a hydrogen balloon is at 25oc, 1.00 atm and has a volume of 1.00 l. how many grams of argon gas must be added to the hydrogen balloon to achieve a volume of 3.84 l at constant temperature and pressure? group of answer choices 6.27 g 7.91 g 93.9 g 4.64 g none of these
Answers
4.76 grams of argon gas must be added to the hydrogen balloon to achieve a volume of 3.84 L at constant temperature and pressure.
To take care of this issue, we really want to utilize the ideal gas regulation, which relates the tension, volume, temperature, and number of moles of a gas. The ideal gas regulation can be composed as:
PV = nRT
where P is the strain, V is the volume, n is the quantity of moles, R is the gas consistent, and T is the temperature.
We can initially work out the quantity of moles of hydrogen in the inflatable utilizing the best gas regulation:
n(\(H_{2}\)) = PV/RT
n(\(H_{2}\\\)) = (1.00 atm x 1.00 L)/(0.0821 L·atm/mol·K x 298 K)
n(\(H2\)) = 0.0404 mol
To accomplish a last volume of 3.84 L, the complete number of moles of gas should stay consistent. In this manner, we want to work out the quantity of moles of argon that should be added to the inflatable:
n(Ar) = n(final) - n(\(H2\\\))
n(Ar) = (1.00 atm x 3.84 L)/(0.0821 L·atm/mol·K x 298 K) - 0.0404 mol
n(Ar) = 0.119 mol
The mass of argon that should be added can be determined utilizing its molar mass:
mass(Ar) = n(Ar) x molar mass(Ar)
mass(Ar) = 0.119 mol x 39.95 g/mol
mass(Ar) = 4.76 g
Thusly, we really want to add 4.76 grams of argon gas to the hydrogen inflatable to accomplish a volume of 3.84 L at steady temperature and tension. None of the offered response decisions matches this outcome, so the right response is "none of these."
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The complete question is:
A hydrogen balloon is at 25 degree C, 1.00 atm and has a volume of 1.00 L. How many grams of argon gas must be added to the hydrogen balloon is achieve a volume of 3? at construct temperature and pressure? none of these 6.18 g 4.54 g 7.81 g 92.4 g A compressed gas cylinder, at 137 atm and 23 degree C, is in a room where a line occurs. The line the temperature of the gas to 475 degree C. What is the line pressure is the cylinder? 3.30 atm 3.46 times \(10^3\) atm 2.16 atm 85.4 atm 2.83 times \(10^3\) atm A gas occupies 30.3 L at 2.00 atm pressure and 27 degree C. How many of gas are present in the sample? 2.46 mol 27.4 mol 1.23 mol 4.86 mol 3.96 mol What volume of HC
Related Questions
Explain why solids and liquids are difficult to compress
whereas gases can easily be compressed.
Answers
Answer:
Because they take up a certain amount of volume because there is no space in-between the particles, a gases can be compressed because there is alot of space in-between each particle
Explanation:
3)
:NEN:
How many nonbonding electrons are on each nitrogen atom?
A)
0
B)
2
c)
4
D)
6
4)
-))
Answers
Answer:
your answer is C
Explanation:
The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.
In one key scene in The Scarlet Letter, the Reverend Dimmesdale's publicly confesses to his part in a grave sin as he stands upon the town scaffold with Hester and Pearl by his side. What critical role does this scene play in the novel's plot?
It is the climax.
It is the falling action.
It is the rising action.
It is the initiating event
Answers
The critical role that the key scene in The Scarlet Letter, where the Reverend Dimmesdale publicly confesses to his part in a grave sin as he stands upon the town scaffold with Hester and Pearl by his side plays in the novel's plot is that it is the climax of the novel
A climax is the turning point or highest point of interest in a story, in which the outcome of the conflict is finally revealed. In The Scarlet Letter, the climax is when Dimmesdale publicly confesses to his sin, which brings the novel's primary conflict to a close.
Hence, it is clear that the key scene in The Scarlet Letter where Dimmesdale confesses is the climax of the novel.
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Q. What phase change occurs at letter A?
Answers
Answer:
Where is the picture? Can't answer without it.
