Answer:
[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} + 8 {H}^{ + } \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]
Explanation:
To balance any redox reaction the primary factor is to identify the species undergoing oxidation and reduction.
Below are the steps to identify species undergoing oxidation and reduction:
Calculate the oxidation number of each atom individually of reactants as well as product.find out the change in oxidation number from reactants to products.if the oxidation number of products are greater than reactants then the species undergone oxidation.if the oxidation number of products are lesser than reactants then the species undergone reduction.let's calculate oxidation number,
given reaction
[tex]{Fe}^{ + 2} +{MnO_4}^{ - 1} \rightarrow {Fe}^{ + 3} + {Mn}^{ + 2}[/tex]
Of reactant,
[tex]Fe = +2, {MnO_4}^{ - 1} \\ Let \: oxidation \: of \: Mn \: is \: x \: and \: Oxygen -2 \\ {MnO_4}^{ - 1} \rightarrow \: x + 4 \times ( - 2) = - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x + - 8 = - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x = + 8 - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x = + 7 \\ \fbox{ Mn \: +7, O \: -2}[/tex]
Of product,
[tex]\fbox{Fe \: +3, \: Mn \: +2}[/tex]
Now calculate the change in oxidation number
[tex]Fe = +3-(+2) = +1 \\ Mn = +2-(+7) = -5[/tex]
now balance the increase in oxidation number and decrease in oxidation number,
thus we require 5 Fe for 1 MnO4-,
Now putting these numbers as their coefficient,
[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2}[/tex]
now balance oxygen atom on product side by adding water,
since there are 4 oxygen atoms in reactants 4 water molecules will be there on product side.
[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]
now balance Hydrogen atom on reactant side by adding H+ ion, since there are 4 water molecules on product 8 H+ ion will be in reactants!
[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} + 8 {H}^{ + } \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Confirming the balanced reaction, by checking number of atoms and charge on reactant vs Product side.
Total number of Fe on reactant and product = 5
Total number of Mn on reactant and product= 1
Total number of Oxygen on reactant and product = 4
Total number of hydrogen on reactant and product= 8
Total charge on reactant side= 5×(+2)-1+8=17
Total charge on product side = 5×(+3)+1×(+2)=17
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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An ideal gas occupies 400ml at 270 mm Hg and 65°C. If the pressure is changed to 1.4 atm and the
temperature is increased to 100°C, what is the new volume?
Answer:
113 ml
Explanation:
PV = nRT remember T must be in Kelvin Volume in L
270 * .4 = n 62.4* 338.15
n = .005118
1.4 atm = 1.4 * 760 = 1064 mm
1064 * V = .005118 * 62.4 * 373.15
V = .113 l
Which of the following is the correct definition of nuclear energy? A. energy of an object due to the random motion of its atoms and molecules B. energy an object has because of its motion or position C. energy produced from the splitting of atoms D. energy resulting from the flow of charged particles, such as electrons or ions
Answer:
c. energy from splitting energy
Explanation:
Which metal would cause the greatest increase in the temperature of the water in the calorimeter: the
one with the higher specific heat, or the one with the lower specific heat? Explain.
(THE EXPLANATION IS IMPORTANT)
Answer:
The one with higher specific heat
Explanation:
A metal with the highest specific heat will cause the greatest increase in temperature of water in a calorimeter because the metal would hold more heat, and then transfer it to the water.
Answer:
[tex] \sf \: \fbox{Metal \: with \: the \: higher \: specific \: heat.}[/tex]
Explanation:
HEAT:
In the universe there are only two mods of Transfer of Energy one is Heat and another is Work. That's why Heat and Work are well knowns Path function.
Specific Heat:
The specific Heat of any material is the heat gained or released by the material to raise or fall it's temperature by 1°C per unit mass of the material.
The heat gained or released (Q) is directly proportional to the mass of substance(m) and rise or fall of temp(∆T)
given by the equation,
[tex]\sf \: s = \frac{Q}{m \Delta T} [/tex]
Where S is the proportionality constant also known as specific Heat.
S.I. unit of s is joule/kg-K
C.G.S unit is cal/gm °C.
Specific heat of water: s = 4200 J/kg°C
Coming to the next important term calorimeter,
Calorimeter:
We already knew above that heat is not a form of energy it's a mod of transfer of energy, consider One Energy converted from State A to State B then the total heat(Transferred energy) during the process is measured by a device known as Calorimeter.
Now, coming to your question.
Consider a metal, with lower specific heat (s), the equation we derived above tells that specific heat is directly proportional to energy per unit change in temperature, that means if specific heat will be low, lesser amount of Energy(Heat) will be produced which will cause the minor increase in the temperature.
Which is a contradiction hence the answer would be Metal with the higher specific heat.
This is the final answer!
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NEED HELP ASAP!!! As atmospheric carbon dioxide increases, the amount of carbon dioxide dissolved in the ocean _____.
Question 1 options:
increases
decreases
stays the same
Answer:
If temperature stays the same, the amount of carbon dioxide dissolved in the ocean would increase.
Explanation:
The carbon dioxide in the air ([tex]{\rm CO_{2}}\, (g)[/tex]) and the carbon dioxide dissolved in the ocean ([tex]{\rm CO_{2}}\, (aq)[/tex]) are in a solution equilibrium:
[tex]{\rm CO_{2}}\, (g) \rightleftharpoons {\rm CO_{2}}\, (aq)[/tex].
Assume that the concentration of carbon dioxide in the air ([tex]{\rm CO_{2}}\, (g)[/tex]) increased while temperature stayed the same.
By Le Ch[tex]^{}[/tex]atelier's Principle, the solution equilibrium [tex]{\rm CO_{2}}\, (g) \rightleftharpoons {\rm CO_{2}}\, (aq)[/tex] would shift to offset this increase in [tex]{\rm CO_{2}}\, (g)[/tex] concentration. Specifically, this equilibrium would reduce the amont of [tex]{\rm CO_{2}}\, (g)\![/tex] in the system by converting more atmospheric [tex]{\rm CO_{2}}\, (g)\!\![/tex] to [tex]{\rm CO_{2}}\, (aq)\![/tex] dissolved in the ocean. Therefore, the concentration of [tex]{\rm CO_{2}}\, (aq)\!\![/tex] dissolved in the ocean would increase.
Brainliest
Which choice is an example of the use of sound energy in everyday life?
batteries powering toys
fireplaces keeping people warm
lights helping people see
car horns preventing accidents
Answer:
car hornsss
Explanation:
they loud asl
Identify the false statement from the following.
A. London dispersion forces exist in all polar molecules.
B. Temporary charge imbalances in the molecules lead to London dispersion forces.
C. Hydrogen bond is type of dipole – dipole interaction.
D. London dispersion is the weakest among the intermolecular forces.
The false statement from the above is that: Temporary charge imbalances in the molecules lead to London dispersion forces.
What are the factors that affect London dispersion forces?Generally, the factors which affects the London dispersion forces a dispersion force are as follows:
Shape of the moleculesDistance between moleculesPolarizability of the moleculesHowever, London dispersion forces simply refers to a sort of temporary attractive force formed when electrons in two adjacent atoms occupy positions that make the atoms form dipoles.
So therefore, temporary charge imbalances in the molecules lead to London dispersion forces is a false statement
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i need help
please help by looking at the link
Answer:
the image is not clear....
what best describes the bonding in the compound ICl?
Ni(CO)4 how many moles of oxygen
A student is investigating the affect of different salts on melting points. Four patches of ice of equal size are roped off and a different type of salt is poured on each, one receives table salt (NaCl), one receives Calcium Chloride (CaCl2), one receives Potassium Carbonate (KCO3) and the fourth receives inert sand instead. Each patch receives an equal amount of salt or sand. What could the student investigate?
A. The air temperature near each ice patch.
B. How quickly the ice patches melt.
C. Amount of sand absorbed.
D. The amount of oxygen released as each ice patch melts.
Answer:
B
Explanation:
By finding how quickly the ice pathes melt you are able to tell how well the salt dissolves in water (ice is the solid form of H2O). Different types of salts will melt the ice at different speeds.
