Answers
3. At 250°C, the equilibrium constant for the reaction is 0.111 mol/L.
4. [NO] is 25.92 M at equilibrium.
5. [NH3] is 0.45 M at equilibrium.
What is the equilibrium constant, Keq, of the reaction?The balanced chemical equation for the reaction is:
H2(g) + I2(g) ⇌ 2HI(g)
At equilibrium, we have [H2] = 4 - 1 = 3 mol/L, [I2] = 4 - 1 = 3 mol/L, and [HI] = 1 mol/L.
The expression for the equilibrium constant, Keq, is:
Keq = [HI]^2 / ([H2] x [I2])
Substituting the values we obtained, we get:
Keq = (1 mol/L)^2 / ((3 mol/L) x (3 mol/L))
Keq = 0.111 mol/L
4. Using the equilibrium constant expression: Keq = [N2][O2] / [NO]^2
Since the reaction is 2 NO ⇄ N2 + O2, we can assume that at equilibrium the concentration of N2 and O2 are equal and x, and the concentration of NO is 2x (since the stoichiometry is 2:1). Therefore, we have:
Keq = x^2 / (2x)^2
42 = x^2 / 4x^2
x^2 = 42 * 4x^2
x^2 = 168x^2
x^2 - 168x^2 = 0
x^2 (1 - 168) = 0
x = 0 (not possible) or x = √(168) = 12.96 M
5. Using the equilibrium constant expression: Keq = [NH3]^2 / [H2]^3[N2]
Substitute the given values: Keq = 20, [H2] = 0.40 M, [N2] = 0.25 M, and let x be the equilibrium concentration of NH3. Then:
Keq = x^2 / (0.40)^3(0.25)
20 = x^2 / 0.010
x^2 = 0.010 x 20
x^2 = 0.2
x = √(0.2)
x = 0.45 M
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Related Questions
3
Li
6.941
Atomic # =
Atomic Mass =
# of Protons =
# of Neutrons =
# of Electrons =
Answers
Answer:
36.94133.23Explanation:
pls mark brainliest
How did Thomson's discovery of neon's isotopes lead to the discovery of neutrons?
Answers
Answer:
Neon consisted of atoms of two different masses but chemically alike. ... Movement of electrons between energy levels in atom must absurb just a certain amount energy to move to higher level can't hover between levels.
40 points. Explain how a substituted hydrocarbon is made.
Answers
Answer: Organic acids form when a carboxyl group (−COOH) is substituted for one of the hydrogen atoms in a hydrocarbon.
Considering the principles of KMT, which scenario would result in an increase of particles effective collisions at STP None of the above None of the above In a balloon In a balloon A container with large volume A container with large volume A container with small volume
Answers
Answer:
A container with small volume
Explanation:
The question is obviously incomplete because the image attachments are missing.
However, it is necessary to note that, the effective collisions depends on the volume of the gas.
The lesser the gas volume, the greater the effective collision between particles at STP.
Hence from the KMT, the scenario having the least volume of gas will have the greatest magnitude of effective collisions.
which of the following solutions has a greater concentration of hydronium ions? solution a has a ph of 8.0. solution b has a ph of 13.5.
Answers
Solution A with pH of 8 has greater concentration of hydronium ions as compared to solution B with pH of 13.5.
pH = -log [H3O+]. By using the opposite mathematical procedure from that used to determine the pH, the hydronium ion concentration can be calculated from the pH.
The pH lowers as the hydronium content rises, making the fluid more acidic. When an acid is introduced, this happens. The solution's hydronium concentration rises when H+ ions separate from the acid and join with water to produce hydronium ions.
Any time an acid dissolves in water, the hydronium ion is created. The nearest water molecule is always where the acid's H+ moves to produce H3O+. Take the perspective of the proton (H+) to see the hydronium ion from a different angle. Hydration refers to the addition of water to anything.
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Give 3 physical properties common to most metals
Answers
Answer:
What are you a 6 yo? Anyways, the most common properties are, They are good conductors of electricity, They are lustrous and They are sonorous.
draw the structure(s) of all of the alkene isomers, c6h12, that contain an unbranched chain and that do not have e/z isomers.
Answers
The five possible butene isomers are 1-Butene, 2-Butene, 3-Butene, cis-2-Butene, and trans-2-Butene. The structural formulae of the five butene isomers are given below:1-Butene:2-Butene:3-Butene:cis-2-Butene:trans-2-Butene:
The structural formulae of all the alkene isomers, C₆H₁₂ that contain an unbranched chain and that do not have E/Z isomers are: There are five alkene isomers, C₆H₁₂ that contain an unbranched chain and that do not have E/Z isomers. All of them are butene isomers.
