A deficiency of ADH in the body causes which disease
2NH4Cl(s)+Ba(OH)2⋅8H2O(s)→2NH3(aq)+BaCl2(aq)+10H2O(l) The ΔH for this reaction is 54.8 kJ . How much energy would be absorbed if 24.7 g of NH4Cl reacts?
What is the most effective way to differentiate between potassium feldspar and plagioclase feldspar?
A gas occupies 22.4 l at stp and 14.5 l at 100c and 2.00 atm pressure. how many moles of gas did the system gain or lose?
To find the number of moles of gas gained or lost, we can use the ideal gas law equation. By substituting the given values into the equation and simplifying, we find that the system gained or lost 0.921 moles of gas.
Explanation:To find the number of moles of gas gained or lost, we will use the ideal gas law equation:
P1V1 / T1 = P2V2 / T2
Using the given information:
P1 = 1 atm, V1 = 22.4 L (at STP), T1 = 273 K
P2 = 2.00 atm, V2 = 14.5 L, T2 = 100 °C = 373 K
Substituting the values into the equation:
(1 atm)(22.4 L) / (273 K) = (2.00 atm)(14.5 L) / (373 K)
Simplifying the equation:
Moles gained or lost = (1 atm)(22.4 L)(373 K) / (273 K)(2.00 atm)(14.5 L)
Calculating the result:
Moles gained or lost = 0.921 moles
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What tool does the US government use to keep track of inflation throughout the years?
A. The Value Calculator
B. The Consumer Price Index
C. The Monetary Supply
D. The Inflation Scale
27 POINTS!!
Use the following table of a school bus during morning pickups to calculate its average speed between 0 h and 2.34 h.
please show work :)
16.34 km/2.34 h = 6.98 km/h
How much would the temperature of 275 g of water increase if 36.5 kj of heat were added?
Answer: The temperature increase will be 31.70°C.
Explanation:
To calculate the increase in the temperature of the system, we use the equation:
[tex]q=mc\Delta T[/tex]
where,
q = Heat absorbed = 36.5 kJ = 36500J
m = Mass of water = 275 g
c = Specific heat capacity of water = [tex]4.186J/g^oC[/tex]
[tex]\Delta T[/tex] = change in temperature = ? °C
Putting values in above equation, we get:
[tex]36500J=275\times 4.186J/g^oC\times \Delta T\\\\\Delta T=31.70^oC[/tex]
Hence, the temperature increase will be 31.70°C.
A sample of propane (C3H8) has a mass of 0.47 g. The sample is burned in a bomb calorimeter that has a mass of 1.350 kg and a specific heat of 5.82 J/(g • °C). How much energy is released by the reaction if the temperature of the calorimeter rises by 2.87°C?
Use mc018-1.jpg.
7.85 kJ
10.6 kJ
22.5 kJ
47.9 kJ
Answer:
22.5kJ
Explanation:
your welcome
Calcium hydroxide reacts with carbon dioxide to form calcium carbonate (balanced equation given below). if you start with 155 ml of a 1.25 m solution of calcium hydroxide and add 10.0 g of carbon dioxide, how much calcium carbonate would be formed?
The k a for hypochlorous acid, hocl, is 3.0 × 10-8 at 25°c. calculate the pk b for hypochlorous anions.
Answer : The value of [tex]pK_b[/tex] for hypochlorous anion is, 6.47
Explanation :
As we know that,
[tex]pK_a+pK_b=pK_w\\\\pK_a+pK_b=14\\\\pK_b=14-pK_a\\\\pK_b=14-(-\log K_a)\\\\pK_b=14+\log (K_a)[/tex]
Now put the value of [tex]K_a[/tex] in this expression, we get the value of [tex]pK_b[/tex]
[tex]pK_b=14+\log (3.0\times 10^{-8})[/tex]
[tex]pK_b=14+\log 3-8[/tex]
[tex]pK_b=6.47[/tex]
Therefore, the value of [tex]pK_b[/tex] for hypochlorous anion is, 6.47
The difference between strong and weak acids is determined by the acid dissociation constant (Kₐ). As Kₐ rises, the acid dissociates more. Therefore, strong acids must dissociate more in water. On the other hand, a weak acid has a lower propensity to ionize and release a hydrogen ion, resulting in a less acidic solution.
