Which reaction will occur if each substance is in it's standard state? Assume potentials are given in water at 25 C. Ni^2+(aq) + 2e- --> Ni(s) -0.28V Sn^4+(aq) + 2e- --> Sn2+(s) +0.15V Br2(l) + 2e- --> 2Br^-1(aq) +1.06V a) Ni2+ will oxidize Sn2+ to give Sn4+ b)Sn4+ will oxidize Br-1 to give Br2 c)Br2 will oxidize Ni(s) to give Ni2+ d)Ni2+ will oxidize Br2 to give Br-1
Answers
Forming \(Br_1\) and transferring electrons to the \(Br_2\) ions, reducing their oxidation state from 0 to -1. The standard reduction potential for this reaction is +1.83V, which is also known as the standard reduction potential for the reaction of nickel ions with aqueous bromide ions. Option d is Correct.
a) \(Ni_2+\) will oxidize \(Sn_2+\) to give \(Sn_4+\) -0.28V: This reaction occurs because \(Ni_2+\) is a stronger oxidizing agent than \(Sn_2+\), meaning it can donate electrons more easily. When these two substances react, the \(Ni_2+\) ions lose electrons to the \(Sn_2+\) ions, forming Ni(s) and transferring electrons to the \(Sn_2+\) ions, reducing their oxidation state from +2 to +1. The standard reduction potential for this reaction is -0.28V, which is also known as the standard reduction potential for the reaction of nickel ions with aqueous sodium ions.
b) \(Sn_4+\) will oxidize \(Br_1\) to give \(Br_2\) +1.06V: This reaction occurs because Sn4+ is a stronger oxidizing agent than \(Br_1\), meaning it can donate electrons more easily. When these two substances react, the \(Sn_4+\) ions lose electrons to the \(Br_2\) ions, forming \(Br_2\) and transferring electrons to the \(Br_1\) ions, reducing their oxidation state from -1 to 0. The standard reduction potential for this reaction is +1.06V, which is also known as the standard reduction potential for the reaction of tin ions with aqueous chloride ions.
c) \(Br_2\) will oxidize Ni(s) to give \(Ni_2+\) +0.76V: This reaction occurs because \(Br_2\) is a stronger oxidizing agent than Ni(s), meaning it can donate electrons more easily. When these two substances react, the \(Br_2\) ions lose electrons to the \(Ni_2+\) ions, forming \(Ni_2+\) and transferring electrons to the \(Ni_2+\) ions, reducing their oxidation state from +2 to +1. The standard reduction potential for this reaction is +0.76V, which is also known as the standard reduction potential for the reaction of bromine ions with aqueous nickel ions.
d) \(Ni_2+\) will oxidize \(Br_2\) to give \(Br_1\) +1.83V: This reaction occurs because \(Ni_2+\) is a stronger oxidizing agent than \(Br_2\), meaning it can donate electrons more easily. When these two substances react, the \(Ni_2+\) ions lose electrons to the \(Br_2\) ions. Option d is Correct.
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Related Questions
what volume of 0.140 mli2s solution is required to completely react with 130 ml of 0.140 mco(no3)2 ?
Answers
For the complete reaction of 130 ml 0.140 mole ,130 ml of 0.14 moles is required.
What is moles?
mole Is the unit of amount of substance in the international system of unit.
For the complete reaction of 130 ml 0.140 M CO (NO3)2, 130 ml of 0.14 is required.
The reaction of Li2S with CO(NO3)2 will be:
Li2S +CO(NO3)2-->2LiNO3+COS
Accordingly, 1 mole of Li2S completely reacts with 1 mole of CO(NO3)2.
moles of CO(NO3)2 - molarity Volume (L)
moles of = 0.140 M × 0.13 L
moles of CO(NO3)2 = 0.0182 moles.
The moles of Li2S reacts with CO(NO3)2 will be 0.0182 moles.
Volume of = Li2S= moles/molarity
Volume of = Li2S 0.0182/0.140
Volume of Li2S = 0.13 L
Volume of Li2S = 130 ml.
For the complete reaction of 130 ml 0.140 M , 130 ml of 0.14 is required.
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25cm3 of a 0.4M sodium hydroxide solution was diluted into 250cm3 of water. What is the molarityof the resultant solution.
