the equilibrium constant for the chemical equation n2(g) 3h2(g)↽−−⇀2nh3(g) is p=0.286 at 257 ∘c. calculate the value of c for the reaction at 257 ∘c.
Answers
The value of C for the reaction at 257 °C is [NH₃] = 1.152 mol/L.
How to calculate value of c with given equilibrium constant?The equilibrium constant (Kc) for the reaction is given as:
Kc = [NH₃]²/([N₂][H₂]³)
where [NH₃], [N₂], and [H₂] are the molar concentrations of NH₃, N₂, and H₂ at equilibrium, respectively.
We are given that Kc = 0.286 at 257 °C.
To find the value of C for the reaction at 257 °C, we need to know the molar concentrations of the reactants and products at equilibrium.
Let's assume that the initial molar concentration of N₂ is x mol/L. Then, the initial molar concentration of H₂ is 3x mol/L (since the stoichiometric coefficient of H₂ is 3 in the balanced equation), and the initial molar concentration of NH₃ is 0 mol/L.
At equilibrium, let the molar concentration of NH₃ be y mol/L. Then, the molar concentration of N₂ will be (x - y) mol/L and the molar concentration of H₂ will be (3x - y) mol/L.
Substituting these values into the expression for Kc, we get:
Kc = [NH₃]²/([N₂][H₂]³)
0.286 = y²/[(x - y)(3x - y)³]
Since we know the value of Kc and the initial concentration of N₂ (x), we can solve for the concentration of NH₃ at equilibrium:
y² = 0.286(x - y)(3x - y)³
y² = 0.286(27x⁴ - 81x³y + 81x²y² - 27xy³ + y⁴)
y^4 - 27xy³ + (81x² - 0.286*81x³)y² - 0.286x⁴y² = 0
This is a quadratic equation in y². We can solve for y² using the quadratic formula:
y² = [(27x)³ + 4(81x²)(0.286x⁴)])\(^(1/2)\)- 27x²
y² = 1.326x²
Therefore, the molar concentration of NH₃ at equilibrium is:
y = (1.326x²)\(^(1/2)\)= 1.152x
And the molar concentrations of N₂ and H₂ at equilibrium are:
[N₂] = (x - y) = (1 - 1.152)x = -0.152x (negative concentration is not possible, indicating that the assumption of x for N2 initial concentration was incorrect)
[H₂] = (3x - y) = (3 - 1.152)x = 1.848x
Since the concentration of N₂ cannot be negative, we need to adjust our assumption for x such that [N₂] > 0. Therefore, we can assume that [N₂] = 1 mol/L (for example), which gives:
[H₂] = (3 - 1.152)x = 1.848(1) = 1.848 mol/L
[NH₃] = 1.152 mol/L
Thus, the value of C for the reaction at 257 °C is [NH₃] = 1.152 mol/L.
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Related Questions
Mass spectrometry is ideally suited for analyzing pure compounds. However, when dealing with a mixture that contains several compounds, the compounds must first be separated from each other and then individually injected into the mass spectrometer to yield different spectra. This process has been greatly simplified by the advent of
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Mass spectrometry is ideally suited for analyzing pure compounds. However, when dealing with a mixture that contains several compounds, the compounds must first be separated from each other and then individually injected into the mass spectrometer to yield different spectra. This process has been greatly simplified by the advent of hyphenated techniques.
Hyphenated techniques are a combination of two different analytical methods in one instrument or system. This method combines two or more different analytical methods to separate and analyze a complex mixture of samples. It is one of the methods used to separate complex mixtures before analyzing them with mass spectrometry.
The coupling of different analytical techniques offers many advantages, including the identification of trace components, better detection limits, and simultaneous qualitative and quantitative analysis of complex mixtures. The combination of chromatographic and spectroscopic techniques has proven to be particularly effective in hyphenated techniques.
The hyphenated techniques include: Gas Chromatography-Mass Spectrometry (GC-MS), Liquid Chromatography-Mass Spectrometry (LC-MS), Capillary Electrophoresis-Mass Spectrometry (CE-MS), Pyrolysis-Gas Chromatography-Mass Spectrometry (Py-GC-MS)
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the 5p orbitals fill immediately after the 4d orbitals and immediately before the 6s based on: (select all that apply) select all that apply: observed experimental results theoretical calculations a hypothetical idea none of the above
Answers
Answer:
[-]observed experimental results
[-]theoretical calculations
Explanation:
|x-8|=3x
whats the solution for x
Answers
Girls are usually completely physically mature by _____ years old. A. 17 B. 19 C. 14 D. 21.