The standard used to calculate a molecule's alkalinity is called pkb. It is employed to gauge fundamental strength. The base will be more powerful with a lower pKb value. It is akin to the base dissociation constant's negative logarithm, Kb.
The equation connecting pKa and pKb is:
pKa + pKb = pKw
pKa + pKb = 14
pKb = 14-pKa
pKb = 14 - (-log Ka)
pKb = 14 + log (3.0 × 10⁻⁸)
pKb = 14 - 7.52
pKb = 6.48
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The chemical equation below shows the combustion of methane (CH4).
CH4 + 2O2 mc031-1.jpg CO2 + 2H2O
The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will form when 8.94 g O2 completely react?
3.25
6.15
13.0
53.0
Answer:
B
Explanation:
edg 2020
What is the purpose of DNA? A) manufactures proteins Eliminate B) reduces activation energy C) stores hereditary information D) to aid in facilitated diffusion
Polyatomic ions ______.
Given that 0.403 g of nitrogen combines with 0.0864 g of hydrogen and H is assigned an atomic mass of 1.00 amu calculate the atomic mass of nitrogen based on the formula NH.
Given,
Mass of nitrogen = 0.403 g
Mass of hydrogen = 0.0864 g
Atomic mass of H = 1 amu
Moles = mass / molar mass
Molar mass of H₂ = 1 x 2 = 2 g/mol
Moles of hydrogen = 0.0864 g / 2 g/mol = 0.0432 moles
Nitrogen combines with hydrogen hence the chemical equation is:
N₂ + 3H₂ → 2NH₃
As per the balanced chemical reaction, 3 moles of H₂ combines with 1 mole of N₂
or, 1 mole of H₂ combines with 1/3rd mole of N₂
Therefore, 0.0432 moles of H₂ will combine with (1/3 x 0.0432 moles of N₂)
Moles of N₂ = 0.0144 mol
Molar mass = mass / moles
Molar mass of N₂ = (0.043 g N₂) / (0.0144 mol N₂) = 2.986 g/mol of N₂
Atomic mass of N = 2.986/2 = 1.493 amu
Matt and Brad own a ice cream store and they believe they have the best ice cream in town. They invite ten of their closest friends to their ice cream shop, give them free ice cream, and then ask for their opinions. Brad and Matt encouraged their friends to try other ice cream shops, but they told them that they would have to buy the ice cream there. After a week, Matt and Brad took all the participants out to dinner and 90% of the "tasters" voted Matt and Brad's shop to be the best in town. Which of these would NOT lead to bias in this experiment?
A)Matt and Brad took the participants to dinner.
B)Only ten participants were used in the experiment.
C)Only friends were used in the experiment, and friends will quite often be nice to each other.
D)The "tasters" received free ice cream from Matt and Brad, but they had to pay for it at the other shops.
Sensitivity analysis is concerned with how certain changes affect
a. the feasible solution.
b. the degenerative solution.
c. the optimal solution.
d. the unconstrained solution.
Final answer:
Sensitivity analysis is concerned with how changes in variables or assumptions impact the optimal solution of a model, assisting in decision-making by evaluating the solution's robustness under different conditions. The correct option is C.
Explanation:
Sensitivity analysis is primarily concerned with understanding how changes in certain variables or assumptions affect the outcome of a model. Specifically, this type of analysis is focused on the impact of these changes on the optimal solution. It systematically alters key assumptions, computations, or input data, comparing the new results against the original model to assess the variance. This process is valuable in both analytical and computational approaches to solve constrained optimization problems. By exploring the comparative statics analysis, sensitivity analysis helps in determining how a firm, for instance, would respond to changes in one of its exogenous variables, holding all else constant (ceteris paribus).
In essence, sensitivity analysis serves as a critical tool in decision-making processes, assisting in evaluating the robustness and reliability of an optimal solution under varying conditions.
