It is given that its a combustion reaction, we know that the ending compounds are CO2 and H2O alone. To get this, we add O2 in a combustion reaction to our initial compound.
C8H18 + O2 ---> CO2 + H2O ( + trace amounts of C8H18 left) We are asked about the C8H18 left meaning we have a limiting reactant and it is not completely water and CO2 left due to the limiting reagent. So we are trying to find the excess reactant.
To balance the equation we must balance all molecules ;
2 C8H18 + 25 O2 ---> 16 CO2 + 18 H2O (not taking into account the combustion of air)
It is given that it is incomplete combustion so we must use the grams of product to calculate the amount of reactant used due to the limiting reagent
1.15 g H2O * ( 1 mol H2O / 18.01532 g H2O) *( 2 mol C8H18 / 18 mol H2O) * ( 1 mol C8H18 / 114.24 g C8H18) = 0.00111755 = 0.00118 g C8H18 reacted
11.8 g C8H18 in the initial reaction, 0.0118 g reacted to get 1.15 g H2O
11.8-0.00118 = 11.79882 = 11.8 g C8H18 left in the balanced equation (meaning almost none of it was reacted)
Learn more about balance equation reaction ; https://brainly.com/question/11322377?referrer=searchResults
#SPJ4
in a titration of 35.00 ml of 0.737 m h2so4, ml of a 0.827 m koh solution is required for neutralization. question 25 options: 25.8 62.4 39.3 1.12 35.0
In a titration of 35.00 mL of 0.737 M H₂SO₄, 62.4 mL of a 0.827 M KOH solution is required for neutralization.
What is Neutralization?The interaction of H+ ions and OH- ions produces water in a neutralization reaction, which occurs when an acid and a base react to form water and salt. A pH of 7 results from the neutralization of a potent acid and a potent base.
Calculation:
The balanced reaction is
H₂SO₄ + 2 KOH ⇒ 2 H₂O + K₂SO₄
The molarity M is the number of moles of solute that are dissolved in a given volume, expressed as:
number of moles = molarity × volume
For H₂SO₄
35.00 mL= 0.035 L (being 1,000 mL= 1 L)
Molarity= 0.737 M
Then,
number of moles= 0.737 M × 0.035 L
number of moles= 0.0258
So you must neutralize 0.0258 moles of H₂SO₄. Now you can apply the following rule of three: if by stoichiometry 1 mole of H₂SO₄ is neutralized with 2 moles of KOH, 0.0258 moles of H₂SO₄ are neutralized with moles of KOH =?
moles of KOH = 0.0516,
Then 0.0516 moles of KOH are needed.
Molarity= 0.827 M
number of moles= 0.0516
volume=?
Replacing in the definition of molarity: 0.827M = 0.0516 moles/ volume.
= 0.0516moles/0.827M = volume
volume = 0.0624 L= 62.4 mL.
Hence, 62.4 mL of a 0.827 m KOH solution is required for neutralization.
To know more about Neutralization, check out:
https://brainly.com/question/23008798
#SPJ4
place the steps in order from first to last for confirming the presence of lead(ii) ions in a sample.
The correct steps in order from first to last for confirming the presence of lead(ii) ions in a sample is i, iv, ii, vi, viii, iii, vi, v.
The chemical element of lead ion has the atomic number 82 and the letter Pb. It is a hefty metal with a higher density than the majority of everyday materials. Its melting point is rather low, and lead is soft and flexible. lead ion is a lustrous, slightly blue-tinged grey when it is first cut. A sample is a representative piece or one object taken from a bigger whole or group, especially when it is offered for inspection or displayed as proof of quality: specimen. A sample is a selection of individuals, things, or things used in study that is used for measurement out of a wider population. In order to be able to extrapolate the results from the research sample to the entire population, the sample must be representative of the population.
the complete question is:
place the steps in order from first to last for confirming the presence of lead(ii) ions in a sample.
i) The formation of a white and black precipitate confirms the presence of lead(II).
ii) Decant the liquid above the white precipitate and add hot water to the white precipitate.
iii) Decant the liquid and add K, CrO, to the liquid.
iv) Add HCI to the sample.
v) The formation of a yellow precipitate confirms the presence of lead(II).
vi) Decant the liquid and add HNO, to the liquid.
vi) Decant the liquid and add NH, to the white precipitate.
viii) The formation of a white solid confirms the presence of lead(II).
learn more about lead ion here
https://brainly.com/question/1782326
#SPJ4
what term is used to describe the thick mixture of liquid and solid used to form the chromatography column?