This is also the only answer choice that correlates with melting points so :)
What is ostwald process?? Give the first catalytic reaction of this process. .
Don't spam
Answer: Smelling salts and oxygen are introduced into a metal catalyst-containing tube (platinum). Typically warmed to get the reaction started. The alkali is then oxidized to produce nitric oxide.
Answer:
The Ostwald process is a chemical process used for making nitric acid. Wilhelm Ostwald developed the process, and he patented it in 1902. The Ostwald process is a mainstay of the modern chemical industry, and it provides the main raw material for the most common type of fertilizer production
Explanation:
The first stage of the Ostwald process involves the catalytic oxidation of ammonia into nitric oxide, using platinum as the catalyst. The nitric oxide is then transferred to a different oxidizing tower, where it is oxidized into nitrogen dioxide
Calculate: Describe the RGB value and color you would obtain with each combination described below. Use the Gizmo to check your answers.
RGB value Color
Yellow (255, 255, 0) and blue (0, 0, 255) ______________ ______________
Plum (120, 0, 120) and dark green (0, 120, 0) ______________ ______________
Teal (0, 90, 90) and bronze (185, 150, 0) ______________ ______________
In The RGB color model, colors are described in numerical codes which are written in brackets and separated by commas.
What is RGB model ?RGB model is a color ( additive ) which enables the addition of RED, Green and Blue colors which are the primary colors of light in various ways to produce different colors.
In RGB model the RGB values gets to display different colors when used on different devices hence it can not be described as a reference point for RED, Green and Blue colors.
Hence we can conclude that In The RGB color model, colors are described in numerical codes which are written in brackets and separated by commas.
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Attached below is the GIZMO image
13. Subtract 0.291 from 0.4
Answer:
0.109
Explanation:
0.4-0.291=0.109
If the length of a string increases 2 times but the mass of the string remains constant, the new density of the string will equal the original density multiplied by what factor?
If the length of a string increases 2 times but the mass of the string remains constant, the original density will be multiplied by a factor mathematically given as
v=1.414 times
Will the new density of the string equal the original density multiplied by what factor?Generally, the equation for the volume is mathematically given as
v = sqt(TL/m)
Where
density = mass/length
Therefore
[tex]v2/v1 = \sqrt{L2/L1}[/tex]
[tex]v2/v1 = \sqrt{2}[/tex]
In conclusion,v ratio will give us
v=1.414 times
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Calculate the cell potential for the galvanic cell in which the given reaction occurs at 25 °C, given that [Cd2+]=0.00190 M and [Au3+]=0.788 M . Standard reduction potentials can be found in this table. 3Cd(s)+2Au3+(aq)↽−−⇀3Cd2+(aq)+2Au(s)
For a [Cd2+]=0.00190 M and [Au3+]=0.788 M conc, the cell potential is mathematically given as
Ecell=1.98V
What is the cell potential for the galvanic cell?Generally, the equation for the Chemical reaction is mathematically given as
Cd2+(aq) + 2e – → Cd(s)
Au3+(aq) + 3e– → Au(s)
Therefore
Ecell=Ecell-0,0582/nlog
Therefore
Ecell=Ered-Eoxy
Ecell=1.498-(-0.403)
Ecell=1.901
In conclusion
Ecell=1,901-0,0592/6log(0,0016/0.88)^2
Ecell=1.98V
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what happens when ethanol reacts with alkaline potassium permanganate?