Answers
Answer:
0.04 M
Explanation:
From the question given above, the following data were obtained:
Initial volume of solution (V1) = 25 cm³
Initial Molarity of solution (M1) = 0.4 M
Final volume of solution (V2) = 250 cm³
Final Molarity of solution (M2) =?
We can obtain the final Molarity of the solution by using the dilution formula as illustrated below:
M1V1 = M2V2
0.4 × 25 = M2 × 250
10 = M2 × 250
Divide both side by 250
M2 = 10/250
M2 = 0.04 M
Therefore, the resulting molarity of the diluted solution is 0.04 M
Examine the diagram of a cell. Which accurately labels the lysosome? W X Y Z
Answers
Answer: all of them
Explanation:
Answer:
The answers X i just took the test
Explanation:
What is symbol of microliter ?
Answers
The symbol of microliter is μL. It is defined as a unit of volume in the metric system.
Microliter is defined as a unit of volume in the Metric System. The symbol for microliter is μL. The base unit for this is liter and the prefix is micro. The prefix micro is derived from the Greek "mikrós" meaning small and it is symbolized as μ. It denotes a factor of one millionth (10-6) which means that there are 1,000,000 microliters in a liter. The symbol of microliter is μL.
1 μL = \(10^{-3}\) μL.
It is a small volume and that is measurable in a typical laboratory. The use of microliter volumes would be in preparation of an electrophoresis sample when isolating DNA or during chemical purification. This is measured and dispensed using micropipettes.
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Name a property copper has?
Answers
Answer:
Explanation:
It is malleable, ductile, and a good conductor of electricity and heat.
Iron oxide ore can be reduced using carbon to give pure iron. The chemical equation for this reaction is shown below. Work out the theoretical yield of iron if 80 tonnes of iron oxide ore are used, and then use your answer to find the percentage yield if only 40 tonnes of iron are actually produced. Give your answer to one decimal place. You will need some of the data from the table below.
Answers
The percentage yield of the iron is obtained as 71.4 %.
What is the theoretical yield?We know that the stoichiometry of a reaction can help us to be able to find the amount of the substances that have been used in a process. In this case, we have been shown the balanced reaction equation of the reaction in the image that have been attached to the question.
We can see that;
Mass of the iron III oxide = 80 tonnes or 8 * 10^7 g
Mass of iron produced = 40 tonnes of 4 * 10^7 g
Number of moles of iron III oxide reacted = 8 * 10^7 g/160 g/mol
= 5 * 10^5 moles
If 1 mole of iron III oxide produces 2 moles of iron
5 * 10^5 moles of iron III oxide produces;
5 * 10^5 moles * 2 moles/ 1 mole
= 1 * 10^6 moles
Theoretical yield of the iron = 1 * 10^6 moles * 56 g/mol
= 5.6 * 10^7 g
Percent yield = actual yield/Theoretical yield * 100/1
= 4 * 10^7 g/5.6 * 10^7 g * 100/1
= 71.4 %
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How many grams are in 9.05 x 1023 atoms of silicon
Answers
Answer:
42.2075 grams
Explanation:
Submit Test
Gr7_Sci_001_USA_FY21 Question: 1-4
An experiment was set up to test the hypothesis that all plants will grow faster in a "super soil" versus regular potting soil. Six identical plants were tested, three in the "super soil and three in regular potting soil. All plants
received the same amount of water, light and fertilizer. Which of the following items would improve the experiment?
more tynes of plante
Answers
Answer:
I THINK expose all six plants to green light
Explanation:
What is the number of molecules in 0.25 moles of hydrogen gas
Answers
Answer:
There are 1.5055X10^23 molecules present in 0.25 moles of Hydrogen gas.
Explanation:
We know,
1 mole of Hydrogen gas contains 6.022X10^23 molecules
∴ 0.25 moles of Hydrogen contains {(6.022X10^23) X 0.25} molecules
= 1.5055X10^23 molecules
So, there are 1.5055X10^23 molecules present in 0.25 moles of Hydrogen gas.
PLEASE HELP!!!! DUE SOON!!
Use the portion of the periodic table shown below to answer the questions.
A portion of the first three columns of the periodic table is shown. Column one from top to bottom reads 11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. Column two reads 12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. Column three reads 21 scandium 44.956 and 39 yttrium 88.906.
Part 1: Name two elements that have the same properties as magnesium (Mg). (4 points)
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences. (6 points)
Answers
Answer:
Explanation:
Calcium and Beryllium are similar to Magnesium because all the three elements belong to the same group and have 2 valence electrons in their outer shell.
Potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element.
which element would lose electrons during ionic bonding choose all that apply
mg
li
ca
cs
Answers
Answer:
All of them!
Explanation:
Since Mg, Li, Ca, and Cs are all in groups 1 and 2 of the periodic table, they are alkali/alkaline earth metals and will all lose electrons during ionic bonding.
is CO(NH2)2 and (NH2)2CO the same thing
Answers
Answer:
Explanation: the answer is YES
CO(NH2)2 and (NH2)2 CO is the urea
If a piece of jewelry were electroplated with gold for 25 seconds at 1. 5 a, how many grams of gold would be plated?.
Answers
The gold that would be plated from jewelry that is electroplated with gold for 25 seconds at 1.5A is 0.07 grams.
How many grams of gold would be plated?The gold that would be plated can be calculated according to the electrochemical equation which is AU ++ 1e-Au(s).
Now, electrochemical reaction will result the plating of 1 atom of gold for 1 electron. So for 25 seconds at 1.5 A, we get 1.5*25 = 37.5 coulombs of electrons since the ampere is equal to coulomb per second.
The number of electrons we have if coulomb of electrons about 6.241Ă*10^18 electrons is 6.241Ă*10^18*37.5 = 2.34*10^20. Then we can calculate the moles using Avogadro's number which is 2.34*10^20 / 6.02*10^23 = 3.88*10^-4.
Then, we can calculate the grams of gold by multiplying the number of moles by the weight of the atom gold. So, 3.88*10^-4 * 196.96657 = 7.65*10^-2.
Thus the number of gold that would be plated in grams is 7.65*10^2 or equal to 0.077 grams.
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What is the chemical formula of hydroxide ion?
Answers
Answer:
OH-
Explanation:
Compounds are made up of different kinds of atoms that are chemically combined. What do compounds have in common? A. They have the same color. B. They have the same melting point. C. They can be broken down into simpler substances. D. They cannot combine with one another to form more complex substances.
Answers
Answer:
D
Explanation:
They cannot combine with one another to form more complex substances. that's the answer
The compounds have in common is they cannot combine with one another to form more complex substances. The correct option is D.
What are compounds?Compounds are the substances made up of numerous similar molecules made up of atoms from different elements and kept together by chemical bonds. Therefore, a molecule made up of only one type of atom is not a compound.
There are different types of compounds that are made by combining of different substances. Like, ionic compounds are made by combining metals and non-metals.
Compounds are the substance that can into form further complex substance by combining with another substance because they are already made up of two or more substance.
Thus, the correct option is D. They cannot combine with one another to form more complex substances.
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What characteristic of an atom influences the behavior of the valence electron the most in an atom?
(Hint: Consider the charge of the particles)?
Answers
Answer:
The higher its electronegativity, the more an element attracts electrons.
Explanation:
Electronegativity is a property that describes the tendency of an atom to attract electrons (or electron density) toward itself. An atom's electronegativity is affected by both its atomic number and the size of the atom.
Is there any evidence that Mary experienced side effects from the medication that lead to her death?
Answers
There is no mention of Mary experiencing side effects from the medication that directly caused her death.
Side effects from medication can vary from person to person, and in some cases, they can be severe or even life-threatening. It is crucial to consult with a healthcare professional or refer to medical records for accurate information regarding any potential side effects that Mary may have experienced.
Additionally, adverse reactions to medication can occur but may not necessarily lead to death. To fully assess the situation, it is best to consult a medical expert who has access to all relevant information about Mary's case.
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a 1 liter solution contains 0.245 m nitrous acid and 0.327 m potassium nitrite. addition of 0.123 moles of potassium hydroxide will:
Answers
Addition of 0.123 moles of potassium hydroxide will increase the PH of the solution by several units .
Why the addition of 0.124 moles of potassium hydroxide will increase the PH by some units?PH is the basic term in chemistry which signifies the hydrogen ion concentration in a given solution.Here is given in a 1 liter solution is 0.245 molal nitrous acid and 0.327 molal potassium nitrite.And the question is asked of effect in the solution after the addition of 0.123 moles of potassium hydroxide in the same solution.See nitrous acid that is KNO2 is a strong acid , and KOH is a strong base so it will completely ionize in the solution.The k+ component of the KOH will react with nitrous that is NO2 component and will form KNO2 which is a weak base .So being basic in nature it will slightly increase the PH of the solution where in it will react.To know more about solution visit:
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Shown above is information about the dissolution of AgCl(s) in water at 298K. In a chemistry lab a student wants to determine the value of s, the molar solubility of AgCl, by measuring [Ag+] in a saturated solution prepared by mixing excess AgCl and distilled water. How would the results of the experiment be altered if the student mixed excess AgCl with tap water (in which [Cl−]=0.010M) instead of distilled water and the student did not account for the Cl− in the tap water?
