Find the ClO− concentration of a mixture that is 0.300 M in HF and 0.150 M in HClO.
Answers
Since H+ and ClO- ions are produced in a 1:1 ratio by the dissociation of HClO, the concentration of ClO- in the mixture is also 4.5 x 10⁻⁹ M.
To find the ClO- concentration in the mixture, we first need to write the balanced chemical equation for the dissociation of HClO:
HClO(aq) ⇌ H+(aq) + ClO-(aq)
The acid dissociation constant (Ka) for HClO is 3.0 x 10^-8. We can use the expression for Ka to calculate the concentration of H+ ions produced by the dissociation of HClO:
Ka = [H+][ClO-] / [HClO]
[H+] = Ka x [HClO] / [ClO-]
We can assume that the dissociation of HF is negligible compared to that of HClO, so the H+ concentration in the mixture is essentially equal to the H+ concentration produced by the dissociation of HClO.
Therefore:
[H+] = Ka x [HClO] / [ClO-]
= (3.0 x 10⁻⁹) x (0.150 M) / 1
= 4.5 x 10⁻⁹ M
Since H+ and ClO- ions are produced in a 1:1 ratio by the dissociation of HClO, the concentration of ClO- in the mixture is also 4.5 x 10⁻⁹ M.
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Related Questions
What causes heartburn? How do antacids work to relieve heartburn? What are the key
ingredients in various antacids? Are some more effective than others, and if so what might
make some more effective than others? Compare different brands of common antacids in
terms of their ingredients and other factors. Can you think of a way to demonstrate how
antacids work?
Answers
Answer:
Antacids use a combination of calcium, magnesium, and aluminum salts as their active ingredients. These medications work by neutralizing the acid in the stomach. They also inhibit pepsin , which is an enzyme that plays a role in protein digestion.Hope this answer helps
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A liquid typically boils at 200 degrees C. If an insoluble salt is added to the liquid, its new boiling point will be:
a) greater than 200 degrees C
b) less than 200 degrees C
c) 200 degrees C
d) not enough information is provided to answer the question
Answers
Answer:
Explanation:
the addition of the soluable salt will cause the boiling point to be higher
a) greater than 200 degrees C. if an insoluble salt is added to a liquid that typically boils at 200 degrees C, its new boiling point will be greater than 200 degrees C.
When an insoluble salt is added to a liquid, it causes a change in the vapor pressure of the liquid, which in turn affects the boiling point of the liquid. The addition of an insoluble salt to a liquid raises its boiling point.
This is because the presence of the solute in the liquid reduces the vapor pressure of the liquid, making it more difficult for the liquid to boil. The boiling point of the liquid increases until the vapor pressure of the liquid once again matches the external pressure, at which point the liquid will boil.
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CL1
Gold, one of the most sought-after metals in the world, has a
density of 19. 3 g/cm', a melting point of 1064 °C, and a spe-
cific heat of 0. 129 J/g °C. A gold nugget found in Alaska in
1998 weighed 20. 17 lb. (2. 4. 2. 6, 2. 7. 3. 3. 3. 5)
Gold nuggets, also called
native gold, can be found in
streams and mines.
a. How many significant figures are in the measurement of
the weight of the nugget?
b. Which is the mass of the nugget in kilograms?
c. If the nugget were pure gold, what would its volume be in
cubic centimeters?
d. What is the melting point of gold in degrees Fahrenheit
and kelvins?
e. How many kilocalories are required to raise the tempera-
ture of the nugget from 500. °C to 1064 °C?
f. If the price of gold is $42. 06 per gram, what is the nugget
worth in dollars?
Answers
There are 4 significant figures in the measurement of the weight of the nugget,mass of the nugget in kilograms is 9.15 kg,volume is 474.09 cm³,melting point of gold in degrees Fahrenheit and kelvins is 1064°C and 1948°F.
What are significant figures?Significant figures are used for establishment of a number which is presented in the form of digits. These digits give a meaningful representation to the numbers.
The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.
Volume is found out as, mass/density which 9150/19.3=474.09 cubic centimeters.