Answers
So, A
Answer:
A. 17
Explanation:
Took the test on Edge & got 100% :D
In a few sentences, describe the molecular polarity and the intermolecular forces present in ammonium lauryl sulfate.
Answers
The description of the molecular polarity and the intermolecular forces present in ammonium lauryl sulfate should be explained below.
What is ammonium lauryl sulfate?The common name of it should be likely ammonium lauryl sulfate (ALS) and its molecular formula should be (CH3(CH2)10CH2OSO3NH4).
Also, one intermolecular formula that should be presented in the molecule should be considered as the electrostatic forces of attraction that lies between the non-polar chain and the polar ending group.
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A 58. 6g sample of metal is heated to 95. 2C and then placed in a calorimeter containing 100. 0g of water (specific heat=4. 184 J/gC). The initial temperature of water is 21. 6C. If the final temperature of the water and metal is 25. 4C, what is the specific heat of the metal?
Answers
The specific heat of the metal is approximately \(\(0.397 \, \text{J/g°C}\)\). The specific heat capacity of a substance is a measure of how much heat energy is required to raise the temperature of a given amount of the substance by 1 degree Celsius.
In this case, we can use the principle of conservation of energy to determine the specific heat of the metal. First, we need to calculate the heat absorbed by the water in the calorimeter. We can use the equation:
\(\(q_{\text{water}} = m_{\text{water}} \cdot c_{\text{water}} \cdot \Delta T_{\text{water}}\),\)
where \(\(m_{\text{water}}\)\) is the mass of the water, \(\(c_{\text{water}}\)\) is the specific heat of water, and \(\(\Delta T_{\text{water}}\)\) is the change in temperature of the water.
Plugging in the given values, we find:
\(\(q_{\text{water}} = 100.0 \, \text{g} \cdot 4.184 \, \text{J/g°C} \cdot (25.4 - 21.6) \, \text{°C} = 1586.88 \, \text{J}\).\)
Next, we can calculate the heat lost by the metal, which is equal to the heat gained by the water:
\(\(q_{\text{metal}} = -q_{\text{water}}\).\)
Using the equation for heat transfer, \(\(q = m \cdot c \cdot \Delta T\)\), we can rearrange it to solve for the specific heat of the metal, \(\(c_{\text{metal}}\)\):
\(\(c_{\text{metal}} = \frac{{q_{\text{metal}}}}{{m_{\text{metal}} \cdot \Delta T_{\text{metal}}}}\).\)
Plugging in the given values, we find:
\(\(c_{\text{metal}} = \frac{{-1586.88 \, \text{J}}}{{58.6 \, \text{g} \cdot (25.4 - 95.2) \, \text{°C}}} \approx 0.397 \, \text{J/g°C}\).\)
Therefore, the specific heat of the metal is approximately \(\(0.397 \, \text{J/g°C}\)\).
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You have been given a choice of four elements; Lithium, Magnesium, Sulfur, and Bromine. You must decide which two elements would form a compound that has one atom of the metallic atom and two of the non-metallic atom in the final neutral compound. Which choice lists the two atoms with the correct formula for the compound?
A.
Magnesium and Sulfur; MgS2
B.
Lithium and Bromine; LiBr2
C.
Lithium and Sulfur; Li2S
D.
Magnesium and Bromine; MgBr2
Answers
The compound formed that has been neutral has been Magnesium and bromine. Thus, option D is correct.
The periodic table has been the arrangement of the elements with increasing atomic number and similarity in the reactivity.
The metals in the periodic table are elements that has been able to accept electrons, and nonmetals are the elements in the table that loses electrons to attain the stable noble gas configuration.
Formation of a neutral compoundThe metal and nonmetal form the neutral compound when there has been the formation of stable compound with the complete configuration.
The magnesium and lithium has been metals, while sulfur and bromine are nonmetals. Bromine has been the element of group 17. It has been able to gain an electron. Sulfur has been the nonmetal and required 2 electrons to complete its octet.
Lithium has been the metal with one valence electron, and magnesium with 2 valence electrons.
