Answer:
The percent composition by mass of a component in a mixture is given by:
percent composition = (mass of component / total mass of mixture) x 100%
In this case, the component is sucrose, and the total mass of the mixture is the sum of the mass of sucrose and the mass of water. We have:
mass of sucrose = 4.6 g mass of water = 72.9 g total mass of mixture = mass of sucrose + mass of water = 4.6 g + 72.9 g = 77.5 g
Substituting these values into the formula, we get:
percent composition of sucrose = (4.6 g / 77.5 g) x 100% = 5.94%
Rounding to the tenths place, we get:
percent composition of sucrose ≈ 5.9%
Therefore, the percent composition of sucrose in the mixture is approximately 5.9%.
i hope this helps you
How many moles of helium gas would be required to fill a 22 L container at a temperature of 35 oC and a pressure of 3.1 atm?
To solve this problem, we can use the ideal gas law:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
We need to convert the temperature from Celsius to Kelvin by adding 273.15:
T = 35°C + 273.15 = 308.15 K
We also need to convert the volume from liters to cubic meters:
V = 22 L = 0.022 m³
Now we can solve for n:
n = PV / RT
n = (3.1 atm) (0.022 m³) / (0.08206 L·atm/mol·K) (308.15 K)
n = 0.00268 mol
Therefore, we would need 0.00268 moles of helium gas to fill a 22 L container at a temperature of 35°C and a pressure of 3.1 atm.
What is pressure?
It is typically measured in units of Pascals (Pa) or atmospheres (atm). Pressure can be calculated using the equation P = F/A, where P is pressure, F is the force being applied, and A is the area over which the force is being applied.In a gas, pressure is the result of the collisions of gas particles with the walls of the container. The more particles there are in a given volume, the higher the pressure will be. Additionally, increasing the temperature of a gas will increase the pressure if the volume and number of particles are held constant, due to the increased speed and force of the gas particles.To know more about pressure, click the link given below:
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In nuclear fission reactions, what causes the atom's nucleus to become unstable?
A.
The nucleus absorbing freely moving protons
B.
Extreme temperatures released by fuel rods
C.
The absorption of a free-moving neutron by the atom's nucleus
D.
Control rods being inserted into the nucleus
The absorption of a free-moving neutron by the atom's nucleus is what causes the atom's nucleus to become unstable in nuclear fission reactions.
What is nuclear fission?
Nuclear fission is a process where the nucleus of an atom is split into two or more smaller nuclei, along with the release of a large amount of energy. This process typically occurs when a free neutron collides with the nucleus of a heavy atom, such as uranium-235 or plutonium-239. When the nucleus absorbs the neutron, it becomes highly unstable and splits apart into two or more smaller nuclei, which can then go on to collide with other nuclei and split apart in a chain reaction.
The energy released in the process of nuclear fission is used to generate electricity in nuclear power plants, and also has applications in nuclear weapons. However, the process also creates radioactive waste materials that must be carefully managed and disposed of due to their potential hazards to human health and the environment.
C. The absorption of a free-moving neutron by the atom's nucleus is what causes the atom's nucleus to become unstable in nuclear fission reactions.
When a neutron is absorbed by the nucleus, it can cause the nucleus to become so unstable that it splits apart into two smaller nuclei and releases additional neutrons and energy in the process. This chain reaction of nuclear fission can be controlled and harnessed for use in nuclear power plants.
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wHAT HAPPENS IF THE CIRCUIT IS LEFT OPEN FOR A VERY LONG TIME
Answer:
please make me brainalist and keep smiling dude I hope helped you
please thank all of my answer
Explanation:
If the electric circuit is left open then there will be an incomplete path to drift the electron in that case no drift velocity of the electron is observed, hence there is no flow of current in the circuit.Skeleton equation for lithium bromide produces lithiùm and bromine when heated
Lithium and bromine are created when lithium bromide is heated, according to the following skeleton equation: [tex]Li(s) + Br2 = LiBr(s) (g).[/tex]
A skeleton equation is a condensed description of a chemical reaction that only displays the reactants and products—not their quantities or the circumstances under which the reaction takes place—of the process. It is a simple description of the reaction that can be used to pinpoint the components involved and the reaction's overall nature. A skeleton equation, however, does not fully describe the reaction because it does not account for the quantity of atoms or the charges of the ions involved. It is required to balance the equation, take into account the state and charge of each ion, as well as the reaction conditions, in order to completely comprehend the reaction.