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Match the terms below to the correct definitions
3. Atom
1. The mass on the periodic table.
b. Electrons
2. Region surrounding the nucleus where electrons are found.
C. Protons
3. Positively charged center of an atom.
d. Neutrons
4. Particles that differ in number between isotopes.
e. Electron
cloud
5. Vertical column in the periodic table.
1. Nucleus
6. Positively charged particles in an atom.
R. Quark
7. Negatively charged particles in the outermost energy levels of the electron cloud.
8. Table that organizes the elements by properties.
9. Atoms of the same element that have different masses.
h. Atomic
number
1. Mass number
10. Smallest known particle that makes up protons and neutrons.
j. Average
atomic mass
11. All elements in the same one of these has the same number of energy levels in
their electron cloud.
k. Isotopes
12. The smallest form of matter that still retains the properties of an element.
1. Valence
electrons
13. Negatively charged particles in an atom.
m. Group
14. The sum of protons and neutrons in an atom.
n. Period
15. Represents the identity of an element.
o. Periodic
Table
Answers
Answer:
Explanation:
1=i
4=d
5=m
6=c
8=o
9=j
10=a
13=b
14=h
15=l
Theses are the ones i knew
A patient administered 20 mg of iodine-131. How many mg of this radioactive isotope will remain the body after 24 days? NEEDS ANSWER ASAP
Answers
Answer:
Radioactivity becoming concentrated in patients thyroid gland
Explanation:
To solve this we must be knowing each and every concept related to half life and its calculations. Therefore, 0.625mg of this radioactive isotope will remain the body after 24 days.
What is half life?Half life tells about the time at which the radioactive material decays to half of its initial concentration. Kinetics of radioactive decay is of first order kinetics.
Mathematically, the formula for amount of substance at time t
N(t) =No ×1/2)\(^{t/h}\)
N(t) = quantity of the substance remaining
No = initial quantity of the substance
t = time elapsed
h = half life of the substance
substituting all the given values in the above equation, we get
N(t) =20 ×1/2)\(^{40/8}\)
On calculations, we get
N(t) =0.625mg
Therefore, 0.625mg of this radioactive isotope will remain the body after 24 days.
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how to read a specific line from a text file in c++
Answers
We then create a string variable called "line" to store the data of each line in the file.Next, we use a while loop to read each line in the file. Inside the loop, we check if the current line number matches the line number that we want to read. If it does, we print the contents of that line using the cout statement and exit the loop. If not, we increment the line number and continue reading the file. Once we have read the specific line that we want, we close the file using the close() function.
To read a specific line from a text file in C++, you can follow these steps:
Step 1: Open the text file in input mode using the if stream function and the file name as an argument.
Step 2: Create a string variable to store the data of each line in the file.
Step 3: Use a loop to read each line in the file, and store it in the string variable created in Step 2. Keep track of the line number using a counter variable.
Step 4: When the counter variable matches the line number that you want to read, exit the loop.
Step 5: Close the file using the close() function.
The following code snippet demonstrates how to read a specific line from a text file in C++:
```#include
#include using namespace std;
int main()
{ if
stream file("example.txt");
string line;
int lineNumber = 1;
int lineToRead = 5;
// read the file line by line while (getline(file, line))
{ // check if this is the line we want
if (lineNumber == lineToRead
) { cout << line << endl; // exit the loop break; } // increment the line number line
Number++; }
file.close();
return 0; }```
In the above code, we first open the "example.txt" file in input mode using the if stream function. We then create a string variable called "line" to store the data of each line in the file.Next, we use a while loop to read each line in the file. Inside the loop, we check if the current line number matches the line number that we want to read. If it does, we print the contents of that line using the cout statement and exit the loop. If not, we increment the line number and continue reading the file.Once we have read the specific line that we want, we close the file using the close() function.
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When heat is added to atoms, the molecules vibrate much more slowly.
Answers
Answer:
false
Explanation:
when heat is added to atoms, the molecules vibrate more quickly, because it increases the heat energy, which in turn, increases the particle movement
Answer: When heat is added to the neon atoms, they begin to move around, separate from each other, and turn into gas. As more heat is added, the atoms begin to move more quickly inside the container.
Explanation: Correct answer
What kind of reaction is symbolized by AB + C → CB + A?
A. Single replacement
a
B. Double replacement
C. Decomposition
D. Synthesis
SUBMIT
Answers
Since a single replacement reaction involves the change of an atom by another, the reaction is a single replacement reaction.
What is a reaction?The term chemical reaction is another word for chemical change. It involves an interaction between two or more chemical species leading to the formation of a new chemical species.
The reaction AB + C → CB + A is a single replacement reaction because The A in the reactant side is replaced by C while it becomes displaced.
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Answer:
single displacement
Explanation:
trust
Which of the following reagents can be used to distinguish between sodium sulphite and sodium sulphate?
(1) iron(II) chloride solution
(2) acidified potassium permanganate solution
(3) concentrated nitric acid
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
please please help this confused me for so long
Answers
5. For the reaction 2Na+ Cl₂ → 2NaCl, how many moles of NaCl can be produced from
47.8 L of Cl₂?
Answers
4.26 moles of NaCl can be produced from 47.8 L of Cl₂.
In order to determine the number of moles of NaCl that can be produced from 47.8 L of Cl₂, we can use the stoichiometry of the given balanced chemical equation, 2Na + Cl₂ → 2NaCl.
First, convert the volume of Cl₂ to moles using the ideal gas law equation (PV = nRT).
where,
P = pressure
V = volume
n = number of moles
R = the gas constant
T = temperature.
Assuming standard conditions (pressure of 1 atm and temperature of 273.15 K), you can calculate the moles of Cl₂ as follows:
n = PV / RT
n = (1 atm * 47.8 L) / (0.0821 L*atm/mol*K * 273.15 K)
n ≈ 2.13 moles of Cl₂
Now, use the stoichiometry of the balanced equation to find the moles of NaCl produced. The mole ratio between Cl₂ and NaCl is 1:2 (1 mole of Cl₂ produces 2 moles of NaCl).
So, you can calculate the moles of NaCl as follows:
moles of NaCl = 2.13 moles of Cl₂ * (2 moles of NaCl / 1 mole of Cl₂)
moles of NaCl ≈ 4.26 moles
Therefore, approximately 4.26 moles of NaCl can be produced from 47.8 L of Cl₂.
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Which property describes a mixture? select three options. it can be separated by physical methods. it has a single chemical composition. it can appear different from different sources. it cannot be described by a chemical symbol or formula. it cannot have more than one state of matter.
Answers
The property of mixture which describes a mixture are it can be separated by physical methods, it can appear different from different sources and it cannot be described by a chemical symbol or formula.
What are mixtures?Mixtures are the compounds which are formed by the addition or combination of one or two elements or compounds.
As in the mixtures many states of matters are present and it will be filtered by using various physical methods, and it is not chemically shown by single chemical symbol or formula. Mixtures are also of two types:
Homogeneous mixtures are those in which equal compositions all over the volume is present.Heterogeneous mixtures are those in which different composition all over the volume is present.Hence options (1), (3) and (4) are correct.
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How does protein substance in an animal hide or skin be prevented from bacterial infection during the process of tanning? * a.By soaking in water b.By deliming using an acid c.By brine curing d.By scudding with dull knife
Answers
Answer:
c. By brine curing
Explanation:
Tanning refers to the process of treating the hides and skins of animals to produce leather.The different processes involved in the tanning of leather include:
Curing: this is the process of applying salt to the animal hide to prevent decay from bacterial growth. It also serves to reduce the moisture content of the animal hide.
Soaking : this involves soaking the hides in clean water to remove the salt left over from curing and increase the moisture content for further treatment of the hide.
Liming: Liming is done by applying lime to remove hair, fat and grease and in order for the hide to swell up.
Scudding: This is the process of further removal of usually done first by a machine, and then manually using a dull knife.
Deliming: This is done using an acid to reduce the pH of the collagen found in the hide being tanned.
13.Jewelry is a potential safety issue because:a) chemicals can be trapped under it, in contact with sensitive skinb) it could be stolenc) it can be damaged by chemical fumes and spillsBackground image
Answers
Jewelry is a potential safety issue because chemicals can be trapped under it, in contact with sensitive skin (option A).
What is jewelry?Jewelry is collectively a personal ornamentation such as rings, necklaces, brooches and bracelets, made of precious metals and sometimes set with gemstones.
Jewellery is made of metals, sometimes heavy metals. Hence, the accumulation can be serious threat to the environment when used.
Chemicals can be trapped under jewelry such as rings, necklace, etc. This, when in contact with the skin, can cause serious damage to the body.
Therefore, option A is the correct choice.
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Which of these is the dominant mechanism for the removal of carbon dioxide from the atmosphere?A) subductionB) photosynthesis in plantsC) dissolving carbon dioxide in seawaterD) formation of carbonate-rich rocks at the seafloor
Answers
The dominant mechanism for the removal of carbon dioxide from the atmosphere is the process of photosynthesis in plants. During this process, carbon dioxide is absorbed by plants and converted into organic matter, which is then used for plant growth and development. This mechanism is important because it not only removes carbon dioxide from the atmosphere but also produces oxygen, which is essential for the survival of many living organisms.
Although photosynthesis is the primary mechanism for the removal of carbon dioxide from the atmosphere, other processes also play a role. One such process is the dissolution of carbon dioxide in seawater, which can result in the formation of carbonate ions. These carbonate ions can then react with calcium ions in seawater to form calcium carbonate, which can eventually settle on the seafloor and form carbonate-rich rocks.
Subduction, on the other hand, is a process by which one tectonic plate is forced beneath another. This process does not directly remove carbon dioxide from the atmosphere, but it can contribute to the removal of carbon dioxide over long periods of time. When tectonic plates are forced beneath one another, they can carry carbon-rich sediments with them, which can then be subjected to high temperatures and pressures, causing them to release carbon dioxide into the atmosphere.
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Neutral atoms & charged atoms has
equal number of electrons
Answers
Answer:
wrong.
Explanation: charged atoms have have more electrons than neural because they charge it . a neural atom has eaqual number of electrons and neutrons.
hope this helps(^人^)
1. . What is the percent composition of Carbon, in, C7H16?
a. 12%
b. 19%
c.68%
d. 84%
Answers
d. 84% is the percent composition of Carbon, in, C₇H₁₆
What does "percent composition" mean?% composition is quite straightforward. You can determine by mass how much of each element is contained in a compound using its percent composition. A chemical compound is created when two or more components are combined.
The hydrocarbon includes 80% carbon, which translates to 80% of the molar mass being made up of carbon. Consequently, the hydrocarbon has four carbon atoms.
The percent composition is calculated by multiplying the total mass or quantity of an element present in a molecule or compound by the molecular mass of the compound.
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Which option is an example of a physical property?
A toxicity
B rusting ability
C melting point
D flammability
Answers
Answer:
C . Melting point
Explanation:
Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density
which of the following equal volume solutions has the lowest conductivity? a. 0.1 m cuso4 b. 0.1 m koh c. 0.1 m bacl2 d. 0.1 m hf
Answers
In the following equal volume solutions, 0.1 m koh has the lowest conductivity because it has the lowest equivalent conductance value. The normalcy of sol is inversely correlated to equivalent conductance.
The analogous conductance is inversely proportional to solution molarity since normality and molarity are directly correlated (N=nfactorM). A gramme equivalent of an electrolyte in a given solution is defined as having an equivalent conductance, which is the conductance of all the ions produced by that gramme. Equivalent conductance is kV divided by. V is the volume in mL that contains 1 g's worth of the electrolyte. Solutions come in many forms, such as sugar and salt solutions, soda water, etc. In a solution, each element appears as a separate phase.
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in a galvanic cell, once electrons are produced at anode, they will move through the salt bridge towards the cathode half-cell. group of answer choices true false
Answers
True in a galvanic cell, once electrons are produced at anode, they will move through the salt bridge towards the cathode half-cell.
In a galvanic cell, oxidation occurs at the anode, producing electrons. These electrons then move through the external circuit towards the cathode, where reduction occurs. However, since the two half-cells are physically separated by an electrolyte solution, a salt bridge is used to allow the flow of ions between the two compartments. This is necessary to maintain charge neutrality and prevent the buildup of excess charge in either half-cell. The movement of electrons through the external circuit and the movement of ions through the salt bridge are two separate processes that are necessary for the overall functioning of the galvanic cell.
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What percentage of an original polonium sample will remain after 3 half-lives have passed?
Answers
After three half-lives, 12.5% of the original sample of polonium remains.
What is polonium element?Polonium is a very infrequent natural element. It is found in uranium ores but it is careless to extract it. It is obtained by bombarding bismuth-209 with neutrons to give bismuth-210, which then purifies to form polonium. All the industrially produced polonium in the world is made in Russia.Po-210 is an effect of the radioactive decay of uranium-238, which decays to radon-222 and then to polonium. Polonium 210 has a half-life of 138 days. Let the opening value of polonium-218 be 100. First half-life. Therefore, 6.25 % of the original sample remains after 4 half-lives that are 12 minutes. Element Polonium has atomic Number 84, p-block, Mass number is 209.
So we can conclude that polonium is a radioactive, silvery-gray, or black metallic element of the oxygen group in the periodic table.
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which example has particles that can be drawn closer to occupy smaller volume
Answers
One example of particles that can be drawn closer to occupy a smaller volume is a gas.
Understanding Gaseous StateIn the gaseous state, particles have high kinetic energy and are not strongly attracted to each other. They move freely and randomly, colliding with each other and the container walls.
Since there are minimal intermolecular forces holding them together, gas particles can be compressed or drawn closer together by reducing the volume of the container.
By decreasing the volume of a gas, such as by compressing it in a cylinder or container, the particles have less space to move around. They collide with each other more frequently, increasing the frequency of intermolecular collisions. As a result, the gas particles are drawn closer together, and the overall volume occupied by the gas decreases.
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calculate the volume in milliliters of a m sodium chloride solution that contains of sodium chloride . round your answer to significant digits.
Answers
The NaCl solution has a 1.7 L volume.
Molarity (M) is calculated by dividing the volume of the solution (V) in liters by the number of moles of solute (n). Not moles of solute per liter of solvent, but rather moles of solute per liter of solution, is a crucial distinction to make when defining molarity.
The volume of the NaCl solution is 1.7 L.
First step: Information is given
The molarity of sodium chloride is 1.8 M.
The mass of sodium chloride is 175 grams.
The molecular weight of sodium chloride is 58.44 g/mol.
Step 2: Calculate the moles of sodium chloride.
Mass NaCl divided by molar mass NaCl equals moles of NaCl.
58.44 grams/mole of sodium chloride, or 175.0 grams
2.995 moles are equal to one NaCl mole.
3. Calculate the volume of the solution.
Ratio of volume to mole
Volume equals Molarity times Molar NaCl.
Volume = 1.9 M / 2.995 M
= 1.66 to 2.7 liters in volume.
The NaCl solution has a 1.7 L volume.
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Complete Question -
Calculate the volume in liters of a 1.8M sodium chloride solution that contains 175. g of sodium chloride (NaCI). Round your answer to 2 significant digits.
Explain why chemical reactions are used to form synthetic materials.
Answers
The rearrangement of the atoms is the reason why.
The synthetic materials form as a product due to chemical reactions with bonds breaking in the process; As the bonds break, the rearrange into these materials.
You're welcome :)
fill in the blank. "Hydration is a specific example of the phenomenon known generally as __________.
a. solvation
b. disordering
c. dilution
d. salutation
e. condensation"
a. solvation
Answers
Hydration is a specific example of the phenomenon known generally as a. solvation
The act of hydrating involves combining or dissolving an object in water. It is a particular instance of the more general phenomena known as solvation, which is the process by which solvent molecules surround and scatter a solute to create a homogeneous solution. However, hydration explicitly refers to solvation with water as the solvent.
Solvation may also happen with solvents other than water. Solvation is the process through which a solute and solvent interact to stabilise a solute species. Due to its impact on the solubility, reactivity, and behaviour of compounds in solution, solvation is a crucial mechanism in many chemical and biological processes.
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Hypothesis: If a material undergoes a
chemical change, then it will not retain its
original properties because a new substance
is formed.
To test the hypothesis above, you will observe the
changes during the experiment.
To do this, you will use these observations to
compare the___
of the
substances
to the__
substances.
of the
Answers
Answer:
I hate to not answer and have you repost this if you could repost it with the choices by clicking the arrow I can figure it out a lot faster and I'll copy and paste to show you that it's right
Explanation:
I'm good with history biology sum math so if you want to do what I asked and reposted I can give you the answers and I will show that they are correct I won't just guess like some people do just to get points cuz I don't care about points I just get on here to help people
Answer: The answer for the blanks is initial appearance and than final appearance.
Explanation:
Arrange the following atoms in order of decreasing atomic radius: Ga,As,Sn,Sb,Te
Answers
Answer:
Sn, Sb, Te, Ga, As
Explanation:
How do plants acquire the nutrients nitrogen and phosphorus?
Answers
Plants acquire nitrogen and phosphorus, which are essential nutrients for their growth and survival, from the soil. Nitrogen is typically taken up by plants in the form of nitrates (NO3-) or ammonium (NH4+) ions, which are absorbed through the roots.
Phosphorus is absorbed by plants in the form of phosphates (PO4^3-).
The process of acquiring nitrogen and phosphorus from the soil involves the following steps.
Absorption: The roots of the plant take up nitrates and phosphates from the soil solution through specialized structures called root hairs.Transport: Once absorbed, the ions are transported through the plant's vasculature to the leaves and other parts of the plant where they are needed.Assimilation: The ions are then incorporated into various compounds, such as amino acids, nucleotides, and phospholipids, which are used to build the structural and metabolic components of the plant.The availability of nitrogen and phosphorus in the soil can be limited, and their absence can restrict the growth and productivity of plants. To ensure adequate supply of these nutrients, farmers often use fertilizers to supplement the soil with extra nitrogen and phosphorus.
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if 2.0 ml of 0.10 m nh3 is titrated with 25 ml of 0.10 m hcl , what will be the ph of the resulting solution? round your answer to two decimal places.
Answers
To calculate the pH of the resulting solution after titrating 2.0 ml of 0.10 M NH3 with 25 ml of 0.10 M HCl, a detailed calculation is needed.
Given the volumes and concentrations of NH3 and HCl, we can determine the number of moles for each compound. The balanced chemical equation for the reaction between NH3 and HCl is NH3 + HCl → NH4Cl. By using the formula C * V = n (where C is concentration, V is volume, and n is moles), we find that NH3 has 0.0002 moles and HCl has 0.0025 moles. Since the reaction is 1:1, all NH3 is consumed, resulting in 0.0002 moles of NH4Cl. Considering the concentration of NH4Cl and its hydrolysis, the pH of the resulting solution is 9.25.
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Rank the following species in order of decreasing boiling point (highest to lowest): O3, N2, H2,CO2, O2
Answers
The following species can be listed in order of decreasing boiling point:
CO₂>O₃>N₂>O₂>H₂
The boiling point of gases depends upon the strength of the intermolecular forces of attraction acting between them and the molecular weight of the gaseous species.
CO₂ has polar bonds and also exhibits dipole - dipole interactions.
O₃ also has polar covalent bonds
O₂, N₂ and H₂ are non polar but have london dispersion forces as weak intermolecular forces.
Thus, the order of decreasing boiling point will be -
CO₂>O₃>N₂>O₂>H₂
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If you had a 4.0M and a 0.4M solution of nitric acid, which would have a lower pH? Why?
Answers
Answer:
the second one would have lower
Explanation:
because of the amount
pH is the measure of the negative log of the hydrogen ion concentration. The 0.4 M nitric acid will have lower pH.
What is pH?pH is the concentration of the hydronium or the hydrogen ion in the water that gives the account to the basic and acidic nature of the substance.
pH is dependent on the concentration of the substance as the increased concentration increases the pH while the lower concentration lowers the pH.
Therefore, 0.4 M will have a lower concentration.
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