The dense mixture of liquid and solid utilized to create the chromatography column uses stationary phase and mobile phase. Silica gel is the most widely used stationary phase for column chromatography.
In what types of mixes is chromatography used?For the separation of complicated combinations of amino acids, peptides, carbohydrates, steroids, purines, and a lengthy list of simple chemical compounds, paper chromatography has evolved into a common procedure. On paper, inorganic ions can also be easily separated. Thin-layer chromatography is compared.
Which mixes are separated using column chromatography?A separation method used to separate soluble mixtures is chromatography. A mixture is mixed in a solvent and poured down a column that is filled with a solid substance in column chromatography.
Learn more about organic compounds here:
https://brainly.com/question/11761946
#SPJ4
how long on average would it take an oxygen gas molecule (o2) to diffuse a distance of 15.0 mm in air?
Diffusion takes place in the gas phase by the random motion of gas molecules. The thermal motion of gas particles at above absolute zero temperature is called molecular diffusion. Since, molecular diffusion occurs as a result of thermal motion of the molecules, it proceeds at a maximum rate in gases, at a lower rate in liquids, and at a still lower rate in solids.
The diffusion rate can be calculated by t=x²/(2D)
How to calculate the diffusion of gas at a particular distance?
Apply,
time= x²/(2D)
where
D= Diffusion constant = 10 ↑ -9 m²/s
x= distance =15 mm = 15 * 10↑-3 m
then, substitute
t= (15*10↑-3)²/2*10↑-9
=112.5 * 10↑ -3 sec
Thus, Diffusion of gas at a particular distance is
t =3.125* 10↑-5 hours
To know more about molecular diffusion, click on https://brainly.com/question/94094
#SPJ4
what is the mole fraction of ethanol c2h5oh in an aqueous solution that is 46 perccent ethanol by mass?
The mole fraction of ethanol C₂H₅OH in an aqueous solution that is 46 percent ethanol by mass is 0.25.
Given that :
ethanol by mass is 46 % = 46 g
mass of water = 54 g
the moles of the ethanol, C₂H₅OH = mass / molar mass
= 46 / 46
= 1 mol
the moles of the water , H₂O = mass / molar mass
= 54 / 18
= 3 mol
the total moles = 1 + 3 = 4 mol
The mole fraction of ethanol , C₂H₅OH = moles / total moles
= 1 / 4
= 0.25
To learn more about mole fraction here
https://brainly.com/question/23716500
#SPJ4
you heat 3.00 g of magnesium metal in a crucible, and it becomes a white product with a mass of 4.95 g. where did the other 1.95 grams come from?
Due to the oxygen from the air combining with the magnesium to form magnesium oxide, or MgO, the mass has increased.
The total mass of the magnesium increases when it is heated because magnesium combines with oxygen to generate magnesium oxide ( so it supported the hypothesis). It is oxygen that has caused the increased bulk.
Magnesium creates light intense enough to briefly impair your vision when it combines with oxygen. Magnesium burns so brightly because a lot of heat is released during the process. This exothermic process causes magnesium to donate two electrons to oxygen, resulting in the formation of powdered magnesium oxide (MgO).
Therefore, Due to the oxygen from the air combining with the magnesium to form magnesium oxide, or MgO, the mass has increased and hence the other 1.95 grams has come from oxygen.
To learn more about magnesium metal refer-https://brainly.com/question/20264445
#SPJ4
name the following iconic compound: CoNO2
Answer:
Cobalt;nitrite
Explanation: there is none that is the compound
Answer:
CoNO2 is an ionic compound and is composed of cobalt cation (having +2 valency) and nitrite anion.