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A company extracts sodium from its ore by electrolysis. Calculate the mass of sodium extracted from 1 tonne (1000kg) of ore that is 65% waste material.
Answer:
315 kg
Explanation:
If the ore is 65% waste material, then the mass of the actual sodium in 1 tonne of ore is:
mass of sodium = 0.35 x 1000 kg = 350 kg
The process of electrolysis separates the sodium from the other components of the ore. The amount of sodium extracted will depend on the efficiency of the electrolysis process, which is typically measured by its Faraday efficiency.
The Faraday efficiency is the ratio of the amount of substance actually produced by electrolysis to the amount predicted by the theoretical stoichiometry of the reaction. For the electrolysis of sodium, the theoretical stoichiometry is:
2 Na+ + 2 e- → 2 Na
This reaction requires 2 moles of electrons (2 Faradays) to produce 2 moles of sodium.
If we assume a Faraday efficiency of 90%, this means that 90% of the theoretical amount of sodium is actually produced by electrolysis. Therefore, the mass of sodium extracted from 1 tonne of ore would be:
mass of sodium extracted = 0.9 x (2/2) x 350 kg = 315 kg
So, the company would extract 315 kg of sodium from 1 tonne of ore that is 65% waste material, assuming a Faraday efficiency of 90%.
Which statement describes the formation of galaxies?
They begin in nebulas.
Heat and gases contract.
Gravity causes stars to cluster.
Dust and gases contract.
The statement "Gravity causes stars to cluster" describes the formation of galaxies. Galaxies are vast collections of stars, gas, and dust held together by gravity.
What is gravity?
A fundamental force in the cosmos that draws things together is called gravity. All objects with mass are attracted to one another because to this force, which also keeps the planets in their orbits around the sun.
Einstein's theory of general relativity, which asserts that matter warps space-fabric time's and creates a gravitational field that causes objects to travel along curved pathways, is used to explain gravity. The mass of the objects and the separation between them determine the gravitational force's strength; bigger masses and closer separations provide a stronger gravitational pull.
The statement "Gravity causes stars to cluster" describes the formation of galaxies. Galaxies are vast collections of stars, gas, and dust held together by gravity. The formation of galaxies is a complex process that involves the gravitational collapse of a large cloud of gas and dust, leading to the formation of stars and the clustering of those stars into galaxies. This process is influenced by various factors, including the initial conditions of the gas cloud, the amount of dark matter present, and the interactions between galaxies.
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Galaxies are created as a result of the phenomenon known as star clustering due to gravity.
What is Gravity?
Gravity is a fundamental force of nature that causes physical objects to attract each other. It is the force that causes objects with mass to be drawn towards each other. Gravity is a universal force that affects all objects with mass, no matter how small or large they are. The strength of gravity depends on the mass of the objects involved and the distance between them. The force of gravity was first described by Sir Isaac Newton in his law of universal gravitation, and it was later refined by Albert Einstein's theory of general relativity. Gravity plays a fundamental role in shaping the structure of the universe, from the smallest particles to the largest structures such as galaxies and clusters of galaxies.
Galaxies are formed when gravity pulls together vast clouds of gas and dust, causing them to collapse and form stars. Over time, these stars cluster together to form galaxies. The other statements also describe various aspects of star and galaxy formation, but the statement that best describes the formation of galaxies is the one about gravity causing stars to cluster.
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Please help! Ty
How many protons, neutrons,
and electrons are in this ion?
31 P3-
15
A. 15 p+, 16 nº, 18 e
B. 16 pt, 15 nº, 19 e
C. 15 pt, 16 nº, 15 e-
D. 15 pt, 16 nº, 12 e-
Explanation:
The symbol P represents the element phosphorus, which has an atomic number of 15, indicating that it has 15 protons in the nucleus. The ion is negatively charged with a 3- charge, which means it has three more electrons than protons.
To find the number of neutrons in an atom or ion, you need to know its mass number, which is the sum of protons and neutrons. Since the charge of the ion is not related to its mass, we can assume that the mass number is the same as that of the neutral phosphorus atom, which is approximately 31.