What products are formed when a hydrocarbon combusts?
A. Hydrogen and oxygen
B. Carbon dioxide and water
C. Carbon dioxide and hydrogen
D. Water and hydrogen
Answers
Answer:
b
Explanation:
The products are formed when a hydrocarbon combusts are carbon dioxide and water and the correct option is option B.
Combustion is a chemical reaction that occurs when a fuel combines with an oxidizing agent, typically oxygen, resulting in the release of heat and the formation of products. It is an exothermic reaction, meaning it releases energy in the form of heat and light.
During combustion, the fuel undergoes rapid oxidation, breaking its chemical bonds and forming new bonds with oxygen. Common examples of combustion include burning of wood, gasoline, natural gas, and other hydrocarbon fuels.
The reaction is often accompanied by the production of flames and the release of carbon dioxide and water vapor.
Thus, the ideal selection is option B.
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Estimate the fractions of MgO solid solution and MgAl2O4 solid solution present at 1700oC in a binary MgO-Al2O3 ceramic with a composition of 40 wt% Al2O3.
Answers
At 1700°C, the binary MgO-Al2O3 ceramic with a composition of 40 wt% Al2O3 is likely to contain a significant amount of solid solutions.
The exact fractions of MgO solid solution and MgAl2O4 solid solution present can be estimated based on the phase diagram of the system. According to the phase diagram, at 1700°C, the binary system is likely to be in a region where MgAl2O4 is the dominant phase. However, the exact fraction of MgAl2O4 and MgO solid solutions present would depend on the cooling rate and processing conditions. In general, higher cooling rates tend to favor the formation of solid solutions, while slower cooling rates promote the growth of pure phases.
At 1700°C in a binary MgO-Al2O3 ceramic with a composition of 40 wt% Al2O3, we can estimate the fractions of MgO and MgAl2O4 solid solutions using the lever rule. The lever rule considers the mass balance and the phase diagram of the system. According to the MgO-Al2O3 phase diagram, the eutectic composition at 1700°C is around 30 wt% Al2O3, which is mostly composed of MgO solid solution, while MgAl2O4 (spinel) solid solution forms above this composition.
Considering the given composition of 40 wt% Al2O3, we can estimate that there is roughly 70 wt% MgO solid solution and 30 wt% MgAl2O4 solid solution present in the ceramic. However, for precise calculations, a more detailed analysis of the phase diagram is needed.
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Dry hydrogen chloride was bubbled in methylbenzene and sodium carbonate added . Explain this observation.
Answers
Answer:
No observable change, unless dry hydrogen Chloride reacted in presence of a peroxide (ROOR)
how many valence electrons do the alkaline earth metals have?
Answers
The following statements were taken from the procedures of four
different investigations. The statement from which investigation is an
example of repetition?
Answers
Answer: D. Investigation 4
Answer:
Investigation D
Explanation:
~I will give the brainliest~
How does temperature affect the rate constant for a reaction?
A. increasing temperature exponentially increases the rate constant
B. increasing temperature linearly increases the rate constant
C. increasing temperature exponentially decreases the rate constant
D. increasing temperature linearly decreases the rate constant
E. temperature has no effect on the rate constant
Answers
Calculate the equilibrium constant for each of the reactions at 25 ∘C.
Part A. 2Cr3+(aq)+3Sn(s)→2Cr(s)+3Sn2+(aq)
Express your answer using two significant figures.
Part B. O2(g)+2H2O(l)+2Sn2+(aq)→4OH−(aq)+2Sn4+(aq)
Express your answer using two significant figures.
Part C. 2Cr3+(aq)+3Ni(s)→2Cr(s)+3Ni2+(aq)
Express your answer using two significant figures.
Answers
Part A: The equilibrium constant for the reaction 2Cr³⁺(aq) + 3Sn(s) → 2Cr(s) + 3Sn²⁺(aq) at 25 °C is approximately 1.3 × 10¹¹.
Part B: The equilibrium constant for the reaction O₂(g) + 2H₂O(l) + 2Sn²⁺(aq) → 4OH⁻(aq) + 2Sn⁴⁺(aq) at 25 °C is approximately 7.9 × 10³¹.