Alkenes are hydrocarbons that contain carbon-carbon double bond and isomers are compounds that have the same molecular formula but different structural arrangement or spatial orientation.
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Can magic 8 ball wash with water?
Answers
What word chemical equation describes Cavendish’s experiment with zinc?
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Answers
Answer:
The reaction between zinc and HCl is given by the symbolic equation
Zn + HCl → ZnCl2 + H2.
It required 15 cm° of 0.05 mol/dm° sulfuric acid to neutralise 25 cm° of potassium hydroxide. Calculate:
(i) the number of moles of sulfuric acid in the titration
[1]
(ii) the concentration of the aqueous
potassium hydroxide
[2]
(iii) the mass of potassium hydroxide dissolved in 25 cm? of solution.
Answers
1. moles = concentration × volume
= 0.05 × (15/1000)
divide by 1000 as molar concentration is in dm (1000 cm meaning for every 1000 cm of liquid there is 0.05 moles)= 0.00075 moles
2. the concentration of aqueous potassium hydroxide
h2so4 + 2kcl = 2hcl + k2so4 (balanced equation)
this equation may be wrong as the products formed in the reaction between kcl and h2so4 varies by temperature/concentration hence the mole ratio could change.1 (h2so4) : 2 (kcl) mole ratio thus kcl has twice the number of moles.
0.00075 x 2 = 0.0015 moles
concentration = 0.0015 ÷ (25/1000)
= 0.06 mol/dm^-3
3. mass of potassium hydroxide dissolved in 25cm
there are 0.0015 moles in 25cm
mass= moles × molar mass
= 0.0015 × 74.5
= 0.11 grams
molar mass of kcl = 74.5 g/mol
the overall take away of an experiment’s results is the______. A. hypothesis B. introduction C. conclusion
Answers
Answer:
conclusion
Explanation:
it can't be a hypothesis since tests are carried out to verify so it is not a theory
an introduction to an experiment only gives the basis of what we are investigating therefore nothing has been proven and the question is still unanswered
The overall takeaway of an experiment’s results is the conclusion. Hence, option C is correct.
What is a hypothesis?A hypothesis is a testable statement about the relationship between two or more variables or a proposed explanation for some observed experiment.
The overall takeaway of an experiment’s results can't be a hypothesis since tests are carried out to verify so it is not a theory
An experiment only gives an idea about the investigation therefore nothing has been proven and the question is still unanswered.
Hence, the overall takeaway of an experiment’s results is the conclusion.
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E. Compare the entropy of the
H₂O(l) to the H₂O(g) that is formed
F. Determine the mass of liquid water that vaporizes if 7700 joules of energy is absorbed by the H₂O(l) at 100.°C.
Answers
Answer:
e. The entropy of the H₂O(g) is greater than that of H₂O(l) because gases have more entropy than liquids.
f. We need to use the formula:
q = m × ΔHvap
where q is the heat absorbed, m is the mass of liquid water that vaporizes, and ΔHvap is the enthalpy of vaporization of water (40.7 kJ/mol or 2257 J/g at 100°C).
To use this formula, we need to convert the given energy of 7700 J to kJ:
7700 J ÷ 1000 = 7.7 kJ
Then, we can plug in the values:
7.7 kJ = m × 2257 J/g
m = 7.7 kJ ÷ 2257 J/g
m = 3.41 g
Therefore, 3.41 g of liquid water would vaporize if 7700 J of energy is absorbed by the H₂O(l) at 100°C.
Explanation:
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The water cycle is also known as the _______ cycle?
Answers
Answer:
hydrological cycle
Explanation:
water cycle is also known as hydrological vycle
Answer:
Hydrological Cycle :)
Explanation:
Element X has 2 naturally occurring isotopes. The first isotope has an atomic mass of 44.009 amu and it’s percent abundance is 33%. The second isotope has an atomic mass of 40.5 amu and it’s percent abundance is 67%. What is the atomic mass of Element X
A 39.99 amu
B 39.91 amu
C 40.42 amu
D 41.66 amu
Answers
Answer:D, 41.66
Explanation:subtract 33 from 100 to get 66 then multiply the percentages with the amu
The average atomic mass of element X is equal to 41.66 amu. Therefore, option D is correct.
What is the natural abundance of elements?Natural abundance can be defined as the abundance of isotopes of an element that is naturally found on a planet. The atomic mass of these isotopes can be defined as the atomic weight of the chemical element in the modern periodic table.
The abundance of an isotope varies from planet to planet but remains constant at a particular time. The natural abundance can be affected by the probability of its formation in nucleosynthesis.