Explanation:
The chemical formula of cobalt cation is Co2+ and the formula of nitrite ion is NO−2 . When writing the name of an ionic compound, the name of the cation is written first and then the name of the anion. So, the name of CoNO2 is Cobalt (II) Nitrite.
Brainliest, Please!how long (in hours) must a current of 2.32 amps be passed to produce 10.3 g of copper metal from a solution of aqueous copper(ii) chloride?
In 3.75 hours a current of 2.32 amps be passed to produce 10.3 g of copper metal from a solution of aqueous copper(ii) chloride.
According to Faraday's first law, the amount of chemical reaction that takes place at any electrode during electrolysis is proportional to the amount of electricity that is passed through the electrolyte.
According to Faraday's first law-
w= zit
w= (E/F) it
w- weight of copper , which is 10.3 grams according to the given question.
i- current = 2.32 ampere
t- time =?
E- equivalent weight of copper = atomic weight/ charge
⇒ 63.5/ 2 = 31.7 g.
F- Faradays constant= 96500C
∴10.3 = (31.7/96500) x 2.32 x t
⇒ t= 13517 sec
⇒t= 13517 / 60x60
∴t= 3.75 hours
Hence, In 3.75 hours a current of 2.32 amps be passed to produce 10.3 g of copper metal from a solution of aqueous copper(ii) chloride.
To learn more about Faraday's law refer-https://brainly.com/question/1640558
#SPJ4
Cold packs, whose temperatures are lowered when ammonium nitrate dissolves in water, are carried by athletic trainers when transporting ice is not possible. Which of the following is true of this reaction?Group of answer choicesΔH = 0, since cold packs are sealedΔH > 0, process is endothermicΔH > 0, process is exothermicΔH < 0, process is exothermicΔH < 0, process is endothermic
ΔH > 0, the process is endothermic; this is true about this reaction in which ammonium nitrate is dissolved in water
An endothermic reaction is a term used in chemistry to describe the chemical reactions in which the reactants absorb heat energy from the surrounding environment to produce the products
When cold packs are filled with water and ammonium nitrate, and the bag is squeezed then the water interacts with the chemical (ammonium nitrate) to initiate a reaction that decreases the temperature of the water to almost freezing. It can decrease inflammation and numb pain in the area because the icing is effective at reducing swelling and pain because the cold constricts blood vessels and decreases circulation to the area of inflammation.
To learn more about the endothermic reaction; click here:
https://brainly.com/question/3206251
#SPJ4
energy investment in the first stage of glycolysis requires glucose to be and cleaved to yield two molecules.
Energy investment in the first stage of glycolysis requires glucose to be phosphorylated and cleaved to yield two molecules.
Glycolysis is a metabolic pathway that converts glucose into two molecules of pyruvate in the presence of oxygen or two molecules of lactate in the absence of oxygen.
The metabolic pathway that converts glucose to pyruvate is known as glycolysis. This free energy is used to create the high-energy molecules adenosine triphosphate and reduced nicotinamide adenine dinucleotide. Glycolysis is a series of ten enzyme-catalyzed reactions. The process occurs in a cell's cytoplasm and does not require oxygen. It can be found in aerobic and anaerobic organisms. Phosphorylation traps glucose with the help of the enzyme hexokinase.
To learn more about glycolysis, here
https://brainly.com/question/14076989
#SPJ4
Describe what happens in a collision??
Answer:
The forces involved in a collision are equal in size and directed in the opposite direction, and they accelerate both objects. Each object accelerates equally in collisions with things of equal mass.
Explanation:
what is the concentration, in mass percent, of a solution made by mixing 45.0 g of nacl with 250.0 ml of water?
45 grams are equal to the mass of the solution multiplied by 100, or the mass of NaCl. We can sell them for 295.0 grams times 100 points and receive 15.25 percent of the sale price. The result is that the concentration of NaCl in the solution, which is 8 percent, is 15.25 percent.
What is the concentration of a solution made by combining 200 mL of water and 50 g of salt?You will have 25 g of solute in 100 g of solution since you have 50 g in 200 g of solution. According to the definition given above, this solution is 25% by mass.