Part C: The equilibrium constant for the reaction 2Cr³⁺(aq) + 3Ni(s) → 2Cr(s) + 3Ni2+(aq) at 25 °C is approximately 6.6 × 10⁻²⁰.
Part A: The equilibrium constant, K, is determined by the concentrations of the products and reactants at equilibrium. Since all the substances in the reaction are solids except for the aqueous ions, their concentrations remain constant and are excluded from the equilibrium expression. Therefore, the equilibrium constant can be expressed as K = [Cr]²[Sn²⁺]³, where [Cr] and [Sn²⁺] represent the concentrations of Cr and Sn²⁺ ions, respectively. Given that the reaction involves ions, we can assume their concentrations to be 1 M (since they are not explicitly provided). Substituting these values into the equilibrium expression yields K = (1²)(1³) = 1. Therefore, the equilibrium constant for the given reaction at 25 °C is approximately 1.3 × 10¹¹.
Part B: Similar to Part A, the concentrations of water and solids remain constant, so they are excluded from the equilibrium expression. Thus, the equilibrium constant can be expressed as K = [OH⁻]⁴[Sn⁴⁺]², where [OH⁻] and [Sn⁴⁺] represent the concentrations of OH⁻ and Sn⁴⁺ ions, respectively. Assuming their concentrations to be 1 M (since they are not given), we substitute these values into the equilibrium expression to obtain K = (1⁴)(1²) = 1. Therefore, the equilibrium constant for the given reaction at 25 °C is approximately 7.9 × 10³¹.
Part C: Again, since Ni is a solid, its concentration remains constant and is excluded from the equilibrium expression. Therefore, the equilibrium constant can be expressed as K = [Cr]²[Ni²⁺]³, where [Cr] and [Ni²⁺] represent the concentrations of Cr and Ni²⁺ ions, respectively. Given that the reaction involves ions, we assume their concentrations to be 1 M (as they are not explicitly provided). Substituting these values into the equilibrium expression yields K = (1²)(1³) = 1. Therefore, the equilibrium constant for the given reaction at 25 °C is approximately 6.6 × 10⁻²⁰.
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Which electromagnetic wave transfers the most energy?
A) infrared
B) microwaves
C) radio waves
D) X-rays
Answers
The answer is X-rays because,
X-rays are classified as the electromagnetic spectrum's second-to-last category. These rays can have wavelengths that are as small as an atom and a very high energy frequency.
The X-ray wavelength depends on the object's temperature, with shorter wavelengths produced by hotter objects. The use of X-rays in medical imaging is well-known; after passing through a person's body, the waves create shadows of things on X-ray films.
When the human body is exposed to X-ray waves for an extended period of time, danger also results. For this reason, X-ray technicians and patients who are undergoing medical X-rays both don protective clothing and leave the room while the images are being taken.
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Identify the group number and generic outer electron configuration for a neutral main‑group element with the following two Lewis dot symbols.
X with 1 dot on the top, bottom and right
X with 1 dot on all sides
Answers
Answer: Answer to #1 is 3A and ns2np1
Answer to #2 is 4A and ns2np2
Explanation:Group number is the number of valance electrons and generic outer electron configuration has to add up to equal the number of valance electrons
The element in the first diagram is in group 13 while the element in the second diagram is in group 14.
The Lewis structure of an atom of an element is a representation of the number of valence electrons on the outermost shell of the atom of that element. Every group of elements have a generic electron configuration which represents the number of valence electrons contained by atoms of elements in that group.
In the first diagram, the element X belongs to group 3A(13) and has a generic outer electron configuration, ns2np1. In the second diagram, the element X is in group 4A(14) and has outer electron configuration ns2np2.
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What is the mass of 6. 02 x 10^22 molecules of fluorine gas at stop
Answers
Answer:
3.7996 g
Explanation:
From the number of molecules we can find the number of moles of Fluorine gas (F2) and multiply by Fluorine Gas' molecular weight. Fluorine gas is F2,
F = 18.998g/mol.
F2 (g) = 18.998*2 =37.996g F2(g)/mol
1 mol = 6.02 x 10^23 molecules
\(\frac{6.02*10^{22} molecules}{6.02*10^{23}molecules / mole }\\\\ = 0.1 mole\)
0.1 mol x 37.996g F2 (g) / mol
3.7996 g F2
Which term describes the composition of matter shown in Figure E?
Answers
Answer:
Figure E is a compound
Explanation:
Compounds are constructed of 2 different elements
which step must happen first in protein production?
Answers
Transcription, which involves the unfolding of DNA and the creation of an mRNA strand, is the first stage in the procedure. The cell's nucleus is where this action takes place.
The amino acids are introduced into the expanding protein chain in the correct order thanks to the RNA template that DNA produces. Every specific amino acid is brought to the RNA for incorporation by a particular transfer RNA (tRNA), which is attached to it.
In the ribosome, the process of assembling amino acids occurs. This structure consists of two subunits containing ribosomal RNA that enclose the messenger RNA and catalyze the formation of the amide linkages in the developing protein, a process known as translation.
The two subunits split apart and release the finished protein chain after protein synthesis is finished. Protein synthesis is a fairly quick process. About 3-5 amino acids are added to the lengthening peptide chain every second.
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which of the following statements is/are true regarding acid-base indicators? (select all that apply.) when choosing an indicator for a titration, the indicator end point (where the color changes) and the titration equivalence point should be as close as possible. there is a wider choice of suitable indicators for titrating weak acids with a strong base ver
Answers
The Acid-base indicators are substances that change color depending on the pH of the solution they are in. - The first statement is true. When choosing an indicator for a titration, it is important to choose one whose end point (where the color changes) is as close as possible to the titration.
The equivalence point, which is the point at which the acid and base have completely reacted with each other. This ensures the most accurate results. - The second statement is also true. There is indeed a wider choice of suitable indicators for titrating weak acids with a strong base compared to strong acids with a strong base. This is because strong acids will have a much lower pH than weak acids, which means that the indicator must be more sensitive to changes in pH in order to accurately determine the end point of the titration. I hope this helps and if you have any other questions, feel free to ask. Also, if you need homework help or have any questions related to education, you can check out Brainly - Answer Platform, which is a great resource for students to get answers to their academic questions.
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Can anybody help me with this?
Answers
The correct order of the given elements above in their increasing atomic radii are as follows:
Phosphorus CobaltRutheniumOsmiumGalliumWhat is meant by the atomic radius of an element?The atomic radius of an element is one periodic properties of elements which describes the total distance between the center of the nucleus of an element to the outermost shell of an electron.
From the task given above, the atomic radii values of the elements in the problem above are: Phosphorus ( 98pm ), Cobalt ( 152pm ), Ruthenium ( 178pm ), Osmium ( 185pm ) and finally Gallium which is 187pm.
That being said, below are some few examples of periodicities which is seen in elements in the periodic table:
Melting and boiling pointIonization energyElectron affinityElectronegativityElectrical and thermal conductivityIonic sizeIonic radiusIn conclusion, the atomic radius and atomic size are both periodic properties of elements.
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chemical analysis of the residues of diazinon suggests that it may persist longer on
Answers
Chemical analysis of the residues of diazinon suggests that it may persist longer on certain surfaces and in the environment.
Diazinon is an organophosphate insecticide that has been widely used for agricultural and residential purposes. It is known to be highly toxic to many organisms, including humans, and can have long-lasting effects on the environment. Chemical analysis of the residues of diazinon has shown that it can persist longer on certain surfaces, such as soil and plant material, due to its low water solubility and tendency to bind to organic matter. Additionally, diazinon has been found to persist in the environment for extended periods of time due to its resistance to degradation by sunlight and microbial activity.
In conclusion, the chemical analysis of the residues of diazinon indicates that it can persist longer on certain surfaces and in the environment. This highlights the need for proper management and disposal of diazinon and other similar pesticides to prevent harmful effects on human health and the environment.
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Question 7 of 25
The diagram shows the direction trade winds blow below and above the
equator. What causes the trade winds to move at an angle rather than straight
toward the equator?
for Easterlies
Answers
Answer:
A. The Coriolis Effect bends them
Explanation:
The Coriolis Effect is a force that causes objects and other things that are not attached to the ground and which are moving over a large distance around the Earth such as the trade winds or air planes, to take an apparent curved path in their motion rather than moving in a straight line, due mainly to the rotation of the Earth
The Coriolis Effect is named after French mathematical physicist Gaspard-Gustave de Coriolis
give the systematic name for the compound mg(no3)2
Answers
The systematic name for the compound Mg(NO₃)₂ is magnesium nitrate.
If we further describe the magnesium nitrate, it is found to consists of one magnesium ion (Mg₂₊) and two nitrate ions (NO₃₋) held together by ionic bonds.
Magnesium, with a ₂₊ charge, forms a cation, while nitrate, with a ₁₋ charge, forms an anion.
The compound is formed by the combination of these ions in a 1:2 ratio to maintain electrical neutrality.
Magnesium nitrate is a crystalline solid that is highly soluble in water.
It is commonly used in various applications, including fertilizers, pyrotechnics, and as a component in laboratory reagents.
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How many moles are in 6.95 x 10^24 atoms of sodium?
Answers
Answer:
11.5
Explanation:
1 mole of Na has 6.022 × 10^23
so 6.95 x 10^24 / 6.022 × 10^23 = 11.5 moles
What is the relationship between dipole moment and the distance between the charges?.
Answers
The relationship between dipole moment and the distance between the charges is the dipole moment is directly proportional to the distance between the charges.
The dipole moment is equal to the product of the magnitude of the charges and the distance between the charges. the expression for the dipole moment is given as follows:
dipole moment = charge × distance of charges
u = Q × r
so, the the distance between the charges is directly proportional to the dipole moment . if the distance between the charges increases the dipole moment is also increases. if the distance between the charges decreases the dipole moment also decreases.
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A compound has a percent composition of 15.24% sodium (molar mass = 22.99
g/mol), 52.95% bromine (molar mass = 79.90 g/mol), and 31.81% oxygen (molar
mass = 16.00 g/mol). Assuming that the mass of the compound is 100 g, what is
the compound's empirical formula?
Show all your work. Please use correct formatting for subscripts and exponents. The math for-
Answers
The empirical formula of the compound obtained from the question given is NaBrO₃
Data obtained from the question Sodium (Na) = 15.24%Bromine (Br) = 52.95%Oxygen (O) = 31.81%Empirical formula =? How to determine the empirical formulaThe empirical formula of the compound can be obtained as illustrated below:
Divide by their molar mass
Na = 15.24 / 22.99 = 0.663
Br = 52.95 / 79.90 = 0.663
O = 31.81 / 16 = 1.988
Divide by the smallest
Na = 0.663 / 0.663 = 1
Br = 0.663 / 0.663 = 1
O = 1.988 / 0.663 = 3
Thus, the empirical formula of the compound is NaBrO₃
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Calculate the number of moles of Au atoms present in 1 gram of gold. How many atoms of Au are there in one gram? How many moles of protons? How many protons?
Help me (T__T)
Answers
0.03058 X 10^23 atoms of Au are there in one gram gold.
How many moles of atoms make up a gram?
The quantity of atoms or molecules per gram of atomic weight is known as Avogadro's number, which is 6.022 1023/mole. One mole of hydrogen comprises 6.022 1023 hydrogen atoms for one gram of hydrogen with an atomic weight of one gram.
The ratio of a substance's given mass in a chemical reaction to the mass of one mole of that material is the number of moles of that substance.
Gold's atomic weight (Au) is 196.97.
The Avogadro number is 6.023 x 10^23.
1 gram of gold is equal to (1/196.97)mole, or 0.005 mole.
3.058 X 1021 (0.005 mol X 6.023 X 10^23) = 0.03058 X 10^23 atoms.
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Susana heats up a sample of red crystals. While the sample is being heated,a gas is released and a blue powder is left after heating. Is the sample of red crystals an element or compound?
Answers
Answer & Explanation:
Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.
Answer:
Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.
Explanation
Sample response form Edg
Harry uses a sling psychrometer to measure relative humidity near his school. The dry bulb temperature reads 58°F, and the wet bulb reads 45°F. At the same time, his cousin Roberta uses her sling psychrometer to measure the relative humidity near her house. The dry bulb temperature reads 58°F, and the wet bulb reads 50°F. What can you conclude from the values?
A.
The relative humidity is higher at Harry’s school than at Roberta’s house.
B.
The relative humidity is higher at Roberta’s house than at Harry’s school.
C.
The relative humidity is the same at Harry’s school and Roberta’s house.
D.
The relative humidity is 45% at Harry’s school and 50% at Roberta’s house.
Answers
Answer:
A.The relative humidity is higher at Harry’s school than at Roberta’s house.
Explanation:
Check using the Relative Humidity Table
Answer:
Option B) The relative humidity is higher at Roberta’s house than at Harry’s school.
Explanation:
got 100% on test
Mg + 2HCl --> MgCl2 + H2(g)
Assuming STP, how many moles of hydrogen gas did Carl and his partner collect if they collected 5. 6L?
Curious Carl and his lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid. They observed bubbles being produced and did a variety of tests to identify the escaping gas; it proved to be hydrogen. The reaction is represented by the following equation.
A) 0. 250 moles
B) 2. 78 moles
C) 5. 60 moles
D) 11. 2 moles
Answers
5.60 moles of hydrogen gas did Carl and his partner collect if they collected 5. 6L.
Give a brief account on Moles ?The mole, also called Avogadro's number, is a unit of measurement used in chemistry to express the amount of matter. It is defined as the number of entities (atoms, molecules, ions, etc.) in a given sample of matter. The number of mole entities is known as Avogadro's number and is approximately 6,022 x 10²³. Moles can also be used to represent the number of units of matter in a chemical reaction. For example, the equilibrium equation for the reaction of magnesium and hydrochloric acid is Mg + 2HCl → MgCl₂ + H₂. This equation shows that for every mole of magnesium, 2 moles of hydrochloric acid are required to produce 1 mole of magnesium chloride and 1 mole of hydrogen gas.
In summary, a mole is a unit of measurement used in chemistry to describe the amount of substance. It is defined as the number of units in a particular sample of matter and is known as Avogadro's number. It can be used to convert between the mass and number of units of matter, and to describe the number of units of matter in chemical reactions.
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A concentration cell is constructed using two NI electrodes with Ni2 concentration of 1. 0 m and 1. 0 x 10^-4 m in the two half-cells. Calculate the potential of the cell if the reaction is spontaneous
Answers
The potential of the concentration cell is 0.1182 V when the reaction is spontaneous.
What is Concentration Cell?An electrolytic cell that contains two half cells with the same electrodes but with different concentrations is known as a concentration cell.
What is Nernst Equation?Nernst Equation helps in determining the cell potential under the non-standard conditions that are at any known temperature, pressure, and concentration. It is given by
\(E = E^o - \frac{2.303RT}{F} log Q\)
At T = 298 K,
\(E = E^o - \frac{0.0591}{n} logQ\)
For Ni concentration cell, anode and cathode are the same and thus E° is zero
At anode,
\(Ni (s)\rightarrow Ni^2^+ + 2e^-\)
At Cathode,
\(Ni^2^+ + 2e^-\rightarrow Ni (s)\)
No of moles of electrons, n = 2
Then, the potential of the cell is given by
\(E=- \frac{0.0591}{n} logQ\)
\(Q = \frac{[diluted Ni]}{[concentrated Ni]}\)
diluted Ni = 1 x 10⁻⁴ M and concentrated Ni = 1 M
\(E = \frac{-0.059}{2} log\frac{ 10^-^4}{1}\\ = \frac{-0.059}{2} \times -4 log10\)
log(10) = 1
E = 0.1182 V
Hence, the potential of the cell is 0.1182 V.
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Which properties describe all matter?
a
being able to be easily measured
b
being able to be seen in nature
c
having mass and taking up space
d
having energy and temperature
Answers
Answer to the question : D.
Answer:
my answer is C. having mass and taking space