Given, the mass of the first isotope = 44.009 amu, natural isotope = 33 %
The mass of the second isotope = 40.5 amu, relative abundance = 67 %.
Average atomic mass = 44.009 × 0.33 + 40.5 × 0.67
Average atomic mass = 14.52 + 27.14 = 41.66 amu
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1. How did Moseley offering a different explanation than Mendeleev on the organization of elements advance science?
A. It helped prove that there are no undiscovered elements.
B. It established atomic numbers as the basis for the periodic table
C. It helped uncover previously undiscovered elements.
D. It established atomic mass as the basis for the periodic table.
2. Why is empirical knowledge important?
A. It provides science with facts.
B. It lets scientists conduct investigations
C. It turns experiences into facts.
D. It helps scientists make observations
Answers
Moseley offering a different explanation than Mendeleev on the organization of elements advance science by option B. It established atomic numbers as the basis for the periodic table
The empirical knowledge is important by option D. It helps scientists make observations.
What is the explanation about?Moseley's contribution to the organization of elements advanced science by establishing atomic numbers as the basis for the periodic table (Option B). This helped to improve the accuracy of the periodic table, making it possible to predict the properties of new elements based on their atomic number.
Therefore, Empirical knowledge is important because it provides science with facts (Option A). Empirical knowledge is based on observations and experiences, which can be tested and verified through experiments. This helps to build a solid foundation for scientific understanding, as empirical knowledge provides a basis for scientific theories and models.
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Determine Laminar flow
Answers
Answer:
For practical purposes, if the Reynolds number is less than 2000, the flow is laminar. If it is greater than 3500, the flow is turbulent. Flows with Reynolds numbers between 2000 and 3500 are sometimes referred to as transitional flows.
Explanation:
Turbulence appears when the Reynolds number is about 2300. Reynolds number = (density * D * flow speed) / viscosity. Details of the calculation: Reynolds number = (1.25 kg/m3)*(0.1 m)*(35 m/s)/(1.83*10-5 N s/m2) = 2.39*105.
Find the distance between the two points rounding to the nearest tenth (if necessary). ( 8 , − 5 ) and ( 1 , 1 )
Answers
The distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.
What is the distance between two points?
The distance between two points is calculated using the following equation.
for a given points (x1, y1), (x2, y2), the distance, d is;
d = √[(x2-x1)² + (y2 - y1)²]
From the given question;
x1 = 8, y1 = -5
x2 = 1, y2 = 1
distance = √[(1-8)² + (1 - -5)²]
distance = √[(-7)² + (16)²]
distance = 9.22 units
Thus, the distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.
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A sample of iron receives 50 J of heat energy that raises the temperature of the iron to a delta T of 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?
(Show working out)
Answers
Answer: 20 g
Explanation: heat received Q = m c dT
Q= 50J , dT= 25 C anc c= 0.10 J / g C
And m = Q / c dT
The mass of the iron sample that received the heat is determined as 20 g.
Mass of the iron sampleThe mass of the iron sample is calculated as follows;
Q = mcΔT
where;
m is mass of the iron sampleC is the specific heat capacityΔT is change in temperaturem = Q/cΔT
m = (50) / (0.1 x 25)
m = 20 g
Thus, the mass of the iron sample that received the heat is determined as 20 g.
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When an atom of chromium loses three electrons, it is called a:
Do not answer "cation" or "anion."
It has to be another name then cation or anion?
Answers
It’s probably ions
Which statement about atoms during a chemical change is true?
Answers
Answer:
In a chemical reaction, only atoms are present in the reactant and can end up with molecules. No new atoms are created and no more atoms are destroyed. In a chemical reaction, reactants contact with each other and the bond between atoms in the reactant is broken and atoms rearrange and form new bonds to make the product.
Explanation:
When a reaction is balanced we know that the number of _______ is the same on both sides of the reaction.
Answers
Answer:
Atoms I think
Explanation:
When an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced.
thermochemistry problem Could you please type everything because when it says tutor is working on equation I cant see it only when its typed.
Answers
Answer
84.8485 g
Explanation
Initial temperature, T₁ = 148 °C
Final temperature, T₂ = 20.4 °C
ΔT = T₂ - T₁
ΔT = 20.4 - 148
ΔT = -127.6 °C
Since heat is released, i.e heat loss, then Q = -324.8 calories
specific heat of the lead bar, c = 0.0300 cal/g°C
Using Q = mcΔT, we can find m as shown below
\(\begin{gathered} -324.8=m\times0.0300\times(-127.6) \\ -324.8=-3.828m \\ \text{Divide both sides by -3.828} \\ -\frac{324.8}{-3.828}=-\frac{3.828m}{-3.828} \\ \Rightarrow m=84.8485\text{ g} \end{gathered}\)The mass of the bar is 84.8485 g
Can you explain question 23 please
Answers
In regards to the question, it can be said that 25.7 g of solid methanol must be heated to its melting point to reach a temperature of
Q=2.6kJ
From the query, we learn
Determine the amount of heat needed to completely melt 25.7 g of solid methanol at its melting point.