Answer:When ethanol is oxidised with alkaline potassium permanganate (alkaline KMnO 4) or acidified potassium dichromate (acidified K 2 Cr 2 O 7), ethanoic acid is formed. Alkaline potassium permanganate and acidified potassium dichromate are strong oxidising agents, as they provide oxygen for oxidising other substances in the reaction
Explanation:
what is packing fraction ?
state the formula used to calculate it.
thankyou ~
Answer:
please mark me brainliestExplanation:
Packing fraction is defined as a way of expressing the variation of isotopic mass from whole mass number (atomic mass). This fraction can have positive or can have negative sign. A positive packing fraction describes a tendency towards instability.The equation for packing fraction is: Packing fraction = (N atoms) x (V atom) / V unit cell. N atoms is the number of atoms in a unit cell. V atom is the volume of the atom, and V unit cell is the volume of a unit cell. Substitute the number of atoms per unit cell into the equation.A hydrogen bond can occur between:
A. Two oxygen atom surrounded by hydrogens.
B. Two hydrogen atoms on different molecules.
C. The two hydrogen atoms on a water molecule.
D. A hydrogen from one molecule and an oxygen from another molecule.
Answer:
A
Explanation:
it can occur between two hydrogen bonds
Determine the type of reaction: AgNO3 + Cu --> Cu(NO3)2 + Ag
a. Double displacement
b. single displacement
c. Decomposition
d. Synthesis
Answer:
b. single displacement
What are ways in which the body is gain and loses soduim?
Answer:
You gain sodium basically through the food you eat and lose it basically by excretion through urine,sweat
Consider the following equilibrium:
N2(g) + 3H2(g) ⇌ 2NH3(g) + 92 kJ
The forward reaction is
Select one:
a.
exothermic and entropy is increasing.
b.
exothermic and entropy is decreasing.
c.
endothermic and entropy is constant.
d.
endothermic and entropy is increasing.
e.
endothermic and entropy is decreasing.
Answer:
b.exothermic and entropy is decreasing
Temperature and _____________________ control the phase of a substance. A phase diagram is a graph of pressure versus temperature that shows in which phase a substance exists under different conditions of temperature and pressure. A phase diagram typically has ______ regions, each representing a different phase and three curves that ________________________ each phase.
Temperature and pressure control the phase of a substance. A phase diagram is a graph of pressure versus temperature that shows in which phase a substance exists under different conditions of temperature and pressure. A phase diagram typically has three regions, each representing a different phase, and three curves that separate each phase.
In a phase diagram, the three regions correspond to the three common phases of matter: solid, liquid, and gas. The curves that separate each phase are known as phase boundaries or phase transition lines. These curves represent the conditions (specific combinations of pressure and temperature) at which phase transitions occur, such as melting (solid to liquid), boiling (liquid to gas), or sublimation (solid to gas).
Each phase boundary on the phase diagram represents the equilibrium between two phases, and the triple point, where all three phase boundaries intersect, represents the conditions where all three phases coexist in equilibrium.
Phase diagrams are essential tools in understanding the behavior of substances under different temperature and pressure conditions and are used in various fields, including chemistry, physics, and materials science. They provide valuable information about the stability and existence of different phases and the conditions under which phase transitions occur.
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Learning task 1:compare and contrast mitosis and meiosis by filling up the table below.
The purpose of both mitosis and meiosis is to increase the number or population of cells in the body.
Compare mitosis and meiosis type of cell divisionMitosis produces two diploid (2n) cells that are identical to the original parent cell whereas meiosis produces four haploid (n) cells that are different from the original parent cell.
Mitosis occurs in somatic cells whereas meiosis occurs in reproductive cells.
So we can conclude that the purpose of both mitosis and meiosis is to increase the number or population of cells in the body.
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How many grams of rock salt, NaCl, do you need to add to a 3.78 kg of ice, to get the temperature
to drop to -19C?
1129.9 grams of rock salt, NaCl needs to be added to a 3.78 kg of ice, to get the temperature to drop to -19C .
What is freezing point depression?Freezing point depression refers to a property of solutions where addition of a solute lowers the normal freezing point of the solvent.
The Blagden's Law given as the equation above is used to determine the freezing point depression of ice:
[tex]ΔT = iK_fm[/tex]where;
ΔT = Change in temperature in °Ci = van 't Hoff factorKf = molal freezing point depression constantm = molality of the solute in mol solute/kg solvent.For NaCl, i = 2
Kf for water/ice = 1.86 °C kg/mol
molalityof NaCl = (mass/molar mass
l)/kg of ice
mass of NaCl = molality × mass of ice × molar massmolar mass of NaCl = 58.5
mass of ice = 3.78 kg
Let molality of NaCl = m
ΔT = 19 °C
Substituting the values:
19 = 2 x 1.86 °C kg/mol x m
m = 5.11 mol/kg
mass of NaCl = 5.11 × 3.78 × 58.5
mass of NaCl = 1129.9 g
Therefore, the mass in grams of rock salt, NaCl that needs to be added to a 3.78 kg of ice, to get the temperature to drop to -19C is 1129.9 g
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One way to identify the type of radioactive decay produced in a reaction is to pass the emission through an electric field. Describe the type of radioactive emission produced from the decay of uranium-
238 to thorium-234 and its reaction to the electric field
Decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.
What type of radiation is produced?In the decay of U-238, two gamma rays of different energies are emitted in addition to the alpha particle while on the other hand, in the decay of thorium-234 , beta rays are emitted.
So we can conclude that decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.
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What volume (in L) of 1.40 M FeBr₂ would be required to obtain 0.500 moles of Br⁻ ions?
The volume, in Liters, that would be required to obtain 0.500 moles of Br ions from 1.40 M FeBr2 will be 0.36 L
Stoichiometric calculationRecall that:
Molarity = mole/volume
In this case, molarity = 1.40 M and moles = 0.500 moles
Thus:
Volume = mole/molarity = 0.500/1.40 = 0.36 L
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What is the correct way of representing hydrogen gas alone, in a reaction??
Write the formula for each of the following...I'm not telling you what kind of compound it
is, you need to figure it out!!
a. strontium bromide___________
b. tricarbon tetraphosphide_________
c. beryllium phosphate__________
d. calcium phosphide__________
e. manganese (II) thiosulfate_____
f. nitrogen monoxide
Calculate the specific heat in J/(g·ºC) of an unknown substance if a 2.50-g sample releases 12.0 cal as its temperature changes from 25.0ºC to 20.0ºC. _________J/(g·°C)
Answer:
[tex]\fbox{c = - 4.01 \: joule/g°C}[/tex]
Step by step explanation:
Given:
Mass of given sample (m) = 2.50 g
Initial temperature (T1) = 25°C
Final temperature (T2) = 20°C
Heat Energy Q = 12 cal
To find:
[tex]Specific \: Heat \: c = \: ?[/tex]
Solution:
We know that,
Specific heat of any substance is directly proportional to the mass and change in temperature.
Represented by equation,
[tex]Q = mc \triangle T[/tex]
Where,
Q = Heat Energy
m = mass of given sample
c = specific heat
∆T = change in temperature
Substituting corresponding values,
[tex]Q = mc \triangle T \\ 12 = 2.5\times c \times (20-25) \\ c = \frac{12}{2.5 \times ( - 5)} \\ c = - 0.96 \: cal/g°C \\ [/tex]
We also know that,
[tex]1 \: cal = 4.184 \: joules[/tex]
multiplying above answer by 4.184,
[tex]c = - 0.96 \times 4.184 \\ \fbox{c = - 4.01 \: joule/g°C}[/tex]
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How are gluons involved in forces within the atom?
A. Electrostatic forces use gluons to hold electrons together .
B. Gluons cause protons to repel each other in the nucleus.
C. Gluons are emitted as radioactive particles by the weak nuclear force .
D. Strong nuclear forces act through gluons in the nucleus.
Answer:
D
Explanation:
Took the test!
Gluons act as exchange particles and are known as gauge bosons. They are involved in the forces within the atom as a strong nuclear force that binds the nucleus. Thus, option D is correct.
What is a strong nuclear force?A strong nuclear force is a type of interaction that is present inside the atom and involves the nucleus. They bind the quarks to make the neutron and the proton, sub-atomic particles.
The strong nuclear force holds the atomic nucleus together and depends on the spin but not the charge. These forces are due to the interaction between the gluons and are stronger than the chemical bonds. The exchange of the mesons results in nucleons that lead to a strong nuclear force.
Therefore, option D. the gluons are responsible for the strong nuclear forces that bind the nucleus.
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