How can you figure out a solution's concentration as a percentage?One of three methods can be used to calculate this percentage: either the volume of the solute divided by the volume of the solution, the mass of the solute divided by the volume of the solution, or any combination of this solution.
To know more about Concentration in mass percentage here:
brainly.com/question/13959665
#SPJ4
amp-pnp is a non-hydrolyzable analog of atp that can bind to proteins in a similar manner as atp but is no longer hydrolyzed. predict what would happen to helicase activity if amp-pnp were added to a dna replication reaction.
Helicase would cease to function if the AMP-PNP was not hydrolyzed. ATP binding and hydrolysis cause conformational changes that allow helicase to unwind DNA.
Helicases are nucleic acid or nucleic acid protein complex binding enzymes that can also remodel them. There are helicases for both DNA and RNA. DNA helicases are required during DNA replication because they split double-stranded DNA into single strands, allowing each strand to be copied independently.
Helicases are a type of enzyme that is thought to be essential to all organisms. Helicases are motor proteins that use ATP hydrolysis to move directionally along a nucleic acid phosphodiester backbone, separating two hybridized nucleic acid strands. DNA helicases catalyze the dissolution of the hydrogen bonds that connect the two strands of double-stranded DNA. This energy-demanding unwinding reaction produces single-stranded DNA, which is used as a template or reaction intermediate in DNA replication, repair, and recombination.
To learn more about helicase, here
https://brainly.com/question/13543444
#SPJ4
What is evaporation
Answer:
The process of turning from liquid into vapor.
Explanation:
a sample of a metal, heated in air, gains mass dm by oxidising at a rate that declines with time t in a parabolic way, meaning that dm2 ¼ kpt where kp is a constant. why does the rate fall off in this way? what does it imply about the nature and utility of the oxide?
Oxidation originates at the surface of the metal and then it slowly penetrates through the surface.
As at the beginning exposed surface area is more therefore rate of oxidation is also more. After that, the process needed to occur inside the exposed surface of the metal, and the rate of diffusion decreases, so the rate of oxidation decreases.
It represents oxide layers that reduce the diffusion rate, therefore it is used for producing isolation shields for metals. Apart from that for covering a metal from the external environment or masking oxide layers are produced on metal surfaces.
Mass is a quantitative measure of inertia, an essential property of all dependents. It's far, in effect, the resistance that a frame of count number gives to a change in its speed or position upon the application of pressure. The more the mass of a frame, the smaller the alternate produced with the aid of a carried-out force.
Learn more about Mass here:-brainly.com/question/28021242
#SPJ4
Characterize each mixture as a solution, colloid, suspension.
Whipped cream:
- Solution
- Colloid
- Suspension
Colloid
Whipped cream is characterized as per it's characteristic and properties are based on physical and chemical :- Colloid each mixture as a solution, colloid, suspension.
Creme or whipped cream Desserts and beverages frequently use chantilly as a garnish. The following desserts frequently use whipped cream as a spread or topping: Pies (particularly pumpkin pies and chocolate pies) (especially pumpkin pies and chocolate pies) an ice cream (especially ice cream sundaes) In a solid, liquid, or gaseous media, one or more components are distributed as relatively large solid particles or liquid droplets to form a mixture known as a colloid mixture. A colloid's particles are frequently electrically charged, remain scattered, and do not settle as a result of gravity.
Learn more about colloid here:
https://brainly.com/question/11640006
#SPJ4
supposed you have samples of three unknown solids. Explain how you could use their properties to determine whether or not they are ionic solids
The properties of the unknown solids which will help to determine whether or not they are ionic solids is them possessing a high melting and boiling points.
What are Ionic solids?
This is referred to as a chemical compound which comprises of ions and is usually held together by electrostatic forces called ionic bonding.
Ionic solids have to undergo melting which involves the application of heat in other to test the melting and boiling points as solid substances are unable to do that due to its tightly packed particles which is therefore the reason why it was chosen as the correct choice.