Answers
Answer:
Value for K would be too small. Less AgCl would dissolve due to the common ion effect due to the presence of Cl- in the water.
Explanation:
Think of this through the lenses of a shifting problem. Cl- ions are a product in this situation and increasing its concentration would shift the reaction back to the solid AgCl. In this specific case, due to Cl- ions, AgCl would dissolve less to maintain equilibrium and as a result, the concentrations of Ag+ and Cl- ions would be lower than normal making a smaller K value.
In the solution of AgCl in tap water, the dissociation constant K has been decreased.
The dissolution of silver chloride in water results in the formation of silver ions and chloride ions.
The dissociation constant has been the amount of compound that has been dissociated into the constituent ions at equilibrium.
Dissociation constant for AgClThe dissociation constant has been dependent on the number of ions in the solution that has been present.
The common ion effect has been defined as the change in the dissociation constant for the compound with the presence of common ions in the solution.
The dissociation of AgCl in tap water has been resulted with presence of Cl ions in the solution. There has been early reach to the equilibrium in tap water.
Thus, with the solution of AgCl in tap water, the dissociation constant K has been decreased.
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A sample of neon gas has a pressure of 0.75atm at a temperature of 100K. The sample is heated to 400K. What is the pressure of the gas after it is heated?
Answers
The pressure of the gas after it is heated is 3 atm.
Strain is the pressure applied perpendicular to the floor of an object in step with the unit area over which that force is sent. Gauge pressure is the stress relative to ambient stress. various gadgets are used for specific stress.
Stress is described as the pressure of all of the gasoline particle/wall collisions divided by using the vicinity of the wall: All gases exert stress; it is one of the fundamental measurable quantities of this segment of relying on.
Stress is the bodily quantity of pressure that unfolds over a certain region. In different words, strain is a force in line with unit location. in case you take the amount of pressure being carried out on a frame, and divide it by the region of contact, you'll arrive at the pressure being carried out on the frame.
PV = nRT
P₁ = 0.75atm
T₁ = 100K
T₂ = 400K
V,n, and R is constant
P₁/T₁ = P₂/T₂
P₂ = P₁/T₁ × T₂
= 0.75atm / 100K × 400K
Pressure = 3 atm.
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You are delivering oxygen to a patient with a nasal cannula at 4 l/min when he begins to complain of a burning sensation in his nose. You should?
Answers
You are delivering oxygen to a patient with a nasal cannula at 4 l/min when he begins to complain of a burning sensation in his nose. You should attach an oxygen humidifier.
The nasal membranes may become dried up as a result of giving "dry" oxygen through a nasal cannula, in which case the patient may experience a burning sensation in their nose. The nasal membranes will remain moist thanks to the humidified oxygen. Medical equipment called oxygen humidifiers is used to humidify extra oxygen.
In dry conditions, a bubble-type humidifier often delivers long-lasting moisture for maximum patient comfort during oxygen therapy. The bubble humidifier is one of our most well-liked oxygen humidifiers. All potential sources of respiratory infections must be removed in order to lower the risk of infection for patients. Because the oxygen used in hospitals is a dry, irritating gas that can damage the respiratory mucosa if improperly humidified, oxygen humidifiers are frequently employed in medical facilities
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which substances are bases? check all that apply. a) hcooh. b) rboh. c) h2co3. d) ca(oh)2. d) nano3. e) hno3.
Answers
The substances that are bases are: b) RBOH (where R represents any organic group) and d) Ca(OH)2 (calcium hydroxide)
Bases are defined as substances that can accept or donate a pair of electrons (according to the Bronsted-Lowry definition) or substances that can produce hydroxide ions (according to the Arrhenius definition).
In the given options, RBOH is a general formula for any organic base, and Ca(OH)2 is a strong base used in various industrial processes.