In general, the mathematical formula for heat is
Q=N*u
Where
Methanol has a mass of 32.04g/mol.
Methanol's molar heat of fusion is 3200 J/mol.
How many moles are in 25.7g?
frac = 25.7g 32.04
n=0.8mol
Hence
at its melting point, 25.7 g of solid methanol needs to be heated to a temperature of
Q=0.8*3.2
Q=2.6kJ
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can someone help me please ?
Answers
Answer:
5N would be the net force if i'm correct 5N and 5N cancle each other out then all your left with would be 5N
Explanation:
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name-
age-
and fav color just tring to meet new people
Lana drew the diagram below to model asexual reproduction. Based on Lana's diagram, which statement explains the results of asexual reproduction? A. The offspring are not genetically identical to the parent, because each offspring receives only half of the chromosomes from a single parent. B. The offspring are not genetically identical to the parents, because two parents each contribute half of their chromosomes to each offspring. C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes. D. The offspring are genetically identical to the parents, because two parents each contribute a complete copy of their chromosomes to each offspring.
Answers
Based on Lana's diagram, the correct statement that explains the results of asexual reproduction is C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes.
What happens in asexual reproduction?In the diagram, the parent cell divides into two identical daughter cells, each of which contains a complete copy of the parent cell's genetic material.
This type of reproduction, where a single parent produces offspring that are genetically identical to itself, is called asexual reproduction. It is the process by which many unicellular organisms, such as bacteria and some protists, reproduce.
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What is the condensed structural formula for the product of the reaction of 2-butene with water and a strong acid catalyst?
Answers
The condensed structural formula for the product of the reaction of 2-butene with water and a strong acid catalyst is shown below ,
First write the condensed structural formula of 2-butene and indicate that it reacts with water. Then write the condensed structural formula of 2-butanol after the reaction arrow to indicate that it is the product. Finally, write the formula for the catalyst above the arrow.
The acid first attack at double bonded carbon of 2-butene and produce stable carbocation then water molecule attack on carbocation followed by deprotonation .
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Somebody please help me with this.
Answers
Answer:
2. Chemical reactions changes occur when the bonds between atoms in a molecule are created or destroyed.
3. When you reach your its boiling point, the molecules in liquid have enough energy to become a gas.
4. When you have a solid with more than one type of compound, it is called a mixture.
5. A Crystal is a form of solid where the atoms are arranged is a very specific order.
6. If you have different types of molecules dissolved in a liquid, it is called a solution
Magnetic reversals have helped to support
a.
the theory of Pangaea.
c.
sea-floor spreading.
b.
the age of the Earth.
d.
the theory of Gondwana.
Answers
Answer:
Sea floor spreading
Explanation:
Magnetic reversals have helped to support the Sea floor spreading
what will you use to prepare the calibration curve in this project? group of answer choices a solvent blank. a series of solutions with the exact same analyte concentration. a series of solutions with various unknown analyte concentrations. a series of solutions with a range of precisely known analyte concentrations.
Answers
A series of solutions with a range of precisely known analyte concentrations. Option D
What is a calibration curve?A calibration curve is a graphical representation of the relationship between the concentration or amount of a substance, and a signal or measurement obtained from an analytical instrument or assay. The calibration curve is constructed by measuring the signal or response of the instrument or assay at different known concentrations or amounts of the substance, and plotting these values on a graph.
The resulting curve is then used to determine the concentration or amount of the substance in an unknown sample by measuring its signal or response and comparing it to the calibration curve.
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6. Neon has 10 electrons - 2 in the inner shell and 8 in the outer shell. This arrangement of 8 electrons in the
outer shell is extremely stable and makes neon inert, with a valence of zero. Sodium has 11 electrons - 2
in the first shell, 8 in the next shell, and I in the outer shell. Fluorine has 9 electrons - 2 in the first shell
and 7 in the outer shell. How could sodium and fluorine from a compound in which both elements would
be like neon with 8 electrons in the outer shell?
Answers
Let look at EC of Sodium(Na)
\(\\ \sf\longmapsto 1s^22s^22p^63s^1\)
valency= +1Now look at EC of Fluorine
\(\\ \sf\longmapsto 1s^22s^22p^5\)
Valency=-1Now the Compound will be
\(\\ \sf\longmapsto NaF\)