oxygen gas can be prepared by heating potassium chlorate according to the following equation: the product gas, , is collected over water at a temperature of 20 °c and a pressure of 757.0 mm hg. if the wet gas formed occupies a volume of 7.96 l, the number of moles of reacted was mol. the vapor pressure of water is 17.5 mm hg at 20 °c.
Answers
The number of moles of oxygen gas produced when potassium chlorate is heated is approximately 0.3807 mol.
To determine the number of moles of oxygen gas produced when potassium chlorate is heated, we need to consider the ideal gas law and the partial pressure of oxygen gas.
The balanced equation for the reaction is;
2 KClO₃(s) → 2 KCl(s) + 3O₂(g)
Given that the wet gas, including oxygen, is collected over water, we need to account for the partial pressure of water vapor. The total pressure is the sum of the partial pressures of oxygen gas and water vapor.
Given;
Temperature (T) = 20 °C = 20 + 273.15 = 293.15 K
Total pressure (Ptotal) = 757.0 mm Hg
Volume (V) = 7.96 L
Vapor pressure of water (Pwater) = 17.5 mm Hg
First, we need to calculate the partial pressure of oxygen gas (Poxygen):
Poxygen = Ptotal - Pwater
= 757.0 mm Hg - 17.5 mm Hg
= 739.5 mm Hg
Now, we can use the ideal gas law equation to find the number of moles of oxygen gas (n):
PV = nRT
n = PV / RT
where;
P is the partial pressure of oxygen gas (in atm)
V is the volume of the gas (in L)
R is the ideal gas constant (0.0821 L·atm/mol·K)
T is the temperature (in K)
Converting the pressure to atm:
Poxygen = 739.5 mm Hg / 760 mm Hg/atm
≈ 0.9724 atm
Now, let's calculate the number of moles of oxygen gas:
n = (0.9724 atm) × (7.96 L) / (0.0821 L·atm/mol·K) × (293.15 K)
Simplifying the calculation:
n ≈ 0.3807 mol
Therefore, the number of moles of oxygen gas produced when potassium chlorate is heated is approximately 0.3807 mol.
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Related Questions
in the single-displacement reaction, what happened to the temperature and pressure immediately after adding the zinc to the hydrochloric acid solution?
Answers
In the single-displacement reaction between zinc and hydrochloric acid solution, the temperature typically increases, and the pressure may also increase.
When zinc (Zn) is added to a hydrochloric acid (HCl) solution, a chemical reaction takes place. The zinc reacts with the hydrochloric acid to form zinc chloride (ZnCl2) and hydrogen gas (H2). This reaction is exothermic, meaning it releases heat energy.
The release of heat energy during the reaction causes an increase in temperature in the immediate vicinity of the reaction mixture. The temperature rise can be observed by measuring the temperature of the solution or feeling the container if it is not insulated.
As the reaction proceeds, hydrogen gas is produced. If the reaction takes place in a closed container, such as a sealed flask or test tube, the production of gas can lead to an increase in pressure within the container. The pressure increase is a result of the accumulation of gas molecules in a confined space.
It is important to note that the magnitude of the temperature and pressure changes depends on the specific conditions of the reaction, such as the concentration of the acid and the amount of zinc used. The reaction rate and extent of temperature and pressure changes can be influenced by various factors, including the reaction vessel size, presence of catalysts, and reaction stoichiometry.
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What is the pressure of 1.27L of a gas at 288c if the gas had a volume of 875ml at 145 lap and 176c
Answers
Answer:
The pressure of 1.27L of a gas at 288C if the gas had a volume of 875mL at 145 kPa and 176C is 119.8 kPa.
What is the answer:
C4H8+H2=
Answers
A substance has a specific heat of 0.870 j/g°c. it requires 2,000.0 joules to increase the temperature of 10.0 grams of the substance from its original temperature to its final temperature. by how many degrees did the substance increase? a. 87.0°c b. 174°c c. 230°c d. 1,740°c
Answers
Explanation:
2000 J = .870 J/(g C) * 10 g * d where d is the degree change
2000/ (.870 *10) = d = ~230 C
________________ bonds form between amino acids to make a polypeptide, and then the amino acid side chains of the polypeptide attract and repel each other bending the protein into a _______________ shape.
Answers
Peptide bonds form between amino acids to make a polypeptide, and then the amino acid side chains of the polypeptide attract and repel each other bending the protein into a coiled shape.
Amino acids are organic compounds that contain both amino and carboxylic acid purposeful agencies. Even though hundreds of amino acids exist in nature, by a ways the maximum critical are the alpha-amino acids, which contain proteins. Handiest 22 alpha amino acids seem in the genetic code.
Amino acids are required for the synthesis of frame protein and different vital nitrogen-containing compounds, such as creatine, peptide hormones, and a few neurotransmitters.
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I will brainless who can answer this all pleaseeeeej
Answers
2. True
3. True
4. False
5. False
6. True
7. True
8. False
9. True
10. True
When solid ice at 0 Celsius melts and becomes liquid water, there is no change in temperature while melting.
A. true
B. false
Answers
Answer:
True
Explanation:
It's true. All the energy that is absorbed is used to break the bonds from the solid ice to liquid water. The temperature remains at 0 while this process is going on.
The air in the balloon i heated up by leaving it in a warm place. Give two effect that thi ha on the air particle
Answers
If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.
What is pressure?
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.
If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.
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The volume of a quartz mineral sample was determined placing the weighed sample in a graduated cylinder containing 56.3 mL water. With the mineral sample completely submerged, the water level was 68.2 mL. THis measuring method, known as water displacement, uses the volume of an irregular object. The dry mass of the quartz sample was 31.18 g. What was the density of the quartz in g/cm^3?
Answers
which one goes where?
Answers
Answer:
precipitation goes to the left box
condensation goes to the bottom box
evaporation goes in the top right box
Explanation:
hope this is helpfull
can you relate to these pictures
Determine the partial pressure and number of moles of each gas in a 16.75L vessel at 30 degree C containing a mixture of xenon and neon gases only. The total pressure in the vessel is 7.10 atm, and the mole fraction of xenon is 0.721.
What is the partial pressure of xenon?
What is the partial pressure of neon?
What is the number of moles of xenon?
What is the number of moles of neon?
Answers
First, we will calculate the number of moles of mixture of Xenon and Neon gases.Number of moles of mixture of Xenon and Neon gases:
Let x be the mole fraction of Neon.
Therefore, (1 - x) is the mole fraction of Xenon
.Mole fraction of Neon + Mole fraction of Xenon = 1x + (1 - x) = 1x = 1 - (1 -
x = 0 + x
x = 0.279
Mole fraction of Neon = 0.279
Mole fraction of Xenon = 0.721
Number of moles of gas = (Total Pressure * Volume)/(Gas Constant * Temperature)
Number of moles of Xenon = (7.10 atm * 16.75L * 0.721)/(0.08206 * (273 + 30))
Number of moles of Xenon = 8.44 moles
Number of moles of Neon = (7.10 atm * 16.75L * 0.279)/(0.08206 * (273 + 30))
Number of moles of Neon = 3.29 moles
Now, we can calculate the partial pressure of Xenon and Neon.
Partial pressure of Xenon:
Partial Pressure of Xenon = Mole fraction of Xenon * Total Pressure
Partial Pressure of Xenon = 0.721 * 7.10 atm
Partial Pressure of Xenon = 5.12 atm
Partial pressure of Neon
Partial Pressure of Neon = Mole fraction of Neon * Total Pressure
Partial Pressure of Neon = 0.279 * 7.10 atm
Partial Pressure of Neon = 1.98 atm
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why do you think printing a document on basic paper will help to ensure that it will last for a very long time
Answers
Answer:
So there is a physical version of it.
what is the purpose of the reflux condenser that is used while heating and stirring?
Answers
Answer:
reflux condenser is often used in organic extractions
Explanation:
As organic compounds are inflammable, there can be an explosion..when you use the condenser everything happens in aqueous medium and vapours comeback as liquid.you are safe
Calculate the standard potential, ∘, for this reaction from its equilibrium constant at 298 K. X(s)+Y3+(aq)↽−−⇀X3+(aq)+Y(s)=6.90×10−8 X ( s ) + Y 3 + ( aq ) ↽ − − ⇀ X 3 + ( aq ) + Y ( s ) K = 6.90 × 10 − 8
Answers
Answer: The standard potential is -0.141 V
Explanation:
To calculate the Gibbs free energy for given value of equilibrium constant we use the relation:
\(\Delta G=-RTlnK\)
where,
= standard Gibbs free energy = ?
R = Gas constant = 8.314 J/Kmol
T = temperature = 298 K
K = equilibrium constant =
Putting values in above equation, we get:
\(\Delta G=40853J\)
Also \(\Delta G=-nFE^0\)
where n = no of electrons gained or lost = 3
F = Faradays constant = 96500 C
\(E^0\) = standard potential = ?
\(40853=3\times 96500\times E^0\)
\(E^0=-0.141V\)
Thus the standard potential is -0.141 V
()3C− − on reaction with HI gives () − − as
the main products and not () − and −
Answers
3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I.
When 3C⁻⁻ is reacted with HI, the reaction product obtained is I⁻⁻⁻ as the main product. The C₂H₅I and H⁻ are not produced in significant quantities and cannot be considered the main product.The 3C⁻⁻ compound reacts with HI in the presence of a solvent to produce hydrogen gas, H⁻, C₂H₅I, and I⁻⁻⁻. The primary product obtained is I⁻⁻⁻ because it is stable and has a higher energy than C₂H₅I and H⁻.However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions. The reaction must be carried out in anhydrous conditions and at a low temperature so that the reaction proceeds in the desired direction.
3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I. However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions.
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what chemical properties does soap have that makes it a good cleaning agent?
Answers
Answer:
Soap is an excellent cleanser because of its ability to act as an emulsifying agent. An emulsifier is capable of dispersing one liquid into another immiscible liquid. This means that while oil (which attracts dirt) doesn't naturally mix with water, soap can suspend oil/dirt in such a way that it can be removed.
Soap acts as a cleaner because of its ability to act as an emulsifying agent. A soap molecule has a polar head and a nonpolar tail. Soap consists of a carbon chain where one end attracts oil and the other attracts water.
What is the cleaning action of soap?Most of dirt can be described as oily in nature as oil does not dissolve in water. The molecule of soap consists of sodium salts of long-chain carboxylic acids. In soaps, the chain of carbon atoms dissolves in the oil, and the ionic or polar end of the soap molecule dissolves in water.
The soap molecules produce structures known as micelles. In micelles, one end faces the oil droplet, and the other end which is ionic in nature faces outside. Therefore, soap can form an emulsion in water and supports in dissolving the dirt when we wash our clothes.
Soap can be described as a kind of molecule in which both ends have different properties. The hydrophilic end dissolves water and is attracted to it whereas the hydrophobic end is dissolved in hydrocarbons and is water repulsive in nature.
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What is the base name for the following compound?
C-C=0
ဝ
H
H
Answers
Answer:
butane I think
Explanation:
which of the following statements is false? (a) the properties of n2(g) will deviate more from ideality at -100oc than at 100oc. (b) van der waal's equation corrects for the non-ideality of real gases. (c) molecules of ch4(g) at high pressures and low temperatures have no attractive forces between each other. (d) molecules of an ideal gas are assumed to have no significant volume. (e) real gases do not always obey the ideal gas laws.
Answers
Molecules of ch4(g) at high pressures and low temperatures have no attractive forces between each other is a false statement.
Increasing the pressure and decreasing the temperature decreases the average distance between both the molecules, so the volume of molecules and their interaction must be considered.
Various theories explain the nature of gases and how other factors such as pressure, volume, and temperature influence the character of gases. The expressions relating volume, pressure, temperature, and number of moles are connected by the equations known as an ideal gas equation, Boyle's law, Charles' law, and Gay-lussac's law.
Only at Elevated temperature and relatively low pressure do real gases function like ideal gases. For ideal gases, we recognize intermolecular forces to be negligible and the size of individual gas molecules to be significantly smaller than intermolecular distances.
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The largest source of background ionizing radiation in the United States is _____, which is formed in the decay series of uranium.
Answers
The correct statement will be"The largest source of background ionizing radiation in the United States is Radon (Rn)which is formed in the decay series of uranium."
What is the largest source of background ionizing radiation in the United States?Generally, Ionizing radiation is simply defined as a state of energy that works by releasing electrons from their parent atoms or the molecules of materials.
In conclusion, Radon (Rn) a chemical element of Group 18 in the periodic table is the largest source of background ionizing radiation in the United States.
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what is the value of a in the following nuclear reaction? 230 90th→226 88ra+azx
Answers
The value of A in the nuclear reaction 230⁹⁰Th → 226⁸⁸Ra + AZX is 4.
In the given nuclear reaction, the parent nucleus is represented as 230⁹⁰Th, and it decays into two daughter particles: 226⁸⁸Ra and an unknown particle represented as (AZX). We need to determine the value of "a" in the reaction.
To find the value of "a," we need to consider the conservation of both mass number (A) and atomic number (Z) in the nuclear reaction.
In the parent nucleus, Thorium-230 (230⁹⁰Th), the mass number (A) is 230, and the atomic number (Z) is 90.
In the daughter nucleus, Radium-226 (226⁸⁸Ra), the mass number (A) is 226, and the atomic number (Z) is 88.
According to the conservation of mass number (A), the sum of the mass numbers in the parent nucleus should be equal to the sum of the mass numbers in the daughter nucleus and the unknown particle. Therefore, we have:
230 = 226 + a
Simplifying the equation, we can solve for "a":
a = 230 - 226
a = 4
Hence, the value of "a" in the given nuclear reaction is 4. This means that the unknown particle (AZX) has a mass number of 4.
The atomic number of the unknown particle (Z) can vary depending on the specific isotope or element involved in the decay.
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The mole fraction of O2 in air is 0.21. If the total pressure is 0.83 atm and kH is 1.3 x 10-3 M/atm for oxygen in water, calculate the solubility of O2 in water.
2.3 x 10⁻⁴ M
1.1 x 10⁻³ M
2.7 x 10⁻⁴ M
1.3 x 10⁻³ M
Impossible to determine
Answers
Given that the mole fraction of O2 in the air is 0.21, the total pressure is 0.83 atm, and Henry's law constant (kH) for O2 in water is 1.3 x 10-3 M/atm, the solubility of O2 in water can be calculated to be 2.7 x 10⁻⁴ M.
According to Henry's law, the solubility of a gas (in this case, O2) in a liquid (water) is given by the equation: C = kH * P, Where: C is the concentration of the gas in the liquid (solubility),kH is Henry's law constant for the specific gas, P is the partial pressure of the gas. Given that the mole fraction of O2 in the air is 0.21, we can calculate the partial pressure of O2 in the air as follows: PO2 = XO2 * PT, Where: PO2 is the partial pressure of O2, XO2 is the mole fraction of O2 in air, PT is the total pressure. Substituting the given values, we have PO2 = 0.21 * 0.83 atm = 0.17343 atm. Now, we can calculate the solubility of O2 in water using Henry's law: C = kH * P = (1.3 x 10-3 M/atm) * (0.17343 atm) ≈ 2.7 x 10⁻⁴ M.
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The formula of the gas ozone is O 3. What is the volume of 48g of ozone at r.t.p?
Answers
Answer:
1.8 x 10^ 24 atoms of oxygen
Explanation:
The molecular weight of ozone is known to be 48 grams / mol. Here we are given a sample of 48 grams of ozone as well, so in 48 grams of ozone the number of moles = 48 / 48 = 1,
_______________________________________________________
1 mole of ozone is equal to 6.0221415 × 10^23 molecules of ozone. Respectively, 1 molecule of ozone has 3 atoms of oxygen. Thus, you can conclude the following -
3 * 6.0221415 × 10^23 = ( About ) 1.8 x 10^ 24 atoms of oxygen
Hope that helps!
The volume of 48 grams of ozone at room temperature and pressure (r.t.p) is equal to 24 \(dm^3\).
Given the following data:
Mass of ozone = 48 grams.Scientific data:
Molar mass of ozone = 48 g/mol. Avogadro's number = \(6.02 \times 10^{23}\)To determine the volume of 48 grams of ozone at room temperature and pressure (r.t.p):
First of all, we would calculate the number of moles of ozone contained in 48 grams of ozone by using the formula:
\(Number\;of\;moles = \frac{mass}{molar\;mass}\\\\Number\;of\;moles = \frac{48}{48}\)
Number of moles = 1.0 moles
By stoichiometry:
1 mole of ozone = 24 \(dm^3\)
Note: At room temperature and pressure (r.t.p), the volume of any gas is equal to 24 \(dm^3\) or 24,000 \(cm^3\).
In conclusion, the volume of 48 grams of ozone at room temperature and pressure (r.t.p) is equal to 24 \(dm^3\).
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HELPPP. What is the molarity (molar concentration) of a 500.0mL that contains 5.60g of KOH? Please show your work, with units, and include a therefore statement.
Answers
Answer:
.2 M
Explanation:
grams/molar mass=ans./volume(L)=molarity
5.6/56=ans./.500=.2 M
- Hope that helps! Please let me know if you need further explanation.
Chemical compound responsible for ocean acidification in the open oceans of the world.
Answers
Answer:
The chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide
The chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide.
What is ocean acidification?Ocean acidification is the global decrease in seawater pH caused by the oceans' extensive uptake of atmospheric carbon dioxide (CO2) in the atmosphere. Ocean acidification is primarily caused by the Earth's atmosphere being overburdened with massive amounts of CO2, which is created by automobiles, industrial processes, and agricultural activities.
A third to a half of the CO2 produced into the atmosphere by human activity since the start of the Industrial Revolution, or around 1750, is being absorbed by the oceans. Scientists believe that at that time, seawater's average pH decreased between 8.19 to 8.05, representing a 30% increase in acidity. The chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide.
Therefore, the chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide.
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which formula will give you the area of a parallelogram
Answers
The formula for finding the area of a parallelogram is given by the product of the base and the height.
For any parallelogram, the base and the height should be perpendicular to each other. In order to determine the area of a parallelogram, the base and height need to be measured first. The base is the distance between two opposite sides of the parallelogram. On the other hand, the height of a parallelogram is the perpendicular distance from the base to the opposite side. Once these measurements have been taken, the area of the parallelogram can be determined using the formula:
Area of parallelogram = base x height.
This formula holds true for all types of parallelograms, regardless of the size of the shape. Therefore, it can be used to calculate the area of any parallelogram by simply substituting the appropriate values for the base and height.
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when methanol (ch oh) and vinegar (ch cooh) are allowed to react, ethyl methanoate and water are produced from the esterification reaction. true false
Answers
The statement "When methanol (CH OH) and vinegar (CH COOH) are allowed to react, ethyl methanoate and water are produced from the esterification reaction" is false.
What is Esterification?
Esterification is a reaction that involves alcohol reacting with a carboxylic acid in the presence of a concentrated acid catalyst. Esters, which are sweet-smelling compounds, are formed when these compounds react. Methanol is an alcohol with a chemical formula of CH OH and vinegar is a carboxylic acid with a chemical formula of CH COOH.
Methanol and vinegar can undergo esterification reactions, but they would not produce ethyl methanoate. Ethyl methanoate, also known as methyl ethanoate, is an ester that is created by reacting ethanol and methanoic acid.
As a result, the provided statement is false since the products formed by the esterification of methanol and vinegar are methyl acetate and water.
Thus, the correct statement would be: When methanol and vinegar are allowed to react, methyl acetate and water are produced from the esterification reaction.
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Lemon juice has a pH of about 2.3 which
means it is considered to be in the
range.
a.acidic
b.basic
Answers
Answer:
Acidic
Explanation:
the pH scale ranges from 0 to 14, where 7 means the substance is neutral. Less than 7 means the substance is Acidic. Greater than 7 means the substance is Basic.
Remember that the lower the pH is, the more Acidic the substance is. In this case lemon juice is Acidic.
the isotope 146c has a half life of 5730 years. what fraction of 146c in a sample with mass ,m, after 28650 years
Answers
Answer:
3.1% is the fraction of the sample after 28650 years
Explanation:
The isotope decay follows the equation:
Ln[A] = -kt + Ln[A]₀
Where [A] could be taken as fraction of isotope after time t, k is decay constant and [A]₀ is initial fraction of the isotope = 1
k could be obtained from Half-Life as follows:
K = Ln 2 / Half-life
K = ln 2 / 5730 years
K = 1.2097x10⁻⁴ years⁻¹
Replacing in isotope decay equation:
Ln[A] = -1.2097x10⁻⁴ years⁻¹*28650 years + Ln[1]
Ln[A] = -3.4657
[A] = 0.0313 =
3.1% is the fraction of the sample after 28650 years
How many grams of AlCl3 are needed to completely react with 2.25 of NaOH?
Answers
Explanation:
hope the picture above help u understand I did it in step so it would be easier to understand:)
Problem: Co3+ | Co2+ and Ni2+ | NiAnode?Cathode?(You need to use Reference Table B-16.)a. Co2+b. can't answerc. Ni2+d. Nie. Co3+
Answers
Answer:
- Anode: Co3+ | Co2+
- Cathode: Ni | Ni2+
Explanation:
The anode is where oxidation reaction occurs, and the cathode is where reduction reaction occurs.
From the table of reduction potencials, we find that:
- Co reaction:
\(\begin{gathered} Co^{3+}+2e^-\rightarrow Co^{2+} \\ E=1.81\text{ }V \end{gathered}\)- Ni reaction:
\(\begin{gathered} Ni\rightarrow Ni^{2+}+2e^- \\ E=-0.250\text{ V} \end{gathered}\)Now, to find out which one is the anode and which one is the cathode, it is necessary to compare the reduction potencials.
The reaction of Ni have negative potentials, so Ni will be the anode and Co will be the cathode.