The neutral compound to be formed has been consisted of one metal with 2 valence electrons, and 2 nonmetals with 1 valence electrons.
Thus, the compound formed that has been neutral has been Magnesium and bromine. Thus, option D is correct.
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You are heating a solution in the laboratory. As the solution heats up, it begins to bubble. After turning off the heat, you notice that the remaining liquid remains colorless, but you smell a sharp odor. Why might you think a chemical reaction has occurred? O A. there is no change of state so there wasn't a reaction B. a smell is produced O c. heating released bubbles O D. there is no color change so there wasn't a reaction
Answers
A chemical reaction might have occurred because of the smell produced. Option B.
Odor production as a sign of chemical reactionThe production of a sharp odor is a good indicator that a chemical reaction has occurred. A chemical reaction often involves the formation of new compounds with different properties from the original compounds. These new compounds may have different odor characteristics.
The lack of a change of state or color change does not necessarily rule out the possibility of a chemical reaction, as not all chemical reactions result in observable changes in these properties.
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Which of the following is NOT part of Dalton's Atomic Theory?
1. Atoms are composed of tiny subatomic particles.
2. Atoms that combine do so in simple, whole-number ratios.
3. All elements are composed of atoms.
4. Atoms of the same element are identical.
Answers
Answer: The statement that theatoms are made up of protons, neutrons, and electrons is not a part of Dalton's atomic theory. Therefore, option c is correct.
Explanation:
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
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Answer:Question
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
Explanation:
Question
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
SOMEONE HELP ME PLEASE
Enter your answer for Answer 1
2:00 minutes
8:00 minutes
Answers
Answer:
0.00 minutes 8.00 minutes
When might Accurate length measurement be important?
Answers
Answer:
When you are going to measure small lengths or objects or when you are going to measure things with great accuracy.
Explanation:
select all the statements that correctly describe the properties of gases.
Answers
Gases are much more compressible than liquids or solids, gases have relatively low density.
Mass per unit volume is measured using the density unit. Given that it is an intense property, the size of the item has no bearing on the value of the property. Density Physics-related meaning The mass-to-volume ratio of an object is known as its density in physics. Mass per unit volume is a frequent definition. Chemistry's use of density The density of a substance in chemistry is a measurement of how much mass there is per unit volume. It is a physical characteristic that is intense, which means that the size of the object has no bearing on its value.
Which of the following statements correctly describe the properties of gases? select all that apply:
-gases have high viscosities
-gases are much more compressible than liquids or solids
-gases have relatively low densities
-gases mix with other gases only if their molecules are of the same type
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A 2.00 g sample of the mineral troegerite, (UO2)3(AsO4)2·12H2O, has 1.38 × 1021 uranium atoms. How many oxygen atoms are present in 2.00 g of troegerite?
Answers
There are approximately 2.21 × 10²² oxygen atoms present in 2.00 g of troegerite.
To find the number of oxygen atoms in 2.00 g of troegerite, we need to calculate the number of moles of troegerite, and then use the mole ratio between oxygen atoms and uranium atoms.
First, we calculate the molar mass of troegerite:
Molar mass of (UO₂)₃(AsO₄)₂·12H₂O =
[3 × (238.03 g/mol) (molar mass of uranium) + 2 × (141.94 g/mol) (molar mass of arsenic) + 12 × (18.02 g/mol) (molar mass of water) + 16 × (15.99 g/mol) (molar mass of oxygen)] =
746.95 g/mol.
Next, we calculate the number of moles of troegerite in 2.00 g:
Number of moles = mass / molar mass = 2.00 g / 746.95 g/mol = 0.00268 mol.
Since the formula (UO₂)₃(AsO₄)2·12₂O contains 16 oxygen atoms, the mole ratio between uranium atoms and oxygen atoms is 1:16.
Therefore, the number of oxygen atoms in 2.00 g of troegerite can be calculated as follows:
Number of oxygen atoms = 1.38 × 10²¹ uranium atoms × (16 oxygen atoms / 1 uranium atom) = 2.21 × 10²² oxygen atoms.
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The graph shows the volume of a gaseous product formed during two trials of a reaction. A different concentration of reactant was used during each trial, whereas the other factors were kept constant.
A graph is shown with two graph lines sloping upwards. The title on the x axis is Time and the title on the y axis is Amount of Product. The graph line with a steeper slope is labeled Trial X and the other is labeled Trial Y.
Which of the following statements explains which trial has a lower concentration of the reactant? (5 points)
Trial X, because the final volume of product formed is lower than Trial Y.
Trial X, because this reaction was initially fast and later stopped completely.
Trial Y, because the reaction was initially slow and later stopped completely.
Trial Y, because the volume of product formed per unit time is lower than Trial X.
Answers
Answer:
Trial Y, because the volume of product per unit time is lower than Trial X
Explanation:
In the chemistry experimental setup, the amount of gaseous product formed by the different concentration of the trials are measured and the result is plotted on a graph
The given graph, shows;
The vertical, y-axis = The amount of product
The horizontal, x-axis = Th time of the reaction
Trial X = The graph line with a steeper slope
Trial Y = The graph line
Increase in the concentration f the reactants, increases the number of collisions, and therefore, the number of effective collisions that gives the product also increases, and the overall rate of reaction increases
A more concentrated reactants produce more product in a shorter time (yield more product in less time) than a less concentrated one, and a more concentrated reactant would have a steeper slope and therefore produce more volume of the product in less time than a less concentrated reactant, which produces a lower volume in the same time
Therefore, the trial that has a lower concentration of the reactant is Trial Y, because the volume of product per unit time is lower than Trial X.
Answer:
There ya go
Explanation:
The solar system is the collective name for the sun, eight planets, and their moons. The
blank is the center of the solar system, and everything orbits around it.
Answers
Answer:
The sun
Explanation:
The sun is the center of the solar system and all the planets orbit around it (moons orbit around respective planets which orbit around the sun)
Answer:
The Sun.
Explanation:
☀️
The Sun is like the “power house” of the solar system, we rely on it, and everything orbits around it.
When we react an acid with a base a neutralisation reaction occurs.
What pH do you end up with?
Answers
Explanation:
Good question!
When you react an acid with a base,the pH of the product is determined by the concentrations of the reactants (the acid and the base)
If both reactants (acid and base) are strong,the pH of the product is 7
If the acid is stronger than the base,the pH of the product will be less than 7
If the base is stronger,the pH of the product will be greater than 7
I hope this helps
Name the following straight-chain Alkanes (picture)
Answers
Answer:
I don't know about the rest but A is heptane
What is the molarity of a solution that has 3.5 moles of NaOH dissolved in 8.50 liters of solution?
Answers
Answer
Molarity (C) = 0.41 mol/L
Explanation
Given:
Number of moles = 3.5 moles
Volume = 8.50 L
Required: Molarity of the solution
Solution
To solve for molarity, you can use the following equation
\(C\text{ = }\frac{n}{V}\)Where C is the concentration or molarity, n is the number of moles and V is the volume of the solution.
C = 3.5 mol/8.50 L
C = 0.41 mol/L
How do emission spectra lines relate to ground and excited states?
Answers
When an electron absorbs energy, it moves from a lower energy state to a higher energy state and emits energy while coming down to the ground state in form of different lights at different energy levels. So, when it is at the excited state initially and moves to lower-excited states it emits light of different frequencies at different energy levels this is known as the emission spectrum.
When an electron absorbs energy, it moves from a lower energy state to a higher energy state and emits energy while coming down to the ground state in form of different lights at different energy levels. So, when it is at the excited state initially and moves to lower-excited states it emits light of different frequencies at different energy levels this is known as the emission spectrum.
Emission spectra: Electrons release energy in the form of light while coming down the ground state in the form of different spectra of light. While at the excited state electron remains at the higher energy level and always has more energy when compared to the ground level whereas in the ground state electron remains at the lowest energy state.
These spectra help in various things like they help in figuring out the kind of elements the substance is made of as every element radiated a different amount of energy.
This is the relation between the emission spectra and the ground and excited state of an electron.
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Homogenous mixture are _______ mixture
Answers
Answer:
mixture in which the composition is uniform throughout the
Explanation:
Are the following chemical equations reversible or irreversible?
2H2O ←→ H3O+ + OH-
HA + H2O ←→ A- + H3O+
HA + H2O → A- + H3O+
MOH → M+ + OH-
Answers
The first two chemical equations are reversible while the other two are irreversible.
What are chemical equations?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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The swimmer in the pool is making waves when he swims. Choose two sentences that describe both the swimmer’s waves and the waves the worker makes when he hammers on a ladder. Write the letters of the correct answers on the line at left.
Plsssss
Answers
Answer:
Energy is transferred from one place to another in the form of waves. Waves has two parts i.e. crest and trough.
Explanation:
Energy is transferred from one place to another in the form of waves. Waves has two parts, the highest part of a wave is called the crest, whereas the lowest part is called trough. The distance between the crest and the trough of a wave is known as wave height. When we drop something in the water, waves are produced having high crest and trough means high wave length whereas waves produced on the solid body has low crest and trough means low wave height.
the ch resonance at d 4.0 is listed as having a ddq pattern. what is that an abbreviation for and what accounts for that observed pattern? (explain which neighbors account for the different parts of the splitting pattern
Answers
2,3-Dichloro-5,6-Dicyanobenzoquinone is abbreviation of DDQ.
A stronger oxidant than 1,4-benzoquinone, DDQ (2,3-dichloro-5,6-dicyanobenzoquinone) is employed as a reagent for oxidative couplings, cyclization processes, and the dehydrogenation of hydroaromatic compounds.
What in chemical chemistry is DDQ?
In dry conditions, the powerful oxidizing quinone DDQ is eternally stable. It is frequently used to create aromatic and,-unsaturated carbonyls from organic molecules as well as to convert activated methylene and hydroxy groups into carbonyl compounds.
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NaN3 → Na + N2 as a balanced equation
Answers
Answer:
na + B2 = t
Explanation:
Answer:
2NaN3→ 2Na + 3N2 is the balanced equation
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An iceberg has a volume of 7670 cubic feet. What is the mass of the ice (in kg ) composing the iceberg?
Answers
An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg
The volume of iceberg = 7670 cubic feet.
Density of ice = 0.917 g/cm\(^{3}\)
so, Density is given by,
Density = mass / volume
density of ice = (0.917 /1000) kg/cm\(^{3}\)
1 cm\(^{3}\) = 0.00003531 ft\(^{3}\)
therefore,
0.000917 kg/cm\(^{3}\) = (0.000917 × 0.00003531 ) kg/ft\(^{3}\)
= 0.0000000324 kg/ft\(^{3}\)
now,putting the values in formula , we get,
Density = mass / volume
mass = density × volume
= (0.0000000324 × 7670 ) kg
= 0.0002483 kg
Hence,An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg.
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The proteins in the cell membrane allow substances to come or go based on their concentrations. This is an important part of _____ which maintains the immediate conditions necessary for life.
a. osmosis
b. metabolism
c. homeostasis
d. endocytosis
Answers
Answer:
C. Homeostasis
Explanation:
Two significance of melting point
Answers
The significance of melting points are
it gives us a idea about inter molecular force which binds the particles together.at melting point the solid and liquid states exist in equilibrium.What is melting point?The melting point is the temperature at which a given substance change its physical state from solid to liquid. At this point solids and liquids exist at equilibrium. Melting point of a substance depends on pressure. The melting point of ice increases when pressure decreases. Melting point of a substance decreases by the presence of impurities in it. so you increase or decrease the melting point on any substance by adding more impurities. Ionic bonds, shape and size of molecules are some other factors that affect the melting point.
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What are some signs that a chemical change has occurred?
Answers
Answer:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
THe Precipitate (formation of a solid)
Explanation:
if the acid dissociation constant, ka, for an acid ha is at 25°c, what percent of the acid is dissociated in a 0.50 m solution of ha at 25°c?
Answers
Approximately x% of the acid is dissociated in a 0.50 M solution of HA at 25°C.
What is the mathematical expression for the percent dissociation of an acid?The percent dissociation of an acid can be determined using the acid dissociation constant (Ka) and the initial concentration of the acid (HA). The mathematical expression for percent dissociation is:
Percent Dissociation = (Dissociated HA concentration / Initial HA concentration) * 100
In this case, we are given that the acid dissociation constant (Ka) for acid HA is known at 25°C, and we have a 0.50 M solution of HA. However, the value of Ka and specific acid are not provided, so we cannot calculate the exact percent dissociation.
To calculate the percent dissociation, you would need the value of Ka for the specific acid, which indicates the extent of dissociation at equilibrium. Based on this value and the initial concentration of HA, you can calculate the dissociated HA concentration and then use the mathematical expression mentioned above to determine the percent dissociation.
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