas expanded from a volume of 1. 00 liter to a volume of 8. 93 liter against a constant external pressure of 1. 00 atm is 803 joules
we know that,
n = 1 mole
Vi = 1 L
Vf = 8.93 L
P = 1 atm
the work performed on the surrounding under constant pressure is given as can be calculated as below:
W = P∆V
W = P(Vf—Vi)
W = 1 atm × (8.93—1) L
W = 1 atm × 7.93 L
W = 8.93 Litre•atm
Given that,
1 Litre•atm = 101.3J
So,
W = 7.93 Litre•atm × 101.3J/Litre•atm
W = 803.309 J
W ≈ 803 J
Then the work done on the surrounding is approximately
803 joules
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A barge pulls a freighter ship with a constant net horizontal force of 7500 N and causes the ship to move through the harbor. How much work is done on the ship if it moves 2000m?
work done on the ship if it moves 2000m is 15×[tex]10^{6}[/tex]J
When an external pulling force is applied to an object, the object moves from one place to another or we can simply say that it changes its position. The amount of work required to move the object from its initial position to the final position is directly proportional to the force applied to the object.
Work done depends on two main components that is force and displacement of an object. The displacement of an object must happen along the line of action of the force in order for the force to do work on the object.
Work has units of energy because it is defined as an amount of (transferred) energy, so work usually has units of J (joules).
To calculate work the formula that we use is;
W = F × d, where W = work done, F = Force and d = distance
W = 7500N × 2000m
W = 15×[tex]10^{6}[/tex]J
Therefore 15×[tex]10^{6}[/tex]J of work is done on the ship.
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Methane is gas that is found in small quantities in earth's atmosphere. Methane is the simplest hydrocarbon, consisting of one carbon atom and four hydrogen atoms. It is a powerful greenhouse gas, flammable, and used as a fuel worldwide. Construct an explanation of how carbon and hydrogen combine to form methane.
Methane is combustible and utilized as fuel all around the world. It is a key element in natural gas. Dioxide & water vapor are produced when methane is burned in the oxygen-rich atmosphere.
What are the uses of oxygen?The energy-producing process that powers the metabolic functions of most living organisms, respiration, depends heavily on oxygen. All living things, including humans, depend on the air that we breathe to survive.
Who or what makes up oxygen?The non-metallic element oxygen occurs naturally as a compound. Two molecules of oxygen that are tightly bound together make up each molecule. Oxygen is in a gaseous state at ambient temperature due to its low melt and boil temperatures.
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which of the following statements is false about redox reactions?
a. Reduction is the gain of electrons. b. Oxidation occurs at the anode of an electrochemical cell. c. Oxidation is the loss of electrons. d. Oxidation and reduction cannot both occur in the same chemical reaction. e. Oxidation-reduction reactions involve the transfer of electrons.
A redox reaction involves oxidation one species and reduction of other species. Oxidation is the process of the lose of electron and it occurs at anode and reduction is the gain of electrons. Thus option d is false.
What are redox reactions?A redox reaction is a type of reaction in which both oxidation and reduction occurs each for different species. One reactant species oxidizes by losing electron into the other species and the species which gained the electron is reduced.
Oxidation is the process by which an element or group forms its higher oxidation state by losing electron. Reduction is the process by which an element forms its lower oxidation state through gaining electron.
In an electrolysis two electrodes undergo redox reaction where the electrode at which oxidation occurs is called anode and the electrode where reduction takes place is called cathode. Thus option c is incorrect.
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solid caf2 is shaken with a 0.010m solution of naf. what will be the concentration of ca2 ion in the resultant saturated solution? (ksp for caf2
CaF₂ (s) ⇄Ca (aq) + 2F (aq)
KP = [Ca²⁺][F]²
Use the stoichiometry of the reaction to prepare an ICE table showing the initial concentration of the common ion.
CaF2 (s) ⇄ Ca (aq) + 2F (aq)
initial 0 0.010
change +S +S
equili S 0.010+S
Kp = [Ca²⁺][F]²
= (S)(0.010+S)²
= S(0.010)²
S= KP/(0.010)²
= 4.0×10⁻¹¹/1x104
= 4×10⁻⁷ M
A saturated solution is a solution in which as many solutes as possible are dissolved. At a certain temperature, solutes can no longer dissolve in saturated solutions. A saturated solution can be made by dissolving more solutes until no more solutes are dissolved. If adding more solute does not dissolve it, the original solution is saturated. If the added solute dissolves, the original solution was unsaturated.
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Shelly has a beaker that contains fluid ounces of water. She pours out fluid ounces of water. Which expression can be used to find the number of fluid ounces of water that remain in the beaker?.
2 1/3 fluid ounce of water is still remains in the beaker.
What is fluid ounce?A fluid ounce is a unit of measurement for liquid volume. Commonly abbreviated fl. Oz. (or fl oz) means a single fluid ounce, or more commonly multiple fluid ounces. An ounce is a unit used to measure weight.
For the given case.
Amount of water in the beaker = 5 2/3 fluid ounces
Amount of water poured out = 3 1/3 fluid ounces
Remaining amount of water = 5 2/3 - 3 1/3
= 17/3 - 10/3 [mixed fractions converted into improper fractions]
= 7/3
= 2 1/3 fluid ounce [improper fraction converted into mixed fraction]
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Since the given question is incomplete, the complete question is as follows:
"Shelly has a beaker with 5 2/3 fluid ounces of water. She pours out 3 1/3 fluid ounces of water. Which expression can be used to find the number of fluid ounces of water that remain in the beaker?"
The hydrogen generated in this lab was a product of the reaction between magnesium and hydrochloric acid. Which of these reactants is the limiting reactant?.
Supply and the stoichiometric equation are used to identify the limiting reactant of these reactants. So, both reactants are able to act as limited reagents according to these conditions.
They limit how far reactions can go in terms of producing products because they are reactants with a finite supply.
Hydrogen gas is created in the following manner in a reaction between magnesium and hydrochloric acid:
[tex]Mg+2HCl[/tex] ------------> [tex]MgCl_{2} +H_{2}[/tex]
[tex]HCl[/tex] has two times the molecular weight of magnesium. As a result, no reactant will be limiting if both reactants are provided in the required proportion.
[tex]HCl[/tex] will become limiting if the amount of moles supplied is not at least twice that of [tex]Mg[/tex]. Furthermore, [tex]Mg[/tex] will be limited if the amount supplied is not equal to half the amount [tex]HCl[/tex] supplied.
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ASAP! PLEASE!
For the reaction below calculate how many moles HCI are produced with 17 g of H3P04.
PCI5 + 4 H20 --- > H3РО4 + 5 HCI
Answer:b
Explanation:
b
As velocity blank kinetic energy and potential
According to the given information As velocity increases kinetic energy and potential energy.
What is kinetic energy and give an example?Kinetic energy, which may be seen in the motion of an object, atom, or group of particles, is the electricity of motion. Every moving item uses kinetic energy, such as a person walking, a baseball being tossed, a piece of food falling from the a table, or a charge particle in an electromagnetic current.
Why does kinetic energy occur?When potential heat is produced, among other catalysts such as elastic forces or gravity, kinetic is generated. Motion is created by kinetic energy. The velocity of an object increases as force applied to it and it accelerates.
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The complete question is -
As velocity____kinetic energy and potential energy
the solubility product constant of silver chromate ag2cro4 is 1.12 x 10^-12 m. calculate the molar solubility of the salt.
The molar solubility of salt is 6.542 x 10⁻⁵ mol/L
What is molar solubility?It is the number of moles of solute in a saturated solution that is one litre in size. It is expressed in moles per litre.A compound's capacity to dissolve in a given substance is known as its molar solubility (M), which is a unit of measurement. Molar solubility is measured as moles/L and is more specifically the maximum number of moles of a solute that can dissolve in one litre of solvent. The solution is said to be saturated when the amount of solute it can dissolve in one litre of solvent equals the amount of moles dissolved in one mole of solvent.
There are several factors that affect M's value. The Ksp value of the solubility product constant is significant. Each compound's measure of how readily a substance dissolves has a fixed value. Calculating the value of M also requires knowledge of the chemical reaction's product-to-reactant ratio. The reaction's stoichiometry is what is meant by this
Co(OH)₂ dissociates in solution according to the equation:
Ag₂CrO₄ → 2Ag⁺ + CrO₄²⁻.
∵ Ksp = [Ag⁺]²[CrO₄²⁻] = (2s)²(s) = 4s³.
∴ 4s³ = 1.12 x 10⁻¹².
∴ s³ = 1.12 x 10⁻¹²/4 = 2.80 x 10⁻¹³.
∴ s = ∛(2.80 x 10⁻¹³) = 6.542 x 10⁻⁵ mol/L
Thus the molar solubility of salt is 6.542 x 10⁻⁵ mol/L
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which of these molecules are ketones? check all that apply. a a three carbon chain. all carbons are bonded to h atoms. b a three carbon chain. one outer carbon is bonded to an o h group. c a three carbon chain. the middle carbon is double bonded to an o atom. d a three carbon chain. one outer carbon is double bonded to an o atom and single bonded to an h atom. e a three carbon chain. one outer carbon is double bonded to an o atom and single bonded to an o h group. f molecule h 3 c o c h 3.
Answer:
ldk
Explanation:
ldk
We know that the concentration of oxygen in the graduated cylinder must be ________ the concentration of oxygen gas in the rest of the classroom. (greater than, less than, or equal to)
We know that the concentration of oxygen in the graduated cylinder must be greater than the concentration of oxygen gas in the rest of the classroom.
Why would someone use a graded cylinder?A Measuring Cylinder, also known as a graded cylinder, cylinder measuring cylinder, or mixing cylinder, is a piece of laboratory equipment used to measure the amount of liquids, chemicals, or solutions throughout the course of a typical lab session. Graduated cylinders offer greater precision and accuracy than standard laboratory flasks and beakers.
Graduated cylinders and beakers are examples of glassware used in laboratories that has a specialized use. The volumes of the liquid inside may usually be read more precisely with graduated cylinders. For blending and stirring liquids, beakers work well.
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I need help with a CER for science cause its due tmr
_____________________________________________
Malic acid that algae releases chemically reacts with the calcium carbonate in the marble surface of the Taj Mahal.
Write 3 Evidence and 3 Reasoning
The Sulphur and nitrogen oxides attain the higher environment and blend with water forming nitric acid and sulphuric acid after which come down at the floor of the earth with precipitation. This is known as acid rain.
The white marble of Taj Mahal in Agra consists of Calcium. Whenever there may be acid rain in Agra, the nitric acid and sulphuric acid come at the side of precipitates.
These acids react with calcium carbonate of marble to shape calcium sulphate and calcium nitrate at the side of carbon dioxide and water. Marble consists of carbonate minerals, usually calcite and dolomite. Barium isn't always found in marbles which shape the Taj Mahal. So, the alternatives containing barium are removed.
The acid rain has a pH of much less than 5.6. It has unfavorable consequences at the animal skin, marbles and agriculture etc.
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explain why the ionizational energy of
a. Al < Mg
b. S < P
c. B < Be
Ionization energy increases with increase in electronegativity. The ionization energy of aluminium is less than that of magnesium because it is easier to remove an electron from the p orbital than that from an s orbital.
What is ionization energy?Ionization energy is the minimum energy required to remove a valence electron from the atom. Thus it depends on the orbital and electronegativity of the atom.
In the case of magnesium the valence electrons are in s orbital and that of aluminium is p orbital. It is easy to remove an electron p orbital than that from a s orbital. Thus Mg has higher ionization energy than Al.
In the case of phosphorous, the valence shell is half filled making it highly stable and thus higher ionization energy. Out of the four valence electrons in p orbital of sulphur, one can be easily removed and thus has lower ionization energy.
In the case of Be the same can be applied,as in Mg, that removing its valence electron from s orbital is hard than to remove an electron from the p orbital of boron.
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in the nuclear equation: (2 points) 222 86 radon becomes 4 2 helium plus blank. the characteristics of the missing particle are . z
In the nuclear equation, 222 86 radon becomes 4 2 helium plus blank. The characteristics of the missing particle are Z=84, A=218.
4 2 helium is also known as alpha(α) particle. Helium atom contains 2 protons and 2 neutrons in it. During the α-decay, atom transforms into the another atom with atomic number less than 2 and a mass number less than 4. The sum of the subscripts on both side of the equation should be same. Therefore, the α-decay of radon is shown as
222 86 Ra→218 84 Z+4 2 He
Therefore, element which shows atomic number 84 is polonium(Po).
Hence, the characteristics of the missing particles are Z=84, A=218. Therefore, third option is correct.
Your question is incomplete but the complete question is
222 86 Radon becomes 4 2 Helium plus blank. The characteristics of the missing particle are
Z = 84, A = 220
Z = 88, A = 218
Z = 84, A = 218
Z = 85, A = 220
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what do you understand by the terms (i) reaction rate, (ii) rate constant, (iii) reaction order and (iv) activation energy
The rate of reaction is the speed of reaction. The rate constant is the proportionality constant in the equation . The reaction order is the relation between rate of reaction and concentration of reaction. The activation energy is minimum amount of energy extra required to produced the product.
1) The rate of reaction is the speed of reaction at which reaction takes place. the rate at which reactants are converted into the product.
2) The rate constant is the proportionality constant in the equation .
3) The reaction order is the relation between rate of reaction and concentration of reaction. there are several types of order of reaction : zero order, first order, second order and the mixed order.
4) The activation energy is minimum amount of energy extra required to produced the product.
Thus, The rate of reaction is the speed of reaction. The rate constant is the proportionality constant in the equation . The reaction order is the relation between rate of reaction and concentration of reaction. The activation energy is minimum amount of energy extra required to produced the product.
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Write the names of the reactants and products of photosynthesis and chemosynthesis.
please help I’ll do anything!!
Answer:
hydrogen
Explanation:
The diagram shows the potential energy for a reaction pathway. Part 1: describe how you can determine the total change in enthalpy and activation energy from the diagram, and if each is positive or negative. Part 2: describe how the curve will look if the reaction is exothermic. Be sure to mention changes in the potential energies of the reaction and products and the sign changes of the enthalpy. 
The activation energy of a reaction is the difference between the peak of the reaction profile and the energy of the reactants.
The change in energy that occurs during a chemical reaction can be plotted on a graph called a potential energy graph or sometimes a reaction progress curve. A potential energy diagram shows the change in the potential energy of a system as reactants are converted to products.
When a catalyst is added it provides the reactants with an alternative route to product formation by lowering the activation energy. Therefore, products are formed with lower activation energies. However, this does not affect the product's energy. This is seen in the diagram of the exothermic reaction below. By determining the rate constant k at various temperatures and applying the Arrhenius equation.
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how can the absorbance of the solution containing fescn2 be used to calculate the [fescn2 ] at equilibrium?
The absorbance of the solution containing FeSCN2 can be used to calculate the [FeSCN2] at equilibrium by using the following equation:
A = ε * b * [FeSCN2]
Where A is the absorbance of the solution, ε is the molar absorptivity of FeSCN2, b is the path length of the cuvette, and [FeSCN2] is the molar concentration of FeSCN2.
What is the purpose of iron III thiocyanate?
The ferric thiocyanate assay, which involves oxidizing ferrous to ferric ions and then complexing the latter with thiocyanate, is used to detect the presence of different oxidizers like lipid hydroperoxides and assess the effects of antioxidants.Thiocyanates have a variety of uses in the construction industry, agriculture, metal and steel industry, textile and fiber industry, and so forth.To learn more about fescn2, follow the link https://brainly.com/question/17095228
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