Read more about Ionic solids here https://brainly.com/question/2773282
#SPJ1
What mass of liquid ethanol (c2h5oh) must be burned to supply 500 kj of heat? the standard enthalpy of combustion of ethanol at 298 k is -1368 kj/mol.
500 kJ of heat are created by burning 16.84 grams of ethanol. The standard enthalpy of combustion for ethanol is -1368 kj/mol at 298 k.
Alcohol or fuel: which is ethanol?
A renewable fuel known as "biomass" is used to create ethanol from diverse plant components. Ethanol, often in the form of E10 (10% ethanol, 90% gasoline), is added to more than 98% of gasoline sold in the US in order to oxygenate the fuel and lower air pollution.
Where can you find ethanol?
Corn is the most widely used ingredient in ethanol produced domestically. It can also be produced utilizing cellulosic feedstocks such crop waste and wood, however this is less common. The Midwest region of the United States has a concentration of ethanol facilities since maize production is nearby.
Briefing:
Given the following data:
Standard enthalpy of combustion of ethanol = −1368 kJ/mol.
Temperature = 298 K
By stoichiometry:
1 mole of ethanol = 1368 kJ of heat
X mole of ethanol = 500 kJ
Cross-multiplying, we have:
X = 0.3655 moles
Now, we can determine the mass of ethanol required:
Mass = 16.84 grams
To know more about ethanol visit:
https://brainly.com/question/13264860
#SPJ4
when an atom loses or gains electrons, the electron configuration for the resulting ion will be different than that of the original atom. if ar were to lose 2 electrons what would be the full electron configuration of the ar2 ion? question 10 options: a) 1s22s22p63s23p6 b) 1s22s22p6 c) 3s23p4 d) 1s22s22p63s23p4 e) 1s22s22p4
1s22s22p63s23p4 What would the entire electron configuration of the ar2 ion be if ar lost 2 electrons?
Does argon gain or lose how many electrons?A noble gas element is argon. As a result of having a fully charged outer shell, argon is extremely stable. The outer shell of argon would be incomplete if it were to give or receive one electron. Argon is already stable, therefore it neither gains nor loses electrons.
What ion does argon produce?Argonium. A proton and an argon atom are combined to form the ion argonium (ArH+). The amount of molecular hydrogen H2 is between 0.0001 and 0.001 percent in diffuse atomic hydrogen gas in interstellar space, where it can be discovered.
Learn more about electron configuration here:
https://brainly.com/question/14283892
#SPJ4
A hot mug of coffee was brought into a 25◦c room, where it started to cool according to newton’s law of cooling. After 10 minutes, the coffee was 45◦c and after another 10 minutes it was 35◦c. What was the coffee’s initial temperature?.
Answer:
The initial temperature of the coffee was 75°C.
what changes can humans make that can reduce their impact on the amount of carbon dioxide in the atmosphere? select the two answers that are correct.
consider the following voltaic cell which of the following statements is false? the al electrode is the anode the al electrode will tose mass the pt electrode is the cathode the pt electrode will gain mass electrons flow from the al electrode to the pt
According to the provided voltaic cell equation, it is untrue that the al electrode serves as the anode.
An electrode is a conductor of electricity used to make electrical contact with a nonmetallic component of a circuit. Depending on the type of battery, electrodes can be made of a range of materials and are a vital component. A conductor used to make electrical contact with a circuit's nonmetallic components is called an electrode. Common applications for electrodes include electrochemical cells, semiconductors like diodes, and medical equipment.
The voltaic cell, which bears the names of scientists Luigi Galvani and Alessandro Volta, is an electrochemical device that produces an electric current through uninhibited oxidation-reduction reactions. A voltaic cell is an electrochemical device that harnesses the power of a chemical process to generate electricity. the essential elements of a solar cell.
learn more about voltaic cell here
https://brainly.com/question/22170690
#SPJ4
which solute would you expect to most lower the freezing point of water? which solute would you expect to most lower the freezing point of water? all solutes lower the freezing point equally cacl2 sugar nacl
[tex]CaCl_{2}[/tex] is the substance that one would anticipate lowering water's freezing point the most.