In the balanced equation for the reaction: xp4o6(s) + yh2o(l) → zh3po3(aq) if x equals 2, the coefficient z equals:
When balancing the equation given xP₄O₆ + yH₂O -> zH₃PO₃with x equals 2, we need 8 molecules of H₃PO₃ to balance the phosphorus atoms, making the coefficient z equal to 8.
The question asks about balancing the chemical equation xP₄O₆(s) + yH₂O(l) -----> zH₃PO₃(aq) with the given condition that x equals 2. To balance the equation, we need to ensure that the number of each type of atom is the same on both sides of the equation. When x equals 2, this implies we have 2 P₄O₆ units leading to 8 phosphorus atoms in total. Each H₃PO₃ molecule contains one phosphorus atom, so we would need 8 molecules of H₃PO₃ to balance the phosphorus atoms. Thus, the coefficient z would be 8 in a balanced equation.
Nuclear power plants have the greatest environmental impact during __________. A) operation B) mining C) waste disposal D) construction E) none of the above
Is a ph = 7.00 solution acidic, basic, or neutral at 37 °c?
At 37°C, a solution with a pH of 7.00 is slightly basic, because the neutral pH at this temperature is around 6.31.
A solution with a pH of 7.00 is typically considered neutral at a standard temperature of 25°C. However, the pH scale is temperature-dependent, meaning the pH for neutrality changes with temperature. At 37°C, which is around the normal human body temperature, the neutral pH is not 7.00, but rather closer to 6.31 because the ionization constant of water (Kw) changes with temperature.
In the specific instance of a solution with a pH of 7.00 at 37°C, we would consider it to be slightly basic. This is because, at 37°C, the neutral pH is approximately 6.31, and any pH above this value represents a basic solution, while a pH below this value would indicate an acidic solution.
what is stab pull?
A. color, denser crust sinks into mallet
B. folding and crumpling and sliding up word to create a mountain
C. when edges become denser and gravity pulls then down word and away from one another
D. currents just beneath the earths crust flow very slowly, causing moment of the plates move above them
Stab pull is the process by which the Earth's tectonic plates move apart at their edges due to the force of gravity at divergent plate boundaries. It leads to the formation of mountains and volcanic activity.
Explanation:Stab pull refers to the process by which the Earth's tectonic plates move apart at their edges due to the force of gravity. This occurs at divergent plate boundaries, where the edges of the leaves become denser and sink downwards and away from each other. As a result, new crust is created from magma upwelling beneath the leaves, leading to the formation of mountains and volcanic activity.
For example, the East African Rift System is a prime location for stab pull. The African Plate is splitting apart along this boundary, causing the formation of the Great Rift Valley and the creation of a new crust.
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Is milkshake a solution or a mixture.
In the electromagnetic spectrum, ________ frequencies, ________ wavenumbers, and ________ wavelengths are associated with high energy.
In the electromagnetic spectrum, high frequencies, high wavenumbers, and low wavelengths are associated with high energy.
What is electromagnetic spectrum?Electromagnetic spectrum is the range of frequencies of electromagnetic radiations and their respective wavelengths and photon energies.
Energy of a photon in electromagnetic spectrumThe energy of a single photon in an electromagnetic spectrum is calculated as;
E = hf
[tex]E = \frac{hc}{\lambda}[/tex]
where;
f is frequencyλ is the wavelengthRelationship between wavenumber and wavelength
[tex]n = \frac{1}{\lambda}[/tex]
Thus, in the electromagnetic spectrum, high frequencies, high wavenumbers, and low wavelengths are associated with high energy.
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Select which intermolecular forces of attraction are present between ch3ch2nh2 molecules.
The intermolecular forces present between [tex]{\text{C}}{{\text{H}}_3}{\text{C}}{{\text{H}}_2}{\text{N}}{{\text{H}}_2}[/tex] molecules are
[tex]\boxed{{\text{hydrogen bonding and dispersion forces}}}[/tex]
Further Explanation:
Intermolecular forces:
The forces that exist between the molecules are known as intermolecular forces (IMF). IMF includes both attractive as well as repulsive forces. They are electrostatic in nature and determine the bulk properties of the substances like melting and boiling points. Molecules are held in any substance due to these forces.
The various types of intermolecular forces are as follows:
1. Hydrogen bonding:
It is an attractive force that exists between hydrogen and more electronegative elements like N, O, F. It can either be intermolecular or intramolecular. Intermolecular hydrogen bonding is the one that occurs between different molecules. For example, the bond between HF and [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex] is an intermolecular hydrogen bond. Intramolecular hydrogen bonding occurs between various parts of the same molecule. Ortho-nitro phenol and salicylaldehyde show this type of bonding.
2. Ion-dipole forces:
It is an attractive force that occurs between an ion and a molecule consisting of a dipole. The force between [tex]{\text{N}}{{\text{a}}^ + }[/tex] and water molecule is an example of this force.
3. Ion-induced dipole forces:
It is an attractive force that occurs between an ion and a nonpolar molecule. It induces a dipole in the molecule, resulting in ion-induced dipole force. The bond between [tex]{\text{F}}{{\text{e}}^{2 + }}[/tex] and oxygen molecule is an example of such kind of bond.
In [tex]{\mathbf{C}}{{\mathbf{H}}_{\mathbf{3}}}{\mathbf{C}}{{\mathbf{H}}_{\mathbf{2}}}{\mathbf{N}}{{\mathbf{H}}_{\mathbf{2}}}[/tex] , there is a presence of amine group [tex]\left({{\text{ - N}}{{\text{H}}_2}}\right)[/tex] having a highly electronegative N atom. So it can form hydrogen bonds with hydrogen atom of solvent molecule like water. Also, a hydrocarbon chain [tex]\left({{\text{ - C}}{{\text{H}}_3}{\text{C}}{{\text{H}}_2}}\right)[/tex] is present in the molecule and we know dispersion forces exist between atoms and molecules. So [tex]{\text{C}}{{\text{H}}_3}{\text{C}}{{\text{H}}_2}{\text{N}}{{\text{H}}_2}[/tex] has both dispersion forces as well as hydrogen bonds between its molecules.
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Ionic and covalent bonding
Keywords: Intermolecular forces, CH3CHNH2, hydrogen bonding, dispersion forces, -NH2, -CH3CH2, amine, hydrocarbon, atoms, molecules.
Which of the groups highlgihted in the periodic table in the periodic table?
Identify the product of radioactive decay and classify the given nuclear reactions accordingly.
The product of radioactive decay :
₂He⁴ ₋₁e⁰γ ₁e⁰ Further explanationThe atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.
Usually radioactive elements have an unstable atomic nucleus.
The main particles are emitted by radioactive elements so that they generally decay are alpha (α), beta (β) and gamma (γ) particles
General formulas used in decay:
[tex] \large {\boxed {Nt = No. (\frac {1} {2}) ^ {\frac {T} {t1 / 2}}}} [/tex]
Information:
T = duration of decay
t1 / 2 = elemental half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
At the core, the reaction applies the law of eternity
• 1. energy
the energy before and after the reaction is the same
• 2. atomic number
the number of atomic numbers before and after the same
• 3. mass number
the number of mass numbers before and after the same
Particles that play a role in core reactions include
• alpha α particles ₂He⁴
atomic number decreases by 2, mass number decreases by 4
• beta β ₋₁e⁰ particles
atomic number remains the same , mass number decreases by -1
• gamma particles γ
Core reactions that occur usually release high energy
• positron particles ₁e⁰
atomic number remains the same , mass number decreases by +1
In general, the core reaction equation can be written:
X + a ---> Y + b + Q
X = target core
a = particle fired
Y = new core
b = the particle produced
Q = heat energy
or can be written simply
X (a, b) Y
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The process of expanding air causes cooling, an adiabatic process where temperature changes without loss of heat.
When oxygen and aluminum form an ionic compound, what is the formula?
The correct answer is
D .al2O3
Explanation:
The offense in electronegativity is subject for the ionic bonds in aluminum and oxygen, Ionic bonds are created between cations and anions. A cation is formed when a metal ion spends a valence electron while an anion is produced when non-metal gains a valence electron. They both achieve a more stable electronic arrangement through this change.
What is the magnitude of the dipole moment formed by separating a proton and an electron by 85 pm ?
The dipole moment (p) resulting from the separation of a proton and an electron by 85 pm is approximately 3.7 Debye. This is calculated using the formula p = (+e) * (85 x 10^-12 m), where e is the elementary charge.
The magnitude of the dipole moment formed by separating a proton and an electron by 85 pm is indeed approximately 3.7 D (Debye).
Dipole moment formula: The dipole moment (p) of a molecule is calculated as the product of the charge (q) separated by the distance (D) between the charges. In this case, the charges are the electron (-e) and the proton (+e), and the distance is 85 pm (picometers).
Plugging in values: e = 1.602 x 10^-19 C, D = 85 x 10^-12 m, and the distance needs to be converted to meters: 85 pm = 85 x 10^-12 m.
Calculation: p = (+e) * (85 x 10^-12 m) = 1.602 x 10^-19 C * 85 x 10^-12 m ≈ 3.7 x 10^-30 C⋅m.
Converting to Debye: Since the Debye unit (D) is a convenient unit for dipole moments, we convert the result: 3.7 x 10^-30 C⋅m ≈ 3.7 D.
Therefore, the magnitude of the dipole moment in this case is approximately 3.7 Debye.
List two assumptions of the Kinetic Molecular Theory.
Answer :
These are 5 assumptions of the kinetic molecular theory.
The first assumption is that the gases are made up of the tiny or small particles. The small particles has undefined volume but has a defined volume.
The second assumption is that the gas particles are in the continuous, rapid and random motion.
The third assumption is that the there is no force of attraction between gas particles.
The fourth assumption is that the temperature of a gas particles depends on the average kinetic energy of the particles of the gas.
The fifth assumption is that the collisions between the particles of the gas are completely elastic. That means there is no loss or gain of the energy when the particles of the gas colloid.
write the balance equation for dehydration
of cyclohexanol
The balanced equation is written as;
C₆H₁₁OH (cyclohexanol) → C₆H₁₀(cyclohexene) + H₂O (water)
How to determine the equationThe balanced chemical equation for the dehydration of cyclohexanol C₆H₁₁OH to form cyclohexene (C6H10) is as follows:
C₆H₁₁OH (cyclohexanol) → C₆H₁₀(cyclohexene) + H₂O (water)
This equation represents the removal of a water molecule (H2O) from cyclohexanol to produce cyclohexene.
The process is typically carried out with the help of an acid catalyst, such as concentrated sulfuric acid (H₂SO₄).
The balanced equation shows that one molecule of cyclohexanol yields one molecule of cyclohexene and one molecule of water.
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The dehydration of cyclohexanol results in the formation of cyclohexene and water. This reaction is acid-catalyzed and proceeds through protonation, formation of a carbocation, and deprotonation steps. The balanced equation is C₆H₁₂O → C₆H₁₀ + H₂O.
Dehydration of Cyclohexanol
The process of dehydration involves the removal of water (H₂O) from a molecule. The dehydration of cyclohexanol (C₆H₁₂O) to form cyclohexene (C₆H₁₀) is an example of this type of reaction. This reaction is typically catalyzed by an acid such as phosphoric acid (H₃PO₄) or sulfuric acid (H₂SO₄).
Balanced Equation:C₆H₁₂O (cyclohexanol) → C₆H₁₀ (cyclohexene) + H₂O
The following is a step-by-step mechanism for the dehydration of cyclohexanol:Protonation: Cyclohexanol receives a proton (H⁺) from the acid catalyst, forming a protonated cyclohexanol.Formation of Carbocation: The protonated cyclohexanol loses a water molecule, forming a carbocation intermediate.Deprotonation: The carbocation loses a proton, resulting in the formation of cyclohexene.The final product, cyclohexene, is an alkene that results from the elimination of water from cyclohexanol.