So, the number of protons, neutrons, and electrons in the P3- ion is:
Protons: 15
Neutrons: 31 - 15 = 16
Electrons: 15 + 3 = 18
Therefore, the P3- ion has 15 protons, 16 neutrons, and 18 electrons.
how many moles are in 7.14x10 molecules of O2
Answer:
1.186x10^12
Explanation:
Chemical explanation of capillary action
Answer:
Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules. The height to which capillary action will take water in a uniform circular tube (picture to right) is limited by surface tension and, of course, gravity.
Capillary action is the phenomenon where a liquid rises in a narrow tube, such as a glass capillary or a plant stem, due to the adhesive and cohesive forces between the liquid and the tube. This phenomenon can be explained by a combination of intermolecular forces, namely adhesion and cohesion.
Adhesion refers to the attractive forces between unlike molecules. In the case of capillary action, the adhesive forces between the liquid and the walls of the capillary tube allow the liquid to "wet" the tube, which means that the liquid molecules adhere to the tube's surface. The strength of the adhesive forces depends on the chemical nature of the liquid and the tube's material. For example, water is attracted to glass due to the presence of polar groups on the glass surface.
Cohesion, on the other hand, refers to the attractive forces between like molecules. The cohesive forces between the liquid molecules cause them to stick together, forming a meniscus, which is the curved surface of the liquid in the tube. The cohesive forces are usually stronger than the adhesive forces, causing the liquid to rise in the tube against the force of gravity.
The height that the liquid rises in the tube depends on the balance between the adhesive and cohesive forces, as well as the diameter of the tube. A narrower tube will have a greater capillary rise than a wider one because the liquid experiences a greater amount of adhesive forces with the tube's surface in a narrower tube.
In summary, capillary action is a result of the interplay between adhesive and cohesive forces, which causes a liquid to rise in a narrow tube. Adhesion allows the liquid to wet the tube, while cohesion causes the liquid molecules to stick together, forming a meniscus that rises in the tube against the force of gravity.
Calculate the energy of a photon with wavelength of 4.50 × 103 nm.
4.42 × 10–20 J
1.42 × 10–28 J
2.30 × 1045 J
4.71 × 10–29 J
Answer: 4.71 × 10–29 J
Explanation:
Question
3. Calculate the energy of a photon with a wavelength of 4.50 x 103 nm. 1 point 4.71 x 10-29) 1.42 x 10-28) 4.42 x 10-20) 2.30 x 1045)
Based on the color of the flame emitted by known compounds, what could be the metallic ion present in each of unknown solid
The color of the flame emitted by known compounds can be used to help identify the metallic ion present in an unknown solid. Different metallic ions produce different flame colors when they come into contact with a flame.
Metal ions in unknown substances can be identified through flame tests thanks to their distinctive emission spectra.
The metallic ion contained in an unknown material can be determined using the color of the flame produced by known compounds.
When in contact with a flame, different metal ions produce distinct flame colors: sodium creates a yellow flame, whereas potassium creates a violet flame.
The presence of a metallic ion can be determined by contrasting the flame colors of the known compounds with the flame of the unknown solid.
A spectroscope must be used to evaluate the flame in order to precisely identify the metal ions contained in an unidentified substance. This can lead to a more precise identification and a more thorough investigation of the emission spectra.
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A hockey player attempts to make a goal by sliding the puck across the frictionless ice.
What are the forces acting on the hockey puck as soon at it breaks contact with the stick?
Friction
Gravity
Normal
Contact (Push)
A hockey player attempts to make goal by sliding the puck across frictionless ice, forces acting on the hockey puck as soon at it breaks contact with the stick is gravity.
What is meant by frictionless surface?Frictionless surface is surface with no resistance between a surface or substance and something that is moving along or through it.
As soon as hockey puck breaks contact with the stick, only force acting on the puck is the force of gravity. As the ice is assumed to be frictionless, there is no frictional force acting on puck.
Normal force, which is the force exerted by ice on the puck perpendicular to surface of the ice, cancels out the force of gravity in vertical direction, but it does not affect the motion of puck in the horizontal direction. And finally, there is no contact force acting on puck as it is no longer in contact with the stick.
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Pine trees, strawberry plants, and cacti are all plants. Name charateristics that you think scientists could use to seperate these members of the Plantae kingdom into smaller groups
The characteristics that separate Pine trees, strawberry plants, and cacti of the Plantae kingdom into smaller groups is Gymnosperm or angiosperms, seeds, location.
All plants belong to the kingdom Plantae. They are multicellular, eukaryotic, and autotrophic creatures. A stiff cell wall is present in each plant cell. Chloroplasts and the pigment chlorophyll are present in plants, which are necessary for photosynthesis.
Plant species can be distinguished by the following characteristics:
Angiosperms or gymnosperms: Strawberry plants are angiosperms, but pine trees are gymnosperms. Cactus is a gymnosperm as well.
Plants can be classified according on their habitat. Cactus, for example, is a desert plant, although pine and strawberries are not. They are either seed-producing or spore-producing plants; pines are spore-producing plants. Strawberry plants produce seeds.
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There are three stable atoms of Argon (Atomic Number 18): Argon-36, Argon-38 and
Argon-40. What would the atoms of these isotopes have in common? What would
be different about their atoms?
They would all have the same atomic number but they would have different mass numbers.
What are isotopes?Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. Since the number of neutrons affects the atomic mass of an element, isotopes of the same element can have different masses.
Isotopes of an element have the same number of protons, which determines the element's atomic number. Isotopes can have different physical and chemical properties due to their different masses.
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How do covalent bonds differ from ionic bonds?
Answer: Covalent bonds share electrons between two or more atoms. Ionic bonds form when two or more ions come together with charge differences.
Explanation:
Ionic bonds: atoms TRANSFER electrons
Covalent: atoms SHARE electrons
Question 3 (1 point) The diagram on the below shows water molecules and ions from an NaCl crystal. What is the most likely reason that each water molecule is arranged so that the oxygen part of the molecule faces a sodium ion?
Answer:
There is attraction between oxygen atom and sodium ion due to their significant electonegative difference so therefore they face each other........
Find the empirical formular of a compound formed when 2. 7g of alminium forms 5. 1 of its oxide
The empirical formula of the compound formed when 2.7g of aluminum forms 5.1g of its oxide is Al2O3.
To find the empirical formula, first calculate the molar mass of aluminum oxide by multiplying the molar mass of aluminum (26.98 g/mol) and the molar mass of oxygen (15.99 g/mol) and adding them together (26.98 g/mol + 15.99 g/mol = 42.97 g/mol).
Next, divide the given mass of aluminum oxide (5.1g) by the molar mass of aluminum oxide (42.97 g/mol) to calculate the number of moles of aluminum oxide (5.1g/42.97 g/mol = 0.119 mol).
Next, divide the given mass of aluminum (2.7g) by the molar mass of aluminum (26.98 g/mol) to calculate the number of moles of aluminum (2.7g/26.98 g/mol = 0.100 mol).
Now calculate the mole ratio of aluminum to oxygen by dividing the number of moles of aluminum by the number of moles of oxygen (0.100 mol/0.119 mol = 0.8403).
Finally, express this ratio in terms of whole numbers. The empirical formula of the compound formed is Al2O3.
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(NEED HELP ASAP) Which statement is true about the particles of a solid when the solid changes into a liquid?
-They stop vibrating.
-Their kinetic energy increases.
-They move closer to each other.
-The attractive force between them increases.
When a solid changes into a liquid, the particles of the solid move farther apart and gain kinetic energy. Therefore, the statement that is true about the particles of a solid when the solid changes into a liquid is: their kinetic energy increases.
What is Kinetic Energy?
It is a scalar quantity and is dependent on the mass and velocity of an object. The formula for kinetic energy is:
Kinetic energy = (1/2) * mass * velocity^2
In a solid, the particles are tightly packed and vibrate in a fixed position. When the solid is heated or the pressure is reduced, the kinetic energy of the particles increases and they begin to vibrate faster and move slightly away from their fixed positions. This causes the solid to start melting and the particles begin to slide over each other, forming a liquid. Therefore, the particles of the solid move apart and gain kinetic energy when the solid changes into a liquid.
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a. If 0.25 mol Na2CO3 completely reacts with excess HCl, how many moles of NaCl and CO2
will be produced, respectively?
b. If 6.02 x 1022 particles of NaBr completely react with excess Ca(OH)2, how many particles of NaOH will be produced?
c. If 204.45 g of NH3 is completed used up in the reaction, how many grams of (NH4)2SO4 will be produced?
d. If 1 mol C5H9O reacts with 2 mol O2, how many mol of CO2 will be produced?
If 0.25 mol Na₂CO₃ completely reacts with excess HCl, 0.5 moles of NaCl and 0.25 mole of CO₂ respectively.
If 6.02 x 10²² particles of NaBr completely react with excess Ca(OH)₂, 6.02 x 10²² particles of NaOH will be produced
If 204.45 g of NH₃ is completed used up in the reaction, 794.5g of (NH₄)₂SO₄ will be produced.
If 1 mol C₅H₉O reacts with 2 mol O₂, 5 moles of CO₂ will be produced.
What is mole concept?
Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Given,
a. 0.25 mol Na₂CO₃
Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂
1 mol Na₂CO₃ forms 2 moles of NaCl and 1 mole of CO₂.
0.25 mol Na₂CO₃ forms 0.5 moles of NaCl and 0.25 mole of CO₂.
b. 6.02 x 10²² particles of NaBr
2NaBr + Ca(OH)₂ → CaBr₂ + 2NaOH
2 moles of NaBr forms 2 moles of NaOH
Hence, 6.02 x 10²² particles of NaBr forms 6.02 x 10²² particles of NaOH.
c. Mass of NH3 = 204.45 g
2NH₃ + H₂SO₄ → (NH₄)₂SO₄
34g of NH₃ forms 132.14g of (NH₄)₂SO₄
204.45 g of NH₃ forms 794.5g of (NH₄)₂SO₄
d. 1 mol C₅H₉O
4C₅H₉O + 27O₂ → 20CO₂ + 18H₂O
4 mol C₅H₉O forms 20 moles CO₂
1 mole C₅H₉O forms 5 moles CO₂
Therefore, If 0.25 mol Na₂CO₃ completely reacts with excess HCl, 0.5 moles of NaCl and 0.25 mole of CO₂ respectively.
If 6.02 x 10²² particles of NaBr completely react with excess Ca(OH)₂, 6.02 x 10²² particles of NaOH will be produced
If 204.45 g of NH₃ is completed used up in the reaction, 794.5g of (NH₄)₂SO₄ will be produced.
If 1 mol C₅H₉O reacts with 2 mol O₂, 5 moles of CO₂ will be produced.
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Floods can drastically change the land in an area due to
Explanation:
Floods can drastically change the land in an area due to what is known as erosion. Erosion is the process of water carrying away small pieces of rock and soil. Over time, this can lead to large changes in the landscape. Floods can also deposit sediment, which can change the land in a different way. Deposition is the process of sediment being left behind by water. This can cause the land to become higher in some areas and lower in others.
Calculate the ΔGr0 of the following reaction and state whether it is spontaneous at standard temperature or not. (You will need Table B-12 in your CRG.)
2HCl(aq) + Ca(OH)₂(s) CaCl₂(s) +2H₂O(1)
O 6.5 kJ, yes
O 61.5 kJ, no
O 61.5 kJ, no
O 6.5 kJ, no
O-61.5 kJ, yes
-
Explanation:
The ΔG° of a reaction can be calculated using the formula:
ΔG° = ΔH° - TΔS°
where ΔH° is the standard enthalpy change, ΔS° is the standard entropy change, and T is the absolute temperature in Kelvin.
From Table B-12 in the CRG, we have:
ΔH° = -65.2 kJ/mol for the reaction
ΔS° = -111.7 J/(mol*K) for the reaction
We need to convert ΔS° to kJ/(molK):
ΔS° = -111.7 J/(molK) × (1 kJ/1000 J) = -0.1117 kJ/(mol*K)
Now we can calculate ΔG°:
ΔG° = ΔH° - TΔS°
ΔG° = -65.2 kJ/mol - (298 K) × (-0.1117 kJ/(mol*K))
ΔG° = -65.2 kJ/mol + 33.4 kJ/mol
ΔG° = -31.8 kJ/mol
The negative value of ΔG° indicates that the reaction is spontaneous at standard temperature. Therefore, the answer is: 6.5 kJ, yes. However, this is not one of the options provided.
MgCl2 is electrolyzed to produce Mg and Cl2. 1311 g of MgCl2 decomposed, what is the percent yield for this reaction if 246.43 g of magnesium are recovered ?
PLEASE HELP
***write a balanced equation
The percent yield for this reaction is 147.2%.
What is a good percentage yield?
A good percentage yield depends on the specific reaction and the conditions under which it is performed. In general, a high percentage yield (e.g. 90% or higher) is desirable, as it indicates that the reaction is efficient and that little of the starting material was wasted. However, a 100% yield is often not possible in practice due to factors such as incomplete reactions, impurities in the reactants, and loss of product during isolation and purification.
The balanced equation for the electrolysis of MgCl2 is:
2 MgCl2(l) → 2 Mg(l) + Cl2(g)
To calculate the percent yield, we need to first find the theoretical yield of magnesium. This can be calculated using stoichiometry and the given amount of MgCl2:
Molar mass of MgCl2 = 95.211 g/mol
Moles of MgCl2 = 1311 g / 95.211 g/mol = 13.77 mol
From the balanced equation, 2 moles of Mg are produced for every 2 moles of MgCl2.
Therefore, moles of Mg produced = 13.77 mol / 2 = 6.885 mol
Theoretical yield of Mg = 6.885 mol x 24.305 g/mol = 167.38 g
Now we can calculate the percent yield using the actual yield of Mg:
Percent yield = (Actual yield / Theoretical yield) x 100%
Percent yield = (246.43 g / 167.38 g) x 100% = 147.2%
Therefore, the percent yield for this reaction is 147.2%.
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A sample of oxygen, O 2 , occupies 32.2 mL at 30 °C and 452 torr. What volume will it occupy at –70 °C and the same pressure?
The sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.
What is the pressure of gas?The force exerted by a gas on specific area is known as gas pressure..
As we know, (P₁ V₁) /(T₁) = (P₂V₂) /(T₂)
Given, P₁ is the initial pressure (452 torr); V₁ is initial volume (32.2 mL)
T₁ is initial temperature in Kelvin (30 °C + 273.15 = 303.15 K)
P₂ is final pressure (452 torr); V₂ is final volume (what we want to find)
T₂ is the final temperature in Kelvin (-70 °C + 273.15 = 203.15 K)
Now, V2 = (P₁ V₁ T₂) / (P2 T₁)
V₂ = (452 torr x 32.2 mL x 203.15 K) / (452 torr x 303.15 K)
V₂ ≈ 18.5 mL
Therefore, the sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.
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3 part Question!
What is the approximate period of this wave?
What is the wavelength of this wave?
What is the frequency of this wave?
A wave is defined as a disturbance which transfer energy and momentum from one point to another in a medium. They are mainly of two types, they are longitudinal and transverse.
What is a wavelength?The distance travelled by the wave during one complete oscillation is defined as the wavelength. The SI unit of wavelength is meter (m). It can also be defined as the distance between two successive crests or troughs of a wave.
The number of oscillations of a wave per unit time is frequency and the time needed to form one complete wave is called the period.
The total number of waves = 6
Period (T) = 60/6 = 10 s
The wavelength of the wave = 10 m
Frequency = 1/T = 1 / 10 = 0.1 Hz
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If ph of a solution is 11.2, Find Conc. of [OH-] ions
If the pH of a solution is 11.2, then the concentration of [OH-] is 1.585×10³M.
The pH of a solution is a measure of the concentration of hydrogen ions (H+), which in turn is a measure of acidity.
Given : pH of a solution=11.2
we know that pH + pOH = 14
pOH = -log[OH-]
pOH = 14 - pH
= 14 - 11.2
pOH = 2.80
-log[OH-] = 2.80
log[OH-] = -2.80
[OH-] = 10∧-2.80
[OH-] = 1.585 ×10∧-3 M.
If I have 9.6 moles of a gas at a pressure of 2.17 atm and a temperature of 112 C, what is the
volume of the container?
Answer:
171.5 liters
Explanation:
PV = nRT
convert the temperature from Celsius to Kelvin:
T = 112 C + 273.15 = 385.15 K
substitute the given values into the ideal gas law:
V = (nRT)/P
V = (9.6 mol x 0.0821 L•atm/mol•K x 385.15 K)/2.17 atm
V = 171.5 L
The volume of the container is around 171.5 liters.
what is the mass of 2.23*10^23 atoms of sulfur
The mass of 2.23 × [tex]10^{23}[/tex] atoms of sulfur will be approximately equal to 11.9 grams.
How do you calculate the mass of 2.23 × [tex]10^{23[/tex] atoms of sulfur?One Sulphur atom has a mass of about 32.06 atomic mass units (u). As a result, the mass of 2.23 × [tex]10^{23}[/tex] Sulphur atoms can be estimated as follows:
Mass is determined by multiplying the number of atoms by the mass of one atom.
mass = 7.15 × [tex]10^{24}[/tex] u
We can use the following conversion factor to change the mass from atomic mass units to grammes:
1 u = 1.66054 × [tex]10^{24}[/tex] g
Mass = 1.19 x 101 g mass = 7.15 × [tex]10^{24}[/tex] u x 1.66054 x 10-24 g/u mass = 11.9 grams
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What happens to the molecular attraction and kinetic energy when gas to changes to liquid?
Answer:
the molecules in a liquid don't move apart.
Explanation:
The molecules of a gas move apart when they collide. The average kinetic energy of the particles in a liquid (or solid) is small enough that the forces of attraction between them is sufficient to hold the particles close together. The molecules in a liquid (or solid) do not move apart.
Answer: When a gas changes to a liquid, the molecules in the gas lose some of their kinetic energy and their molecular attraction increases.
Explanation:
In a gas, the molecules are moving around rapidly and colliding with each other and with the walls of the container. These collisions create pressure, and the average kinetic energy of the molecules is high. However, when the gas cools down, the average kinetic energy of the molecules decreases, and they move around more slowly.
As the gas cools down further, the molecules start to come closer together, and the intermolecular attractive forces become more important. Eventually, the attractive forces between the molecules become strong enough to overcome the kinetic energy of the molecules, and the gas condenses into a liquid.
In a liquid, the molecules are still in motion, but they are much closer together and have much lower average kinetic energy than in a gas. The attractive forces between the molecules are strong enough to keep them close together in a fixed volume, but not so strong that they are unable to move around freely.
2 NaOH + H2SO4 → 2 H2O + Na2SO4
How many grams of NaOH are required to produce 16 g of H2O ?
7.3g of NaOH are required to produce 16 g of H2O
What are molecular weight ?
The entire mass of the atoms required to form a molecule per mole, expressed in grams, is what makes up the molar mass, also known as the molecular weight. Grams per mole are used to measure molecular mass. To determine molecular weight, count the atoms in each element and increase the result by the element's atomic weight.
Caustic soda or lye are two other names for sodium hydroxide. It is a typical ingredient in soaps and cleansers. Sodium hydroxide is a colorless, odorless solid at room temperature. Sodium hydroxide is a white, odorless liquid.
39 g of NaOH gives 18g of H2O
? g of NaOH gives 16g of H2O
i.e 18*16/39g
i.e. 7.3g of NaOH are required to produce 16 g of H2O
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A sample of butane gas, C4H10, was collected over water at 28.0 °C and 754.4 torr. The wet gas volume is 1.00 L. What will be the volume of dry butane at 824.1 torr and 55.9 °C?
According to the question the volume of dry butane at 824.1 torr and 55.9 °C is 0.945 L.
What is volume?Volume is the measure of the three-dimensional space that an object or substance occupies. It is usually measured in cubic units such as milliliters (ml), liters (L), or cubic centimeters (cm3). Volume is an important physical property of substances because it helps to determine the amount of a material present in a given space.
We can use the Ideal Gas Law to calculate the volume of the dry butane gas.
The Ideal Gas Law states that PV = nRT, where P is pressure, V is volume, n is the number of moles of the gas, R is the ideal gas constant, and T is temperature.
First, we need to calculate the number of moles of butane gas, n, using the molar mass of butane, which is 58.12 g/mol.
n = (mass of gas)/(molar mass of gas)
n = (1.00 L * 754.4 torr * 0.08206 L*atm/mol*K * (283.15 K))/(58.12 g/mol * 101.325 kPa/atm)
n = 0.077 moles
Now that we know the number of moles of butane gas, we can calculate the volume of the dry butane gas at the new pressure and temperature.
V = (nRT)/P
V = (0.077 moles * 0.08206 L*atm/mol*K * (328.04 K))/(824.1 torr)
V = 0.945 L
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