This makes use of the freezing point depression theory. When dealing with this problem, we employ the equation shown below:
T = iKfm, which is rendered as follows in English:
Vant Hoff factor times molal freezing point depression constant * Solution molality equals the change in freezing point.
The quantity of molecules, not their composition, determines the freezing point depression because it is a colligative feature.
Now that we are certain that Kf and molality will remain constant, the Van't Hoff factor, also known as "i" is our sole remaining unknown.
The number of atoms that separate from each particular molecule is known as the Van't Hoff factor. The freezing point will be more depressed the greater the Van't Hoff factor.
NaCl will dissociate into Na+ and Cl-, therefore it has I = 2 CaCl2 will dissociate into Ca2+ and 2 Cl-, so it has I = 3. Sugar (C12H22O11) has I = 1.
Choice B is the appropriate response as a result.
To learn more about freezing point, refer:-
https://brainly.com/question/13380426
#SPJ4
what volume of a 0.425 m naoh solution is needed to neutralize 80.0 ml of a 0.176 m solution of h2so4?
The volume of a 0.425M NaOH solution that is needed to neutralize 80.0 ml of a 0.176M solution of sulfuric acid is 33.13mL.
How to calculate volume?The volume of a substance can be calculated using the following expression:
CaVa = CbVb
Where;
Ca = initial concentrationCb = final concentrationVa = initial volumeVb = final volumeAccording to this question, 0.425M NaOH solution is needed to neutralize 80.0 ml of a 0.176M solution of sulfuric acid. The volume needed can be calculated as follows:
0.425 × Va = 80 × 0.176
0.425Va = 14.08
Va = 33.13mL
Therefore, 33.13mL is the volume of the solution.
Learn more about volume at: https://brainly.com/question/12346232
#SPJ1
Ruthenium (Ru) is commonly used in the manufacture of platinum alloys. What is the ground-state electron configuration for an atom of ruthenium?
It always takes specific quantity of energy to remove only 1 electron from an atom.
What is electron?Electron is a stable sub atomic particle with a charge of negetive electricity found in all atoms and acting as the primary Carrier of electricity in solid.
Sol-This is shown by the equation where this is the orbit of the electron around a proton is equal to the quantum. The quantities by energy level, times by wavelength. So this is this equation and then abruptly hypothesis in links quantities. Energy states with a standing wave function so as that the energy of the election on increases its orbit must also increase. And as it is considering the wavelength, we're assuming statnon is constant. It's not to the changing and two pies just by a constant.
As the energy or quantifies energy level of an electron increases the its radius around the nucleus must increase. Also, if its energy level of the decreases, its radius must also decrease. So this is the hypothesis ties together quantities, energy levels and the relationship and its relationship by it with the size of the circumference of around it. A nucleus which is also to the Electron.
To know more about electron click-
https://brainly.com/question/25674345
#SPJ1
is there something wrong with the nuclear model (like a miniature solar system) of the atom? if so, what is wrong? choose all that apply.
Orbiting electrons would emit light, The solar system model of the atom describes a situation in which the atom would collapse, Orbiting electrons would accelerate.
The elementary electric charge of the electron (eor -), a subatomic particle, is a negative one. Due to the fact that they are assumed to be elementary particles and lack any known components or substructure, electrons, which are a member of the first generation of the lepton particle family, are classified as such. The mass of an electron is around one-eighth that of a proton. An intrinsic half-integer value angular momentum (spin) with units of the decreased Planck constant,, is one of the electron's quantum mechanical properties. The characteristics of both waves and elementary particles are shared by electrons. They are susceptible to particle collisions and to light-like diffractive effects. It is simpler to understand the wave characteristics of electrons.
Learn more about electrons here:
https://brainly.com/question/18367541
#SPJ4
when the reaction mno2(s) ⇌ mn2 (aq) mno4-(aq) is balanced in an acidic solution, what is the coefficient of h
In the balanced chemical reaction of MnO₂, the coefficient of H⁺ is 4.
Balanced chemical reaction
The chemical equations which have the same number and same type of each atom on both sides of the equation is known as balanced chemical equation. The coefficients in a balanced equation must be always the simplest whole number ratio. Mass is always conserved in chemical reactions i.e., neither destroyed nor created.
Balanced chemical reaction of MnO₂ is given as:
5MnO₂ + 4H⁺ → 3Mn₂ + 4H₂O + 2MnO₄⁻
Hence, the coefficient of H⁺ in the balanced chemical equation of reduction MnO₂ is 4.
Learn more about balanced chemical reactions from the link given below.
https://brainly.com/question/14152531
#SPJ4
when a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup lost the same as that of pure water. c = 4. 18 0/k -'63- solution process nhano3(s) - nh4*(aq) + no3 (aq) assume that the specific heat of the solution is.
Then, the dissolution process is endothermic. The solution has a positive 25.8 Kilojoules per mole specific heat. That will be equivalent to the solution's specific heat as its temperature drops.
Here's the complete question .(a) When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter ( the temperature drops from 23.0 C to 16.6 C . Calculate H (in kJ/mol NH4NO3) for the solution process shown below. Assume that the specific heat of the solution is the same as that of pure water. Hint: this process occurs at constant pressure. NH4NO3(s) --> NH4+(aq) + NO3-(aq) H = kJ/mol?
Answer and Explanation:
Given data:Mass of the ammonium nitrate
(NH4NO3) = 4.25 g
Mass of the water (H2O) = 60.0 g
Total mass of the mixture ( reactants) = Mass of the ammonium nitrate + Mass of the water
Total mass of the mixture ( reactants) = 4.25 g + 60.0 g = 64.25 g
Specific Heat (c) = 4.184 Jg/K
Drop in temperature (ΔT) = 23.0oC−16.6oC=6.4oC
1 Heat energy for the mixture
Q = m×c×ΔT
Here,
Q = Heat energy
m = mass of the mixture = 64.25 g
c = Specific Heat = 4.184 Jg/K
ΔT = 6.4oC
Q = 64.25g×4.184Jg/K×6.4oC
Q = 1720.4608 J
Q = 1.720 k J
2ΔH for the ammonium nitrate
ΔH = Q / Number of moles of the ammonium nitrate
Number of moles of the ammonium nitrate (n) = mass of ammonium nitrate / molar mass of ammonium nitrate
Mass of the ammonium nitrate = 4.25 g
Molar mass of the ammonium nitrate = 80g/mol
Number of moles of the ammonium nitrate (n) = 4.25/80
Number of moles of the ammonium nitrate (n) = 0.053125 moles
ΔH = Q/Number of moles of the ammonium nitrate
ΔH = 1.720kJ/0.053125mol
ΔH = 32.376 kJ/mol.
In water, is NH4NO3 endothermic or exothermic?the endothermic response,Because the reaction is endothermic, meaning it takes energy from the environment in the form of heat, the beaker turns cold when ammonium nitrate is dissolved in water. As a result, the endothermic reaction of hydrating NH4NO3 causes the beaker to become cold.
How can you say if something is endothermic or exothermic?Heat is released during an exothermic reaction, raising the temperature of the immediate environment. The surrounding is cooled through an endothermic process that absorbs heat.
Learn more about specific heat here:
https://brainly.com/question/11297584
#SPJ4
We measure the concentration of H+ ions to be 1.00 * 10-5 M. What is the pH of this solution?
Answer:hydrogen ion concentration.
Explanation:
in order to protect underground pipelines and storage tanks made of iron, the iron is made the cathode of a voltaic cell through a process called .
In order to protect underground pipelines and storage tanks made of iron, the iron is made the cathode of a voltaic cell through a process called Impressed current method which is a kind of cathodic protection.
There are two methods which belongs to cathodic protection
a) one is by connecting the base metal with a more reactive metal and making the more reactive metal anode which sacrifices itself protecting the base metal [Iron in this case] : This is known as Sacrificial anodization protection
b) the second method is : Impressed current method where the base metal is connected to a battery in such a way that it starts behaving as cathode. This method is used in the given problem
learn more about cathode here:
https://brainly.com/question/4052514
#SPJ4