HCOOH, H2CO3, NaNO3, and HNO3 are not bases as they do not fit the criteria mentioned above. HCOOH (formic acid) and H2CO3 (carbonic acid) are weak acids, NaNO3 (sodium nitrate) is a salt, and HNO3 (nitric acid) is a strong acid.
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what does alternate form mean
Answers
Answer:
different versions of existing forms
Explanation:
On what type of detection are the gas ionization chambers, semi-conductor chambers, and scintillator counters based
Answers
Gas ionization chambers, semi-conductor chambers, and scintillator counters are based on different types of detection methods. Gas ionization chambers, as the name suggests, detect ionization of gas molecules by radiation.
When radiation passes through the gas-filled chamber, it ionizes the gas atoms, creating charged particles. These charged particles are then collected by electrodes in the chamber, producing an electrical signal that can be measured and analyzed.
Semi-conductor chambers, on the other hand, utilize the properties of semi-conductor materials to detect radiation. In a semi-conductor chamber, the radiation interacts with the semi-conductor material, causing the generation of electron-hole pairs.
Lastly, scintillator counters use scintillators, which are materials that emit light when they interact with radiation. When radiation interacts with the scintillator material, it excites its atoms or molecules, causing them to emit photons of light.
In summary, gas ionization chambers rely on the ionization of gas molecules, semi-conductor chambers detect the generation of electron-hole pairs in semi-conductor materials, and scintillator counters detect the emission of light from scintillator materials.
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Ne + C, which bonding is?
Answers
Answer:
bonding conductor
Explanation:
they have bond of conductor between them.
............................
Answers
Answer:
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Explanation:
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ultraviolet and ____ rays are harmful rays emitted during arc welding.
Answers
Ultraviolet and infrared rays are harmful rays emitted during arc welding.
During arc welding, an intense electric arc is generated, producing various types of radiation. Ultraviolet (UV) rays are one form of harmful radiation emitted during the welding process. UV rays have a shorter wavelength than visible light and can cause damage to the skin and eyes, leading to sunburn, skin aging, and even long-term health risks such as skin cancer.
In addition to UV rays, infrared (IR) rays are also emitted during arc welding. IR rays have longer wavelengths than visible light and can generate heat. Prolonged exposure to IR rays can cause thermal burns and skin damage.
To protect against the harmful effects of UV and IR radiation during arc welding, welders typically use personal protective equipment (PPE) such as welding helmets with shaded lenses or filters. These lenses are designed to block or reduce the transmission of harmful UV and IR rays while allowing safe levels of visible light to pass through, ensuring the welder's safety.
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what is the coordination number of cobalt in the complex ion [co(en)cl4]–? (en = ethylenediamine)
Answers
The coordination number of cobalt in the complex ion [Co(en)Cl4]⁻ is 6.
Therefore the answer is 6.
The coordination number of a metal ion in a complex ion refers to the number of ligands (molecules or ions that bind to the metal ion) that are coordinated or bound to the metal ion. In the complex ion [Co(en)Cl4]^-, the metal ion is cobalt (Co) and the ligands are the ethylenediamine (en) and chloride (Cl) ions.
The complex ion [Co(en)Cl4]^- has six ligands coordinated to the Co ion: four chloride ions and two ethylenediamine molecules. This means the coordination number of cobalt in this complex ion is 6.
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Which symbol is the correct notation for the element silicon?
Responses
Si
Si
SI
SI
S
S
Sil
Answers
The correct notation for the element silicon is "Si".
Silicon is a chemical element with the symbol Si and atomic number 14.
It is a metalloid, meaning that it has properties of both metals and nonmetals. Silicon is the second most abundant element on Earth, after oxygen, and it is a major component of rocks, sand, and minerals. It is also a crucial element in many technological applications, particularly in the electronics industry, where it is used to make semiconductors, computer chips, and solar cells.
Silicon has a crystalline structure and is a hard, brittle, and blue-grey material. It is not found in its pure form in nature, but is instead obtained from the purification of silicon dioxide, which is commonly found in sand and quartz. Silicon is also found in various minerals, such as mica, feldspar, and talc.
Silicon has many unique properties that make it useful in various applications. For example, it is a semiconductor, meaning that its electrical conductivity can be controlled by adding impurities to it in a process called doping. This property is essential for the production of electronic components, such as transistors and diodes.
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Why Do Some Things Stop While Others Keep Going?
Answers
Answer:because they run out of energy when it is transferred and to other objects, or their kinetic energy
Explanation: