at what temperature is the rms speed of h2 equal to the rms speed that o2 has at 350 k ?
Answers
The temperature of 21.875K, the rms speed of H₂ will be equal to the rms speed of O₂ at 350K. It is worth noting that this temperature is extremely low and is far below the freezing point of any gas, so this scenario is purely theoretical.
The root mean square (rms) speed of a gas molecule is given by the equation :- v(rms) = sqrt(3kT/m)
where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the molecular mass of the gas.
To find the temperature at which the rms speed of H2 is equal to the rms speed of O2 at 350K, we can set the two equations equal to each other:
sqrt(3kT/m_H2) = sqrt(3k(350)/m_O2)
Squaring both sides and simplifying gives:
T = (m_H2/m_O2) * 350
Plugging in the molecular masses of H2 and O2, we get:
T = (2/32) * 350
T = 21.875 Kelvin
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Related Questions
Indique el valor de los números n,l,m y s para el último electrón de ₇N.(1 pt c/u) n = _____ l = _____ m = _____ s =_____
Answers
Answer:
n = 2
l = 1
m = 1
s = +1/2
Explanation:
₇N tiene la configuración electrónica;
1s2 2s2 2p3
Esto implica que este último electrón tiene los siguientes números cuánticos;
n = 2
l = 1
m = 1
s = +1/2
Este último electrón estará en un orbital de 2pz como lo muestran los números cuánticos enumerados anteriormente.
the earth’s atmosphere contains about 0.04% (or 400 parts per million) carbon dioxide. although most of the carbon dioxide is in the form 12co2, which is not radioactive, a specific fraction of the total is made up of radioactive 14co2.
Answers
The Earth's atmosphere consists of approximately 0.04% carbon dioxide (CO2), or 400 parts per million (ppm). The majority of this carbon dioxide exists in the form of stable carbon-12 isotope (12CO2), which is not radioactive. However, a small fraction of the total carbon dioxide is composed of the radioactive carbon-14 isotope (14CO2).
Carbon-14 is a radioactive isotope of carbon that is formed in the atmosphere due to interactions between cosmic rays and nitrogen atoms. It is continually produced and naturally decays over time. The concentration of 14CO2 in the atmosphere is relatively low, with an approximate ratio of one 14CO2 molecule for every trillion carbon dioxide molecules.
This radioactive isotope is important in the field of radiocarbon dating, as it allows scientists to determine the age of organic materials by measuring the ratio of 14C to stable carbon isotopes. Organisms constantly exchange carbon dioxide with the atmosphere, and as a result, the concentration of 14CO2 in living organisms remains relatively stable. However, upon death, the intake of 14CO2 ceases, and the isotope decays at a known rate, enabling scientists to estimate the age of the organic material.
It's important to note that while the radioactive fraction of carbon dioxide is present in the atmosphere, its concentration is very low compared to the stable carbon dioxide. The majority of the carbon dioxide in the Earth's atmosphere is non-radioactive and does not pose a significant radiation risk to humans or the environment.
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HELP FAST
H₂S gas is removed from the system at
equilibrium below. How does the
system adjust to reestablish
equilibrium?
NH4HS(s) = NH3(g) + H₂S(g)
A. The reaction shifts to the right (products) and the
concentration of NH3 decreases.
B. The reaction shifts to the left (reactants) and the
concentration of NH3 decreases.
C. The reaction shifts to the right (products) and the
concentration of NH3 increases.
D. The reaction shifts to the left (reactants) and the
concentration of NH3 increases.
Answers
When H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases (option C)
How do i determine where the reaction will shift to?A French scientist (Chatelier) postulated a principle which helps us to understand a chemical system in equilibrium.
The principle states that If a an external constraint such as change in temperature, pressure or concentration is imposed on a system in equilibrium, the equilibrium will shift so as to neutralize the effect.
According to Chatelier's principle a decrease in concentration of the products will favor the forward (right) reaction.
From the above principle, we can conclude that when H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases.
Thus, the correct answer to the question is option C
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A new baby weighs 7.8lb what is it’s mass in kg (453.6g=1lb)?
Answers
Answer:
7.8 pounds is equal to 3.53802049 kilograms.
Explanation:
when methanol (ch3oh) is dissolved in water, the temperature of the mixture drops. what does this indicate?
Answers
This indicates that when methanol is dissolved in water, an endothermic reaction is taking place, as the heat energy of the mixture is used up to break the bonds of the methanol molecules and dissolve them in the water.
When methanol (CH3OH) is dissolved in water, the temperature of the mixture drops. This indicates that the dissolution of methanol in water is exothermic. During the dissolution process, energy is released, which is transferred from the mixture to the surroundings. This leads to a decrease in the temperature of the mixture.
The following equation represents the dissolution of methanol in water: CH3OH (l) + H2O (l) → CH3OH(aq). When the methanol and water molecules interact with each other, hydrogen bonds are formed between them. The hydrogen bonds lead to the release of energy, which is the cause of the temperature drop.
Therefore, when methanol is dissolved in water, the temperature of the mixture drops, indicating that the process is exothermic.
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write about group in chemistry
Answers
Answer:
Explanation:
Symmetry can help resolve many chemistry problems and usually the first step is to determine the symmetry. If we know how to determine the symmetry of small molecules, we can determine symmetry of other targets which we are interested in. Therefore, this module will introduce basic concepts of group theory and after reading this module, you will know how to determine the symmetries of small molecules.
Introduction
Symmetry is very important in chemistry researches and group theory is the tool that is used to determine symmetry. Usually, it is not only the symmetry of molecule but also the symmetries of some local atoms, molecular orbitals, rotations and vibrations of bonds, etc. that are important. For example, if the symmetries of molecular orbital wave functions are known, we can find out information about the binding. Also, by the selection rules that are associated with symmetries, we can explain whether the transition is forbidden or not and also we can predict and interpret the bands we can observe in Infrared or Raman spectrum.
Symmetry operations and symmetry elements are two basic and important concepts in group theory. When we perform an operation to a molecule, if we cannot tell any difference before and after we do the operation, we call this operation a symmetry operation. This means that the molecule seems unchanged before and after a symmetry operation. As Cotton defines it in his book, when we do a symmetry operation to a molecule, every points of the molecule will be in an equivalent position.
Symmetry Elements
For different molecules, there are different kinds of symmetry operations we can perform. To finish a symmetry operation, we may rotate a molecule on a line as an axis, reflect it on a mirror plane, or invert it through a point located in the center. These lines, planes, or points are called symmetry elements. There may be more then one symmetry operations associated with a particular symmetry
Identity E
The molecule does not move and all atoms of the molecule stay at the same place when we apply an identity operation, E, on it. All molecules have the identity operation. Identity operation can also be a combination of different operations when the molecule returns to its original position after these operations are performed.1 This will be demonstrated later.
A buffer is prepared by adding 11.0 g of ammonium chloride (NH4Cl) to 230 mL of 1.00M NH3 solution. Write the net ionic equation for the reaction that occurs when a few drops of nitric acid are added to the buffer.
Answers
A buffer is a solution that can resist changes in pH when small amounts of an acid or base are added to it. A buffer solution is usually made up of a weak acid and its corresponding conjugate base or a weak base and its corresponding conjugate acid.
When a small amount of an acid or base is added to a buffer solution, the buffer components neutralize it, minimizing the change in pH. Ammonia is a weak base and ammonium chloride is its conjugate acid.
They can be used to create a buffer solution. When a small amount of an acid is added to this buffer solution, the buffer components neutralize it. This creates a net ionic equation for the reaction.
Explanation
A buffer solution can be made by mixing a weak acid and its corresponding conjugate base or a weak base and its corresponding conjugate acid. NH3 is a weak base and \(NH4Cl\) is its conjugate acid. When mixed together, they can create a buffer solution.
The equation for the reaction between NH3 and NH4Cl is:
\(NH4Cl + NH3 ⇌ NH4+ + NH2Cl-\)
When a small amount of nitric acid (\(HNO3\)) is added to this buffer solution, it reacts with the ammonia (NH3) to form ammonium nitrate (NH4NO3). This equation can be represented as:
\(HNO3 + NH3 → NH4NO3\)
The net ionic equation for this reaction is:
\(H+ + NH3 → NH4+\)
In this equation, the nitrate ion (\(NO3-\)) is a spectator ion and is not included in the net ionic equation. The nitric acid (\(HNO3\)) donates a proton (H+) to the ammonia (NH3) to form ammonium (\(NH4+\)). The ammonium ion is then available to neutralize any additional acid that may be added to the buffer solution.
In summary, when a small amount of nitric acid is added to a buffer solution made from ammonium chloride and ammonia, the ammonia reacts with the nitric acid to form ammonium nitrate, and the buffer neutralizes the additional acid by forming more ammonium ions.
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Which of the following is not an antioxidant _________
1) Sodium benzoate 2) Sulphur dioxide 3) Sulphite salts 4) Citric acid
Answers
Answer: 1. Sodium Benzoate
Explanation: An anti-oxidant is a substance that can help prevent or stop the damage done by free radicals. Examples include; Sulphur Dioxide, Sulphite Salts, Citric Acid, e.t.c
Sodium benzoate is a pure preservative.
When did pewter have lead?
Answers
At least 2,000 years ago, during the Roman era, pewter was used. The basic ingredients of old pewter were 70% tin and 30% lead. This form of pewter, also referred to as black metal, rapidly lost its lead when exposed to acidic foods.
Pewter stopped using lead when?Older pewters with a higher lead concentration are heavier, tarnish more quickly, and turn a darker shade of silver-grey with time. In 1974, BS5140, which was strengthened in 1994 by the European directive BSEN611, eliminated lead from the composition.
Lead content in antique pewter?Modern pewter is lead-free and safe to use for eating and drinking, however older antique pewter objects may have lead residues.
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what provides great Britan with a moderate climate
Answers
Which of the following atoms has the largest radius?
a. lithium
b. lead
C. cesium
d. fluorine
e. carbon
Answers
Explanation:
first one, a. lithium. it's the largest
Aside from color, how are light silicates and dark silicates different, and why?Light silicates have a higher specific gravity because they lack iron and magnesium, whereas dark silicates have a lower specific gravity due to their high iron and magnesium content. Light silicates have a higher specific gravity Due to their high iron and magnesium content, whereas dark silicates have a lower specific gravity because they lack iron and magnesium. Light silicates have a higher specific gravity because they have high iron content; dark silicates have a lower specific gravity due to their magnesium content.Light silicates have a lower specific gravity because they lack iron and magnesium; dark silicates have a higher specific gravity because they have high iron and magnesium content. Light silicates have a lower specific gravity because they have high iron and magnesium content, whereas dark silicates have a higher specific gravity because they lack iron and magnesium.
Answers
Because they include a lot of iron and magnesium, light silicates have a lower specific gravity than dark silicates, which have a greater specific gravity.
What other characteristics of bright and dark coloured silicates are different?This difference is mostly caused by the amounts of iron and magnesium that are present; light silicates have significantly less iron and magnesium and, in comparison to dark silicates, comparatively more potassium, aluminium, and sodium.
Why are dark and light silicates distinct from one another?Because they include a lot of iron and magnesium, light silicates have a lower specific gravity than dark silicates, which have a greater specific gravity.
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hing
Math
Assessment
m/science
Analytics
Language arts
m grade F.5 Compare physical and chemical changes PPU
Science
What do these two changes have in common?
photosynthesis
a penny tarnishing
Select all that apply.
Both are only physical changes.
Both are caused by heating.
Submit
Social studies
Both are chemical changes.
Both are caused by cooling.
Work it out
Re-
Answers
Photosynthesis and penny tarnishing is both are chemical changes.
Photosynthesis is a chemical change. The process of photosynthesis is the process of making energy in plants that utilize sunlight, air and carbon dioxide into energy.
Tarnishing is considered a chemical change. A change in color indicates that a new chemical has been created. The copper on the surface of the coin combines with oxygen in the air to form another substance, copper oxide.
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What is the three-dimensional shape of the molecule with this Lewis structure?
A. Bent
B. Tetrahedral
C. Trigonal planar
D. Trigonal pyramidal
Answers
Answer:
C. Trigonal planar
Explanation:
Hello!
In this case, according to the VSEPR theory, it is possible to realize that this molecule has three bonded atoms to the main carbon, one oxygen and two hydrogens. In addition, the aforementioned central carbon atom does not have any lone pairs, therefore, the molecular geometry for three bonded atoms and zero lone pairs would be trigonal planar.
Best regards!
i need help with d and e
Answers
Answer:
D: False
E: Ethane
Explanation:
if loratadine and pseudoephedrine sulfate are put into a LLE system. what would be the best organic phases and aqueous phase to separate them?
Answers
In a liquid-liquid extraction (LLE) system with loratadine and pseudoephedrine sulfate, the choice of organic and aqueous phases is crucial for efficient separation.
Loratadine is a non-polar compound, while pseudoephedrine sulfate is more polar due to the presence of a sulfate group. To achieve effective separation, we need to choose a suitable organic phase and aqueous phase.
For the organic phase, a non-polar solvent such as diethyl ether, ethyl acetate, or chloroform can be used. These solvents have good solubility for loratadine. The non-polar organic phase will extract loratadine from the mixture, allowing for separation from the aqueous phase.
As for the aqueous phase, we need to choose a polar solvent that will selectively extract pseudoephedrine sulfate. Aqueous solutions of acids like hydrochloric acid (HCl) or sulfuric acid (H2SO4) can be used. The acidic conditions protonate the pseudoephedrine sulfate, making it more soluble in the aqueous phase.
To perform the extraction, the mixture of loratadine and pseudoephedrine sulfate is added to the LLE system consisting of the organic phase (non-polar solvent) and the aqueous phase (acidic solution). The mixture is then vigorously shaken to ensure thorough mixing and extraction.
After shaking, the phases are allowed to separate, with the more dense aqueous phase settling at the bottom and the less dense organic phase on top. The layers can be carefully separated, and each phase can be further processed to isolate the desired compounds.
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What's the fomular for this?
Answers
Answer:
1000 km/s is the formula for density of liquid
. once you have calculated the correct molarity of the unknown acid, use rice table to find the initial ph of the solution. did this match with the actual ph you started with in your titration curve?
Answers
Using the calculated molarity of the unknown acid, you can use the Rice table to determine the initial pH of the solution.
The rice table is a tool that is used to determine the unknown variables when calculating equilibrium concentrations. When titrating an unknown acid, the molarity of the solution is determined by using stoichiometric ratios. Once the molarity of the unknown acid is known, the Rice table can be used to determine the initial pH of the solution.
This is achieved by setting up a table that shows the initial concentration of each species, the change in concentration, and the equilibrium concentration. By using the equilibrium concentrations, it is possible to determine the equilibrium constant and calculate the pH of the solution.
In conclusion, if the initial pH determined using the Rice table matches the actual pH of the titration curve, it confirms that the calculation of the molarity was correct. If the pH values do not match, it is an indication of an error in the calculations, and a recalculation is necessary.
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Which circuit is a series circuit? A. A Circuit has battery at top connected to three components across each other's leads B. Three components connected across each other to a common battery C. Two batteries connected to one component and switch across each other's leads D. A Battery connected to two components such that only one path for current to flow.
Answers
Answer:
THE CORRECT ANSWER IS D
Explanation:
A, B, and C are incorrect. I took the test so I know. Hope this helps
Help for Honor chem homework
Answers
Answer:
$160.80
$40.20 for 12 beakers = $3.35 for 1 beaker
48 beakers = $160.80
ill attach a picture
Answers
Answer:
35.50
Explanation:
There are two stable isotopes, 35Cl (75.77%) and 37Cl (24.23%), giving chlorine a standard atomic weight of 35.45
NO LINKSSSS PLEASE!!!
The solubility of oxygen gas in water is increased by which of the procedures shown below?
Select one:
a. Decreasing the temperature of the solution.
b. Decreasing the pressure on the solution.
c. Increasing the temperature of the solution.
d. Stirring the solution.
Answers
Answer: b
Explanation:
ammonium perchlorate nh4clo4 is the solid rocket fuel that was used by the u.s. space shuttle and is used in the space launch system (sls) of the artemis rocket. it reacts with itself to produce nitrogen gas n2, chlorine gas cl2, oxygen gas o2, water h2o, and a great deal of energy. what mass of oxygen gas is produced by the reaction of 6.54g of ammonium perchlorate? round your answer to 3 significant digits.
Answers
The amount of oxygen produced by the reaction of 6.54g of ammonium perchlorate is 2.228g.
The chemical reaction for this will be:
4NH4ClO4 → 5O2 + 6H2O + 2N2 + 4HCl
We know:
'6.54' grams is mass of ammonium perchlorate and '117.49' g/mol is molar mass of ammonium perchlorate
Now, we can calculate moles by:
Moles NH4ClO4 = mass NH4ClO4 / molar mass NH4ClO4
Moles NH4ClO4 = 6.54 grams / 117.49 g/mol
this give 0.0557 moles of NH4ClO4
After this we will calculate the moles of O2 produced similarly:
For 4 moles of ammonium perchlorate consumed, 5 moles of O2 is produced, in addition to 6 moles of H2O, 2 moles of N2 and 4 moles of HCl.
For 0.0696 moles NH4ClO4; we get 5/4 * 0.0557 = 0.0696 moles of O2
And Finally we can calculate the mass of oxygen produced:
Mass of oxygen = moles of O2 * molar mass of O2
Mass of oxygen = 0.0696 moles * 32 g/mol
Mass of oxygen = 2.228 grams
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How many hydrogen atoms are present in 4 mg of aspartame?
Answers
\(molecular \: formula \: = C_{14}H_{18}N_{2}O_{5} \\ \)
\(molar \: mass = 294\: g.mol {}^{ - 1} \)
\(n_{aspartame} = \frac{mass}{molar \: mass} = \frac{4 \times 10 {}^{ - 3} }{294} = 1.36055 \times 10 {}^{ - 5} moles \\ \)
\(1 \: mole \: asp = 18 \: moles \: hydrogen \\ n_{hydrogen} = 18 \times n_{aspartame}\)
\(atoms_{hydrogen} = n_{hydrogen} \times 6.022 \times 10 {}^{23} \\ atoms_{hydrogen} = 0.0002448979591 \times 6.022 \times 10 {}^{23} \\ atoms_{hydrogen} = 1.4747755 \times 10 {}^{20} atoms\)
calculate the rf value for a spot in a chromatography experiment if the solvent moved 13.1 cm and the spot moved 9.5 cm from the origin.
Answers
The rf value for a spot in a chromatography experiment if the solvent moved 13.1 cm and the spot moved 9.5 cm from the origin is 0.73.
What is chromatography ?
Separating ingredients in a mixture using chromatography is a procedure. The mixture is dissolved in the mobile phase, which starts the process off, and then transports it through the stationary phase, which is the final phase.
What is experiment ?
A scientific experiment is a test carried out to ascertain what occurs to a subject under a given set of circumstances.
Therefore, rf value for a spot in a chromatography experiment if the solvent moved 13.1 cm and the spot moved 9.5 cm from the origin is 0.73.
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PLEASE HELP!! The graph below shows the motion of a car leaving the airport with segments A, B, and C labeled on their journey.
Identify the line segment that would represent a negative acceleration. Explain your answer.
Answers
Answer: Segment B
Explanation:
On a graph, a line traveling upwards from left to right is considered positive. A line traveling downwards from left to right is considered negative. A line neither traveling upwards or downwards is neutral. Based on this, we can see that segment B is traveling downwards, so it would represent a negative acceleration.
the first neuron in a chain is a primary neuron. the dendrites of this neuron are part of the receptor that detects a specific stimulus. the cell bodies of these neurons reside in the of spinal nerves. the axon projects to a secondary neuron within the cns. the secondary neuron is . the cell body of this neuron resides within either the posterior horn of the spinal cord or a . the axon of a secondary neuron projects either to the thalamus for sensations or to the cerebellum for proprioception. the secondary neuron to the thalamus synapses with the tertiary neuron, the third neuron in the chain. the tertiary neuron is also an interneuron, and its cell body resides within the . the axon of the tertiary neuron projects to the primary somatosensory cortex of the parietal lobe.
Answers
The first neuron in a chain is a primary neuron. The dendrites of this sensory neuron are part of the receptor that detects a specific stimulus.
The cell bodies of these neurons reside in the posterior root ganglia of spinal nerves
The axon projects to a secondary neuron within the CNS. - The secondary neuron is an interneuron
What are Dendrites?Dendrites are appendages that receive communications from other cells. They have a tree-like structure, with projections that are stimulated by other neurons and conduct electrochemical charge to the cell body (or, more rarely, directly to the axons). Axons carry messages through your body's systems, and dendrites receive and process those messages.
A neuron may have only one axon, but more than one set of dendrites. A primary neuron is the first neuron in a chain. This sensory neuron's dendrites are part of the receptor that detects a specific stimulus. The cell bodies of these neurons are found in the spinal nerves' posterior root ganglia.
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A 4.2 L sample of a gas was collected over wa- ter on a day when the temperature was 24°C and the barometric pressure was 706 torr. The dry sample of gas had a mass of 5.6 grams. What is the mass of three moles of the dry gas? At 24°C the vapor pressure of water is 22 torr. Answer in units of g.
Answers
If the dry sample of gas had a mass of 5.6 grams, the mass of three moles of the dry gas is 26.58 g.
We have the values:
The volume of gas, V = 4.2 L
Barometric pressure, P = 706 torr
Temperature, T = 24°C = 297.15 K
Mass of dry gas, m = 5.6 g
Molar mass of the gas, M = ?
Vapor pressure of water at 24°C, Pᵥ = 22 torr
We can find the number of moles of the gas as follows;
PV = nRTn = PV / RTn = (P - Pᵥ) V / RT
Substituting the values,
n = (706 - 22) torr x 4.2 L / (0.0821 L atm / K mol x 297.15 K)
n = 0.631 mol
The mass of three moles of the gas is obtained by multiplying the number of moles by its molar mass as follows;
m = n x M
M = m / n
M = 5.6 g / 0.631
M = 8.86 g/mol
The mass of three moles of the dry gas is;
m = 3 x 8.86 gm
= 26.58 g
Therefore, the mass of three moles of the dry gas is 26.58 g.
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What is a chemical symbol? Give an example.
Answers
Answer:
zero two is bae
Explanation:
OMG PLS ANSWER IM USING SO MANY P OINTS I SWEAR I NEED
Answers
Answer:
1)They have different densities.
2) The molecules are packed differently
Explanation:
Oil and Water have different densities The first reason that water and oil don’t mix is because their molecules are packed differently. The molecules of water are packed very densely. (Would be good to show water molecules packed densely) In one glass of water, there are more molecules than the number of known stars in the universe!
Answer:
diff densities
Explanation: